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haifai

DIY smart battery solution DC for audio bag

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haifai   

So here we go...

DC solution for my small audio bag, powering SD 744T and Audio Development AD071.

Sony NP F and RRC 2054 compared:

IMG_2970.JPG

Charger:

IMG_2972.JPG

Battery cable, you got 2x DC (red and black wires) and 3 wires for the smart data (you dont need to use them if you dont want to add a control

display).

I ordered two as they are cheap for experimentation.

IMG_2962.JPG

For one of the battery cables i made a little "breakbox", one black and one red wire connected direct to hirose 4pin, one black and red wire connected

to a variable DC/DC voltage regulator - the one i used is a lot oversized, i took what i had laying round here (this one was 5€ new),  a simple step down converter for a few bucks should be good enough.

The regulated output can be switched off to keep it out off the circuit when not in use.

 

IMG_2952.JPG

IMG_2968.JPG

the cables for the smart bus data are not used, i gonna replace the DC/DC converter with something smaller later and put a connector with the 3 smart bus wires at the case, maybe one day i feel like adding a control display to the set...

with the second battery cable i gonna make a more simple solution, at my first test i remarked that i really dont need a step down conversion...

when i tried to use my ad071 mixer last time with a fully charged NP 1 battery it refused to work, it was O.K. only with a not fully charged NP1...

Strangely enough with the fully charged RRC Battery the mixer is working without problems, so i gonna put a simple 7pin neutrik xlr connector direct

at the second cable and make a simple snake (split cable from a neutrik 7pin to 2x Hirose 4pin male for DC and 1 Hirose 4pin female for the smbus data if one day i feel like connecting a control display.

 

At least one image of my old "breakfast lunchbox solution" to give "eye cancer" to the electronic engeneers in this forum ;-)

That has worked the last year for powering just my AD071 mixer flawlessly...

Its  working up to 5h (depending the mics attatched, 2 channels phantom power activated).

 

IMG_2963.JPG

I am not an electronic engeneer, so my soldering skills are limited...

Shurely there are professional guys that are able to do better but i am happy with my homebrew solution...

regards

karsten

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Hi Karsten, I am using something like this with my lipos.

Does not need extra power, shows single cells and overall voltage..

 

874938900_o.jpeg

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haifai   
2 minutes ago, soundchris said:

Hi Karsten, I am using something like this with my lipos.

Does not need extra power, shows single cells and overall voltage..

874938900_o.jpeg

its looking "smart"...

where did you get it and for how much?

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haifai   

thats a lot cheaper than the 150€ rrc display...

for the moment i am happy with the displayed voltage at my 744t, but when i do some soldering next time this little funny box is worth

trying...

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OPS   

Hello Karsten,
Inspired by your idea I have a box with integrated battery-slot. Hirose are with 2.5A resetable fuses on each output and one is in the loop.

 

The 3 smart bus wires give more information than the "capacity controller". I have heard that an Arduino can read the information and put it on a display.
I will be looking for more information.

Hirose Distribution Box 2.jpg

Smart Battery Hirose Distribution Box 1.jpg

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