BMMCC 14.8V Battery Module by RADIOPROEKTOR

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Justin Jackson

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostTue Feb 05, 2019 6:58 am

Dont change course Dimitry.. what you have built looks great. I have 2 NPF970 batteries, and one is heavier than my 4 18650 cells. Worse, it only powered my atomos Inferno for 30 minutes before dying. I think I got crappy ones though, because the size of this battery looks like it fits 4 18650s in it internally.
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostTue Feb 05, 2019 7:24 am

There is not too many things that i can change now. All components and enclosures in batch are already machined, partially assembled and waiting for final assembly. Too many funds invested to change something dramatically right now. Just some things in real life not always appears same as you expected. For example some soldering in real life appears more complicated than i expected. Due etching specific technology parts appears slightly smaller in size than expected. And so every manufactured component adds its own tiny corrections. Currently i try to optimize process and do calculations of thermal shrink tubes diameters and do many other tiny tests and experiments that where impossible reproduce during 3D modeling. I just not too happy that project in real life appears many times more complicated than expected and delayed for 8 months from expected release date.
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Tommaso Alvisi

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostTue Feb 05, 2019 3:52 pm

Thanks Dmitry for the updates!

do you know an approximate cost for these modules?

And what about an ETA? ;-)

Cheers!!!!
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rick.lang

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostTue Feb 05, 2019 5:46 pm

Australian Image wrote:... that's what happens to even the best and biggest companies in the world with way more resources at hand than you have. And sometimes it can be the simplest thing that halts a multi-million dollar project.


Like not being able to source sufficient quantities of a screw!


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Justin Jackson

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostTue Feb 05, 2019 7:40 pm

Dimitry, pretty sure everyone here who plans to buy one from you appreciates your honesty, updates and understands that "**** happens" as they say. I would rather see quality over on time quantity. Take your time, make it right, that is the better approach I have found. Some people are wankers, they just cant be positive or understanding. See it all the time on kick starter projects. Waited 3 years for a keyboard that was slated for 8 months, etc. Stay the course my friend. It will come together for you.
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostThu Mar 07, 2019 3:16 pm

So i finally adjust the workflow and was able to fully assemble first 5 boxes. Assembly goes fast and easy now!

But there are also some bad news.
1. I still don't setup manufacture of LP-E6 plates.
2. Unfortunately casted rear caps appears not too reliable as i expected. They are hardened and also shrinked about 0.5mm over time. This makes some of them crack at the corner when i put them on and off the body for a test. My guess it may additionally caused by random micro air bubble inside the wall that begins cracking process. This also combined with not too elastic enough material. So my next workaround is to find a more flexible casting material. Also because material is not too flexible and shrinked, the caps are not too easy to take off until you have some learning experience how to do it. Not too user friendly as for me.
Another option is to redesign those caps for aluminum CNC manufacture which probably makes them look less pretty but more reliable.

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After some thinking i decide that the cap will be CNC machined from aluminum now. Factory manager tell me that caps will be manufactured closer to the end of the March.

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...and some 3d renderings with new rear cap design:

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Justin Jackson

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostThu Mar 07, 2019 3:57 pm

This is looking nice. Aluminum is the way to go in my opinion. It provides that durability you want... lot less likely to deal with pissed off customers who want refunds/returns. Though, if you are doing this in a small batch order I would say that these should be non-refundable. Going to be hard for you to make any sort of profit if some of them may get returned due to cracked corners. So I agree.. good choice to switch to aluminum. What will the final USD cost be for these?
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostThu Mar 07, 2019 4:21 pm

Justin Jackson wrote:What will the final USD cost be for these?

The total manufacture price is riced a lot due those expensive unlucky experiments. Only wasted CNC machined molding master models for rear shell costs me about $300. Also lot of other stuff and tools where wasted for those shrinked cracked rear caps. But when you design something new, you always have a lot of additional expenses for experiments and research.
But i still expect to keep final price $125 for a full kit with LP-E6 plate, 1/4" screws, hex key, screwdriver and four DC cables with different length and plug size.
Also as usual if someone on high budget production wants add more support to the project he can make additional donation by purchasing "Optional Enhanced Packaging"
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Denny Smith

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostThu Mar 07, 2019 6:56 pm

$125-150 sound good Dmitry, count me in. :mrgreen:
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rick.lang

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostFri Mar 08, 2019 5:59 am

I’ll wait for user feedback on the production model but likely will want one to house the two genuine LP-E6N batteries that arrived today, looking around for the BMPCC4K that hasn’t arrived.


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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostFri Mar 08, 2019 11:14 am

Dual Canon LP-E6 plate makes no sense because you still got rather low capacity and too expensive battery solution. LP-E6 power socket connection is very weak and complicated, they are designed for internal usage and limited in fixed size. Single LP-E6 battery on BMMCC is perfect if you need ultra lightweight and compact rig for drone or gimbal. In all other situations LP-E6 battery feels very limited.
I was always thinking about dual Sony NP-F battery plate in similar form factor. It may be designed somewhere in distant future.
But even crappy dual noname NP-F will cost a lot, and even genuine Sony NP-F never reach 50Wh mark as current best quality branded 4 x 18650 cells.
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Niklas Olofsson

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostFri Mar 08, 2019 11:27 am

... as an alternative for the BMPCC4K I was thinking of this two Batteries:

http://www.idxtek.com/products/sb-u98
http://www.idxtek.com/products/sb-u50

would be nice to have a Mount/Adapter for that.
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostFri Mar 08, 2019 11:48 am

Yep, interesting. seems new battery on the market. $135 for that IDX 14.8v 48Wh battery + $30-50 for battery plate something like this https://www.aminimart.com/sony-bp-u60-b ... a-rig.html
But it still can't be mounted directly to BMMCC :)
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostFri Mar 08, 2019 11:54 am

By the way, i have secret (very secret) ongoing battery enclosure project for non BMMCC users. Kind of universal 18650 enclosure. It should be simpler in manufacture and probably less expensive. But it can't be done until i sold current BMMCC batteries batch and collect some funds for manufacture, so don't expect it soon...

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rick.lang

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostFri Mar 08, 2019 5:53 pm

Dmitry, I was forgetting the details but reread your first post and see this is not for me since I don’t have the target camera! Sorry about that. Later.


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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed Apr 03, 2019 8:36 am

rick, it just designed to fit BMMCC at first place but same time it can be used with any other camera.

I just got feedback and photos from the CNC factory. It is all about those tiny 1mm inner corner radiuses with 25mm depth. Those kind of things are very hard to machine and in normal situations they should never be in CNC parts design :)
The large cap is ok now, we are producing it now. For the producing, we have broken many knives.


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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostThu May 02, 2019 3:59 am

After some delays in delivery due easter holidays and may holidays package with CNC machined parts should arrive today. Other parts are waiting to be assembled. As you can see no any problems with soldering, but overall process is still rather slow for mass production. Need to tin plate those tiny metal parts, bend connectors, cut shrink tube with proper length, put two layer of thermal shrink tube, solder it, clean up flux, cover with protective paint. I try to do all processes in batch to speedup things. Also last months i use modular storage boxes which makes things way more organized. In future versions battery will be assembled on custom made PCB plate. This should simplify design and speedup thins a lot.

P.S. Dummy LP-E6 plates are still not manufactured yet. Probably first i can ship battery and later LP-E6 plates as separate part.

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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 08, 2019 1:08 pm

I finally assembled and tested some amount of enclosures and ready to ship them for those who where interested in this product at early days. Please check your emails and PMs with link to hidden item in marketplace. Let me know if someone else is interested.

I still don't finished the manufacture of LP-E6 plate. In nearest week i will do some test molding and casting samples but as you can see there is no guarantee that things goes smooth and problem free.

Currently I decide put to marketplace battery enclosure kit without LP-E6 plate for those who can't want anymore. You can use it on rail block or connect somehow to your rig. Later you can purchase LP-E6 plate as separate item if you feel that you need it.

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Niklas Olofsson

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 08, 2019 1:14 pm

Dmitry Shijan wrote:By the way, i have secret (very secret) ongoing battery enclosure project for non BMMCC users. Kind of universal 18650 enclosure. It should be simpler in manufacture and probably less expensive. But it can't be done until i sold current BMMCC batteries batch and collect some funds for manufacture, so don't expect it soon...

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.. is the image to the right the "none" BMMCC Battery Module?
Will that one work for the BMPCC 4K ?
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 08, 2019 1:23 pm

Both will work with BMPCC 4K. Only the shape of enclosures is different.

14.8V Battery Enclosure Module developed by RADIOPROEKTOR for Blackmagic Micro Cinema Camera (BMMCC) and Blackmagic Micro Studio Camera 4K (BMMSC).
This Battery Module uses camera LP-E6 type battery plate as passive quick release clamp mount, and outputs 14.8V power from external socket connectors. It perfectly fits to size and shape of SmallRig BMMCC cage, compatible with BMMCC Wooden Camera Cage and many other BMMCC cages. It can be used with any other rigs, cameras, LED lights, monitors and devices. Compatible with other custom made BMMCC accessories designed by RADIOPROEKTOR.
Built-in mini Cheese Plate designed to fit exactly to size and shape of SmallRig Mounting Cheese Plate 1598. Quality electronic components and connectors inside and outside. Built-in DC splitter allows to plug up to 3 devices simultaneously. Built-in battery capacity meter and ON/OFF switch. Perfect cable management, powerful, lightweight, low profile, cost-efficient and future-proof.
Battery cells are NOT included in the package. You can purchase any 4x 18650 type UNPROTECTED lithium-ion battery cells somewhere in your local electronics store. It will cost you only $20-25 total.

It is also highly recommend to use separate battery to power the monitor. Powering camera and monitor connected to camera HDMI port from same battery cause the "Ground Loop problem". Ground Loop connection combined with electrostatic discharge sparks and poor quality HDMI cable shield insulation may permanently burn camera HDMI/SDI port.

Package includes:
- Battery Enclosure Module with removable rear shell (18650 battery cells are NOT included in the package)
- Removable passive Canon LP-E6 type connection base (not available yet)
- 4x M3 flat head screws
- 3x 1/4"-20 3/8" length button head screws
- 5/32" allen wrench hex key
- Tiny Phillips cross-head screwdriver
- 13cm DC power cable with 5.5x2.1mm angle plug connector
- 13cm DC power cable with 5.5x2.5mm angle plug connector (5.5x2.1mm compatible)
- 29cm DC power cable with 5.5x2.1mm angle plug connector
- 29cm DC power cable with 5.5x2.5mm angle plug connector (5.5x2.1mm compatible)

Optional accessories for request:
- 16.8V 2A charger (currently i have 2 chargers in stock)
- Additional DC cables.
All my custom made accessories for BMMCC/BMMSC now available here https://lavky.com/radioproektor/
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Niklas Olofsson

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 08, 2019 1:27 pm

.. but is the "right" one bigger.. more cells?
I like the design of the right one :)

Have you testet how long it will power the Pocket 4K ?
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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 08, 2019 1:32 pm

Where can I buy? Can China buy it?
12-Core AMD Ryzen Threadripper 1920X, 3700 MHz (37 x 100)
Asus ROG Strix X399-E Gaming
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 08, 2019 1:42 pm

Niklas Olofsson wrote:.. but is the "right" one bigger.. more cells?
I like the design of the right one :)

Have you testet how long it will power the Pocket 4K ?


Both use 4 x 18650 cells. Size difference is only 5-10 mm. Enclosure at the right visually looks way larger because shape is different. Kind of optical illusion. Battery at the right will be available only in 5-6 months i hope. And yes, it looks cool!
Current battery enclosure was designed to fit to BMMCC shape and size at first place.

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I don't have Pocket 4K. But i done some power consumption measurements:
BMMCC = 7.75W (8.06W during recording)
SmallHD 501 monitor (100% brightness) = 6.9W

Battery Module average output 14.8V x 3.4A = 50Wh (watt-hour)
50Wh : 8.06W = 6.2 hours total
50Wh : 6.9W = 7.2 hours total

Where can I buy? Can China buy it?

I send PM to you
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Niklas Olofsson

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 08, 2019 3:54 pm

... send me a PM too,... but maybe I'll wait for the "universal" Battery Module :)

I have a BMMSC 4K - which I don't use anymore - I powered that camera always "external".

Will your "universal" Battery Module have 5V USB outputs too? Would be very nice for the Tilta Nucleus Nano.
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 08, 2019 4:05 pm

Niklas Olofsson wrote:... send me a PM too,... but maybe I'll wait for the "universal" Battery Module :)

I have a BMMSC 4K - which I don't use anymore - I powered that camera always "external".

Will your "universal" Battery Module have 5V USB outputs too? Would be very nice for the Tilta Nucleus Nano.


Yes, new "universal" Battery Module will have additional full sized 5V USB output at the bottom side. It will also support Quick Charge 2.0/3.0 technology for modern smartphones.

Tilta Nucleus Nano can be powered from current battery directly from 14.8v with simple DC to USB adapter cable. Higher voltage provide less motor delay and better torque.

Today i'll start to prepare for LP-E6 plates manufacture. During the week i'll let you know how things are going on. When LP-E6 plates will be ready i will put full kit to the marketplace for everyone.
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Tommaso Alvisi

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 08, 2019 4:40 pm

Nice!

BTW I think you could offer micro usb to DC 5.5 cable of approx 30/40/50cm made by your cable guys. ;-)

Also a DC 5.5 to 7 pin nucleus m cable ;-)
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 08, 2019 5:07 pm

Probably i can do additional cables in future. At least DC to angle usb for Nucleus N. USB connector like this should work well.

7 pin nucleus M connector as well as BMPCC4K plug are less common and need some additional research and investment.

For same reason i don't use P-Tap or D-Tap socket on the battery enclosure body. This connector is very common for batteries but i never see it in retail electronics stores. Only P-Tap or D-Tap for DIY cables are available everywhere.

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 08, 2019 5:33 pm

You could always just make a D/P Tap cable to fit the barrel connectors you use.
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 08, 2019 5:51 pm

Denny Smith wrote:You could always just make a D/P Tap cable to fit the barrel connectors you use.
Cheers


Sure it is possible. But D/P Tap connector makes sense in those kind of batteries if you want to power some really high wattage device. If you look at the tech specs i provided earlier (PCB board and internal cables can hold 30A max) the weakest place is DC connector because in data sheet it is rated to 2A 24V max. Also in some ISO data sheets 5.5x2.1 barrel connector recommended to use in devices with max 12 volt consumption. Probably that is the reason why power hungry Pocket4k use different type of DC connector.
Similar 5.5x2.1 full metal barrel DC socket connectors can hold way more amps, that's why i want to use them in new universal battery enclosure.

I tested my current battery enclosure with 5A load (74W total) connected to one single connector and can't see any temperature increase around the components or around DC connectors. But to be 100% safe it is recommended to keep it under 50W load.
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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 08, 2019 6:10 pm

Thanks, good info Shijan.
Cheers
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostTue May 14, 2019 3:11 am

Here are some real life discharge/charge tests and measurements done today. For measurements and discharge i use special electronic load device.
Discharge current was set to 2A (average 30W load).
Battery cells used - SANYO NCR18650GA 3500mA.

Fully charged battery voltage is 16.8V, but when you connect 30W load, voltage drops somewhere to 15.9V
Discharge time from fully charged to 12V = 1 hour 30 minutes.
Discharge time from fully charged to 11V = 1 hour 35 minutes.
Discharge time from fully charged to 10V = 1 hour 39 minutes.
Protection circuit automatically turns battery off when voltage drops under 10V.
Charge time with recommended 2A charger = 2 hours
Real life battery capacity for 30W device load = 45 watt-hour.
As you may know real life battery capacity highly depends of device wattage load. Less wattage consumption may allow to reach 50-55 watt-hour capacity.

Power consumption measurements:
BMMCC = 7.75W (8.06W during recording)
Pocket Cinema Camera 4K = 22W max. (high frame rates, screen at 100% and recording to a media)
SmallHD 501 monitor (100% brightness) = 6.9W
Video Assist 5" = 9W

Discharge time calculations:
BMMCC = 6.2 hours
Pocket Cinema Camera 4K = 2.2 to 4 hours (depends of camera settings).
SmallHD 501 monitor = 7.2 hours
Video Assist 5" = 5.5 hours

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Niklas Olofsson

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostTue May 14, 2019 3:56 pm

Just saw this:

https://patona.de/akku-v-mount-kamera-p ... 421?c=2309

I think your "universal" Battery Module could become something like that... powering Camera, Monitor* and Nucleus - all with one Battery.


edit*
.. "Ground Loop problem" :?
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostTue May 14, 2019 11:05 pm

Yep, another nano v-mount brick with external D-Tap.
My future "universal" battery is only concept. It can not happen until i sell current battery batch because i don't have enough funds to start manufacture and also still need a lot of time for development. It may not happen at all. Please don't expect that it will be released in near future.

Current BMMCC battery is in stock now. PL-E6 plates casting goes well, but i still do some adjustments to make them 100% bubble free.

You can power any camera with current battery. With DC to microUSB adapter you can even power Nucleus N with it.

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Every existing battery or with parallel DC outputs or power splitter breakout plate are Ground Looped, but no one except me warn you about this :) Same time Ground Loop problem may be exaggerated because a lot of people power camera and monitor without any problem. I just still don't understand the nature of this problem too clear to make sure if it safe or not. HDMI port on my BMMCC camera was not stable from first days and lost signal very often. Maybe it was defective HDMI chip, maybe it was just damaged due low quality HDMI cable i used. I just don't know. As i wrote in my post - all i can know clear is that HDMI stopped working right after electrostatic shock spark to camera from my body generated by wool or fleece sweater.

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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostTue May 14, 2019 11:17 pm

Also please note that currently i rearrange items in marketplace.
Shipping & Packaging cost now provided as separate item and should be added to cart separately.
Worldwide Shipping & Packaging cost:
1x Battery Enclosure + LP-E6 plate = $14
1x Battery Enclosure + LP-E6 plate + 1x Charger + other optional small BMMCC accessories kits = $19
2x Battery Enclosures = $19
2x to 4x Battery Enclosures + 1x Charger + other optional small BMMCC accessories kits = $24
3x to 5x Battery Enclosures = $24

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Last edited by Dmitry Shijan on Sun May 19, 2019 1:20 pm, edited 1 time in total.
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Niklas Olofsson

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 15, 2019 5:56 am

Dmitry Shijan wrote:Yep, another nano v-mount brick with external D-Tap.
My future "universal" battery is only concept. It can not happen until i sell current battery batch because i don't have enough funds to start manufacture and also still need a lot of time for development. It may not happen at all. Please don't expect that it will be released in near future.

Current BMMCC battery is in stock now. PL-E6 plates casting goes well, but i still do some adjustments to make them 100% bubble free.

You can power any camera with current battery. With DC to microUSB adapter you can even power Nucleus N with it.

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Every existing battery or with parallel DC outputs or power splitter breakout plate are Ground Looped, but no one except me warn you about this :) Same time Ground Loop problem may be exaggerated because a lot of people power camera and monitor without any problem. I just still don't understand the nature of this problem too clear to make sure if it safe or not. HDMI port on my BMMCC camera was not stable from first days and lost signal very often. Maybe it was defective HDMI chip, maybe it was just damaged due low quality HDMI cable i used. I just don't know. As i wrote in my post - all i can know clear is that HDMI stopped working right after electrostatic shock spark to camera from my body generated by wool or fleece sweater.




This "Ground Loop Problem" seems to be a big issue ... have there been an official statement from Blackmagic - do this concerns alle Camera / Monitor / one Battery solutions - or is it just a Blackmagic Problem?
What about those "features" where the Monitor Power is powering the camera - as SmallHD and other Manufacturer offers?

For your "Universal" Battery Holder ... maybe SmallRig can produce a "DreamRig" :)
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 15, 2019 6:04 am

This is a quote i got from BMD Support earlier:

Potential causes of SDI failure and how to minimize them.

Isolated Grounds
Isolated grounds may be implemented on a battery plate for safety reasons to allow for isolation between individual devices powered by the plate.
If two devices are connected to individual power connectors AND also have an additional cable between them, there could be the chance of voltage offset.
For example, with an EVF setup, where the camera is on one battery plate power connector, the EVF is on a second plate power connector, and an SDI cable is connected between the devices. Assuming that the SDI connector is internally connected directly to the power negative on each device (chassis ground), then the circuit design will be utilizing the SDI cable shield to provide the common ground connection between the two power supplies. If either the camera or the EVF DO NOT have their SDI shield conductor connected directly to chassis ground, if the SDI cable length is sufficiently long or of poor quality, then the shield in the SDI cable will act as a low-value resistor, and a current will flow through the cable shield between the two devices. You could expect a potential difference measured from one supply's ground to the other.
If the camera and monitor are using either two independent power sources or two power sources on the battery plate where the D-Tap connector may be connected directly to the battery terminals it may have a different negative potential to that of the rest of the power connectors. Ground connection contact bounce may occur and there could be a chance of damaging SDI ports. Contact bounce may also cause all manner of transient voltage spikes to go through the equipment and could cause unforeseen issues.

Prevention
If you have a battery plate with isolated ground supplies, it is recommended to only use it if both the camera and the EVF were powered from the exact same power connector. This can be achieved by plugging a D-Tap multi-tap into the plate D-Tap connector, then connect individual D-Tap cables from the multi-tap to the camera and EVF. That way they are using a common negative connection, with no chance for floating voltage potential variations.
If avoidable SDI interfaces should not be hot-plugged. When setting up or dismantling camera setups make sure that all devices are completely turned off before making any connections to any of the device's inputs or outputs, and any batteries that can be, should removed or disconnected since some battery outlets are always powered.

Electrostatic Discharge (ESD)
This can occur randomly at anytime and can be caused by clothing, packaging, plastics and atmospheric conditions. If you are carrying even a small static charge, you could possible damage sensitive electronic components.
Whilst BNC connectors are designed to minimise contact with the center conductor, if you inadvertently touch near the center contact you could cause a static discharge.

Prevention
The same static prevention measures used when handling sensitive electronic components should be employed when handling video production equipment
As a matter of course discharge yourself when handling a device by touching any large metal object next to you such as a metal table or metal stand or water pipe etc.
SSD drives and the SATA interfaces also do not have high ESD protection.
Always keep any antistatic bags that the SSD drive came in, and always use them for transport and storage of the drive. Use care and try to never touch the drive contacts. SDI ports may also quite sensitive to ESD so static safety precautions should also be implemented when connecting or removing cables.
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Niklas Olofsson

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 15, 2019 6:23 am

So actually a "Power Hub" is the solution.. splitting up the power for the camera and the monitor to power them from one Tap... or did I misunderstand that?

https://tilta.com/shop/dc-ptap-splitter/
https://tilta.com/shop/g1-dc-splitter-male-dual-female/

Isn't your Battery Module build like that anyway?
There is no "Plate" and all your Outputs should have the same ground.
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostWed May 15, 2019 6:51 am

Niklas Olofsson wrote:So actually a "Power Hub" is the solution.. splitting up the power for the camera and the monitor to power them from one Tap... or did I misunderstand that?

https://tilta.com/shop/dc-ptap-splitter/
https://tilta.com/shop/g1-dc-splitter-male-dual-female/

Isn't your Battery Module build like that anyway?
There is no "Plate" and all your Outputs should have the same ground.


Yes, my Battery Module build like that. It just have a build-in passive cable splitter without any additional step-up/down voltage converters.
But any camera or monitor have their own internal DC-DC power regulators. Each of them outputs different voltage. That could probably produce Ground Loop. So Power Hub splitters is not the solution i guess. I am not too advanced in theory of electricity so i can not be sure about this.
The only thing i sure is that HDMI/SDI ports on BM cameras don't have any protection from electrostatic discharge.
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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostFri May 17, 2019 6:53 pm

Battery Enclosure kit includes:
- Battery Enclosure Module with removable rear shell
- 4x M3 flat head screws
- Phillips cross-head screwdriver
- 13cm DC power cable with 5.5x2.1mm angle plug connector
- 13cm DC power cable with 5.5x2.5mm angle plug connector (5.5x2.1mm compatible)
- 29cm DC power cable with 5.5x2.1mm angle plug connector
- 29cm DC power cable with 5.5x2.5mm angle plug connector (5.5x2.1mm compatible)

LP-E6 type connection plate kit includes:
- Canon LP-E6 type dummy connection plate
- 3x 1/4"-20 3/8" length button head screws
- 5/32" allen wrench hex key

Air Mail Worldwide Shipping cost:
1x Battery Enclosure + LP-E6 plate = $14
1x Charger = $14
1x Battery Enclosure + LP-E6 plate + Charger + other optional small BMMCC accessories kits = $19
2x Battery Enclosures = $19
2x to 4x Battery Enclosures + Charger + other optional small BMMCC accessories kits = $24
3x to 5x Battery Enclosures = $24

UPS Express Shipping to USA, Canada, Australia, EU, UK, Switzerland and Japan cost:
1x Battery Enclosure = $32
1x Charger = $32
1x Battery Enclosure + LP-E6 plate = $32
1x Battery Enclosure + LP-E6 plate + Charger = $37
2x Battery Enclosures = $37
2x Battery Enclosures + LP-E6 plate + Charger + other optional small BMMCC accessories kits = $40
3x Battery Enclosures = $40
3x to 4x Battery Enclosures + Charger + other optional small BMMCC accessories kits = $44
4x to 5x Battery Enclosures = $44

ORDER HERE: https://lavky.com/radioproektor/

Here are also some new images that may explain better how parts are connected:

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Last edited by Dmitry Shijan on Sun Aug 18, 2019 4:43 am, edited 1 time in total.
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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostThu May 23, 2019 8:53 pm

Here are more fresh product images (all shoot on BMMCC)

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Last edited by Dmitry Shijan on Sat May 25, 2019 2:54 am, edited 3 times in total.
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Niklas Olofsson

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostFri May 24, 2019 10:32 am

Looks very nice :)
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostTue May 28, 2019 9:02 am

Currently one great idea came into my head! Because Battery Enclosure have multiple parallel sockets, you can connect two or more Battery Enclosures with provided DC cable and multiply capacity two times! 2x batteries give you 100 watt-hour total, 3x batteries 150 watt-hour and so on... voltage remains unchanged. This may be useful for power hungry Pocket 4K camera users.
Two batteries may be attached to single SmallRig Mounting Cheese Plate 1598, so you can use them as one single brick, or as rig counterweight.

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And few worlds about current state of LP-E6 type connection plates:
BMMCC/BMMSC LP-E6 socket is slightly unusual and varies of "classic" LP-E6 size and shape. Earlier the main idea was to make LP-E6 type connection plate for this battery enclosure compatible with any existing LP-E6 sockets. As a result i got less tight connection with BMMCC/BMMSC cameras so battery feels slightly wobble. Also Axson F38 polyurethane shrink a lot more than i expected (average 0.2mm at every dimension) which additionally affect connection tightness. It is not too bad, but just not perfect.
It appears that in real life there almost no any device except BMMCC camera that could be usable with this LP-E6 type connection plate. So during next months i am thinking to redesign drawings, order new aluminum CNC machined master model and release version 2 of LP-E6 type Connection Plate. It will fit to BMMCC more precise but will not be compatible with LP-E6 sockets on other devices.
If current LP-E6 type connection plate is too wobble for your taste, you can always put few layers of sticky tape shims in front of it. Also if you wish, anytime later you can upgrade to new tighter LP-E6 type connection plate.
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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostFri May 31, 2019 6:49 pm

...hot swappable :)

Another thought .. how quick can you change the batteries inside?
Maybe it is possible to change the screws from the cap with „thumbscrews“ to open the cap easy for changing empty batteries
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Dmitry Shijan

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostFri May 31, 2019 7:14 pm

Yes. Dual battery setup is kind of hot swappable.

Maybe it is possible to change the screws from the cap with „thumbscrews“ to open the cap easy for changing empty batteries

You can do that but it is total waste of time in the field. I suggest just get proper charger and plug it into any battery DC socket to charge it.

From my test with 2A Charger it takes 2 hours to charge fully discharged battery pack.

Here is updated Charger FAQ:
Any existing 16.8V 1-2A CC/CV (Constant-Current/Constant-Voltage) charger will work and will cost you starting from $3:
https://www.ebay.com/sch/16.8V+charger
https://www.aliexpress.com/wholesale?Se ... 8V+charger
Some battery cells require 1A, some 1.7A normal charge current. For rapid charging some modern batteries may support maximum current up to 4A, but they may became very hot during that extreme charging. Higher charging current = faster charge = quicker battery degradation, but i think it is not a problem when you can just replace battery cells after about 500 full charge cycles (1-3 years of usage). 2A probably the safest and most optimal charging current that provides best speed vs quality ratio. !!! Just to be safe and simple - do NOT use charging current larger than 2A for this battery enclosure !!!
Here is recommended reliable 16.8V charger that you can order directly from manufacturer https://www.aliexpress.com/item/16-8v-2 ... 16636.html 1A, 2A, 2.5A, 3A, 4A and 5A models available. They use quality internal parts and have recognizable design that can't be confused with other DC adapters in your bag. Just ask seller for DC plug 5.5x2.1mm and AC plug type depending of your worldwide location.

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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostSun Jun 02, 2019 12:47 pm

Dmitry Shijan wrote:
Niklas Olofsson wrote:So actually a "Power Hub" is the solution.. splitting up the power for the camera and the monitor to power them from one Tap... or did I misunderstand that?

https://tilta.com/shop/dc-ptap-splitter/
https://tilta.com/shop/g1-dc-splitter-male-dual-female/

Isn't your Battery Module build like that anyway?
There is no "Plate" and all your Outputs should have the same ground.


Yes, my Battery Module build like that. It just have a build-in passive cable splitter without any additional step-up/down voltage converters.
But any camera or monitor have their own internal DC-DC power regulators. Each of them outputs different voltage. That could probably produce Ground Loop. So Power Hub splitters is not the solution i guess. I am not too advanced in theory of electricity so i can not be sure about this.
The only thing i sure is that HDMI/SDI ports on BM cameras don't have any protection from electrostatic discharge.


... still stucked in this ... because it is interesting - I am no electronics technician, but just a thought - what if you have a power "plate" powering monitor and camera... and if that power plate has a HDMI or SDI loop, to send the signal from camera to monitor through the plate to get the same ground?
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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostSun Jun 02, 2019 1:26 pm

Niklas Olofsson wrote:... still stucked in this ... because it is interesting - I am no electronics technician, but just a thought - what if you have a power "plate" powering monitor and camera... and if that power plate has a HDMI or SDI loop, to send the signal from camera to monitor through the plate to get the same ground?


Ground loop itself is not a big problem. For example when you plug TV and DVD player to same AC power socket and connect them with HDMI cable - you got ground loop.
Power the camera and microphone from same battery and connect them with audio cable - you got ground loop.
The problem is how electronic components are protected from additional external electrostatic discharge sparks.

Here are simple solutions to isolate grounds and avoid ground loop problem:
- Use separate battery for monitor. Actually in real life it is simpler to operate with separate monitor battery. The weight of LP-E6 battery may be near the same as a long DC cable. Separate battery also adds additional total capacity.
- Use quality HDMI cable. Poor isolated shield may be produce voltage leak (unconfirmed).
- Avoid electrostatic discharge sparks from your body
- To avoid extra paranoia add Ring Core Ferrite Bead Clamps to the cables

Complicated solutions:
There are special circuits that allow physically isolate ground but they designed only for low voltage.
There are coil transformers that allow physically isolate ground but they are very huge and heavy.
There are also special circuits that protect HDMI from high voltage electrostatic discharge sparks (sort of fuse to protect HDMI chip) and it seems for economy reason BM cameras don't have that protection circuits inside (unconfirmed).

P.S. I done few new render sketches how battery may fit to very compact and lightweight shoulder BMMCC rig.

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Here is also updated list of Alternate Quick Release mounting systems for this battery:
Compact size Arca Swiss Clamps ($15) https://www.ebay.com/sch/Arca+Swiss+Clamp
Flat Manfrotto 200PL QR clamp by FotoPanda ($12) https://www.ebay.com/itm/Quick-Release- ... 1370068854
SmallRig Super lightweight 15mm RailBlock v3 942 ($10) http://www.smallrig.com/super-lightweig ... 3-942.html
SmallRig NATO Clamp 1885 ($40) http://www.smallrig.com/smallrig-nato-clamp-1885.html
SmallRig Handgrip Rosette Adapter ($39) https://www.smallrig.com/smallrig-handg ... -1887.html
SmallRig S-Lock Quick Release Mounting Device 1855 ($36) https://www.smallrig.com/smallrig-s-loc ... -1855.html
A MiniMart Mini Rapid Quick Release Plate ($13) https://www.ebay.com/itm/Mini-Rapid-Qui ... 0699932144
A MiniMart Quick Release Connector 1/4" Male Screw Adapter ($13) https://www.ebay.com/itm/Quick-Release- ... 3090803295
KONDOR BLUE Mini Quick Release Plate ($20) https://www.amazon.com/KONDOR-BLUE-Moni ... 07JLHHD6W/
POWRIG DSLR Monitor Quick Release Plate Adaptor ($20) https://powrig.com/collections/accessor ... te-adaptor
POWRIG Quick Release Plate Mount 1700-H Adaptor ($21) https://powrig.com/collections/accessor ... unt-1700-h
Slidekamera ultra compact V-Mount system (€85) https://www.slidekamera.com/v-mount-ada ... e-set.html
Wooden Camera V-Lock Base Station and Wedge Kit ($125) https://woodencamera.com/products/v-loc ... unt-3-8-16
Oben QRA-R2 Quick Release Assembly with RP-20 Plate ($30) https://www.bhphotovideo.com/c/product/ ... embly.html
Cameo V-Lock Kit ($150) https://www.abelcine.com/buy/camera-sup ... k-kit#tabs
Velbon QRA-3 B Mini Quick Release Adapter ($25) https://www.ebay.com/sch/Velbon+QRA-3+B ... se+Adapter
CAMVATE Quick Release V-Lock Base Station And Wedge Kit ($57) https://www.camvate.com/camvate-quick-r ... p2118.html
CAMVATE V-Lock Base Station And Wedge Kit ($29) https://www.camvate.com/camvate-v-lock- ... p1820.html

Image
Last edited by Dmitry Shijan on Wed Jun 05, 2019 2:06 pm, edited 1 time in total.
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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostSun Jun 02, 2019 6:49 pm

So like others have said, the only thing missing from this battery, perhaps besides locking connectors, is the ability to quickly open/replace batteries. I think you said you are working on a more generic version that would support that?

As I suggested, what you really need is a 4, 6 and even 8 battery slide in/out module so that we carry a couple of these battery modules with us, and can quickly open, slide out dead battery module, slide in new one, and done.

At least for me, with the fact that the BMPCC4K built in battery can maintain the camera on for a good 30 minutes or longer, and supports hot swap with the DC in, it is a no brainer to use a 4x18650 battery pack to power it and a monitor, and have a few more 4 pack modules ready to go. Each module could support a good 1.5 hours or so of recording and monitor use. They are smaller, lighter, and much easier to deal with especially with so many mounting options.

To me, honestly, this should be what just about everyone other than big heavy camera movies look to for powering options. Your module is the right size, right outputs, and make it quick to change battery modules it makes it an all around win.

One thing I would suggest, if its not on there, is a USB 4v1a or 2a output option. Many audio recorders can be powered by USB. Having that as well would allow the one unit to power a full rig.

Thoughts?
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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostSun Jun 02, 2019 8:08 pm

Until i sell some amount of battery enclosures i can't discuss any new details of new universal battery. It was only a quick sketch.
Wonder where are all those dozens of forum people who would like to preorder BMMCC battery enclosure when it was in development during past year?
One more time - i am against of "quickly open/replace batteries every time you need to charge them" concept. Just plug charger to any DC socket and charge it. Fast and sImple. 6 working hours from single battery for BMMCC is more than enough. Need more power - connect in parallel two or three battery enclosures mounted to the rods.
Why you keep asking things that where discussed many times earlier?
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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostTue Jun 04, 2019 9:20 pm

Dimitry,

Ill tell you why. Because what you have built is the perfect small size/weight power source that most of us want for run n gun and other uses. To mount the BMPCC4K and 5" or so monitor on a gimbal and power it for a few hours with a lightweight battery system is perfect. Stringing 2 or 3 together adds size and weight and more mount points. Charging the entire unit after it expires in 2 hours of use does not allow us to use it all day on a hike, boat, set, etc. Most of us that see what you built as an ideal size/weight solution to larger batteries will also not likely be able to just charge it when its dead. We need the ability to carry 2 or 3 or so with us, in a bag maybe. That said, the 18650 batteries are cheap. Your device is not. It is not as expensive as a bigger battery, but it is not super cheap either. So, being able to buy that unit, plus a modular way to quickly change batteries so that it can last many hours to all day without having to buy multiple units is what would make these units sell like crazy.
I realize you put some time and money in to building these first units. They tick a lot of boxes for some people, but the quick swap battery bit is the one thing most of us would want with this. Right now, I have to buy 2 vmount batteries, at about $150 each. I would rather buy your unit for $150 or whatever its price and ship is, and then a few sets of 4x18650 batteries at $30 for 4, and carry just the batteries (or some modular thing you offer to house 4 batteries and quickly swap in the unit), than spending the same amount of money on a battery that lasts longer. My Juicebox vmount 48wh battery that gives me about 2 hours of record time with monitor was $150. It is easy to mount with a smallrig vmount option to my setup, and its small/light enough to carry..but your unit is even smaller and a better fit for the small cage/camera setup with similar runtimes. Keep in mind, and no offense intended, but you are not a company that has produced 1000s or more batteries with warranties, etc. You are building a niche product that IS wanted (and needed) but everyone buying them takes a chance for around the same price they could buy a vmount battery from a company that is well established, has warranties, etc. So for me to take a risk, as I suspect many of those that are interested, it has to provide something more than what buying a battery can already do. Dont get me wrong, your mount options, the output options, etc.. are nice. But most vmount batteries offer one of 2 dtaps and USB output on them these days (or at least some do).

Again, I am not trying to offend you or make it sound like what you built is not good, not worth it, etc. You gained a lot of interest because it definitely ticks a few boxes other options do not. I also understand you need to sell all that you have to recoup the costs before you could look to make anything new with options we ask for. Perfectly fair. I have no doubt you will sell all of those in due time, be it from those on here and other forums and possibly other channels.

All that said, for me, I want a single 4x or 6x battery unit, with USB output (to power audio recorder), and preferably locking output options vs bullet connectors, with swap capable battery modules. That... if it provides a couple battery holder/modules with it, I would pay $300 for.
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Re: BMMCC 14.8V Battery Module by RADIOPROEKTOR

PostTue Jun 04, 2019 10:02 pm

If you want, you can use spare 18650 batteries and change them in the field. Just wrap rear cap with two rubber bands and so quick release rear cap without screws. Or don't use rear cap at all and just wrap batteries with same two rubber bands for additional secure. Use imagination.
This battery pack is designed for BMMCC camera, so it is essential that it can't fit to any workflow for every other camera.
This battery pack is still cheaper than any v-mount + plate + cable splitter box pack and way more cheaper than new modern compact sized v-mounts. If same battery pack was designed somewhere in UK or US by real company like Wooden Camera or Zacuto it will probably be 5 times more expensive.

Angle DC connectors are sort of locking because it is near impossible to pull them away and unplug.

Sure USB is useful option but with current internal design there is not enough space in this enclosure for USB.
I was thinking to made a additional small DC to USB box, but not sure if this idea may became popular. There are a lot of DC to USB board converters. They cost $1-2 dollars. You can just solder DC cable to them and build a simple DIY DC to USB adapter. I recommend this USB board (Input: 8-24V). It is powerful, well build and support QC 2.0 and QC3.0 smartphone charge modes. If you need it search on ebay/aliexpress/somewhere else for "QC3.0 USB board"

Image
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