12 Volt Battery

M

Mike Smith

Member
I want to run my DVX100A directly from 12 volt battery. I know I need a 12 volt to 7.2 adapter but I can't find one. Will this work? The 12 volt battery I have is about the size of a motorcycle battery. I will be using this during dance performances. I just don't trust camcorder batteries. I want to use a battery that I know has plenty of juice and I can monitor the voltage. Has anyone gone this way? and does anyone know where I can get an adapter.

Mike
 
Mike,

We've been doing it that way in our facility for years.
We utilized an old panasonic battery, removed the insides, connected a wire to the terminals and connected it to a converter which is connected to 12v battery.

In our case we used two 6 volt emergency lantern batteries glued together since this is lighter to carry in a beltbag than a 1 pc 12v battery. Though you might have a different kind of batt there in USA.
I'll try to post a pic in my site and link it here. I'll open the adapter to convert 12v to 7.9v so you can see the parts inside.

These batteries last a long time and theyre very cheap.
 
Mike Smith said:
I want to run my DVX100A directly from 12 volt battery. I know I need a 12 volt to 7.2 adapter but I can't find one. Will this work? The 12 volt battery I have is about the size of a motorcycle battery. I will be using this during dance performances. I just don't trust camcorder batteries. I want to use a battery that I know has plenty of juice and I can monitor the voltage. Has anyone gone this way? and does anyone know where I can get an adapter.

Mike
Click to expand...
We make them, the voltage monitor is built in.
HTH
Alex Dolgin
www.dolgin.net
 
Mike,

I posted some pics of our 12v to 7.9 v battery adapter. Sorry for the delay, kinda busy.
Get some electrical guy to interpret the internal parts.
My cousin who put it together is outta town.

link to pics
 
Alex-
Sure looks like you have a good thing going there. How about an additional output for an on-camera LCD monitor? I mean, right now there isn't a reasonable way to power one from a DVX with the same ease you could from, say, an Arri SR-3. It would be uber-convenient to carry a single marine-sized rechargeable battery in a road case with XLR output going into a faux battery pack on a DVX, with an additional XLR output for a monitor also on the faux battery pack... or, otherwise some implementation of the above which accomplishes the same that feels like it's part of the camera and permits a quick disconnect feature.

Is something like this a possibility? Let us know.

Thanks.
Brian Wells

adolgin said:
We make them, the voltage monitor is built in.
Click to expand...
P.S. - I think you'd find a market for a Canon EOS adapter from a marine battery. Quite a few D.P.'s are interested/currently using the D/SLR cameras for time lapse, however many guys (including my mentor) are distrustful of the short life of the batteries on the cameras and are dead set on never using them until they can connect a marine battery to them via XLR connector. A recent issue of American Cinematograher (earlier this year sometime) talks about a documentary that used a Digital Rebel for timelapse in addition to S16mm and 35mm aquisition and they cut well together. There are many film equipment rental houses who could push them for you. Just an idea.
 
Brian, I am not sure what voltage the LCD monitor expects. If it is 12V, than you are all set. The converter has 2 12V inputs, one XLR 4 pin, another is a regular DC input (2.1 mm) jack. They both are connected, so once you plug in the 12V XLR cable, the jack has 12V on it. You would use a short cable connecting the monitor to the jack.
As far as Canon EOS cameras, do you know what voltage they need? Our converter can be easily set to any voltage below 10V.
 
You can't plug that xlr into the camera can you?

You can't plug that xlr into the camera can you?

Hey I like those units you are making. I'll likely pick one up soon. The question I have is if you are using an xlr jack for the power what's to stop some buddy from plugging the thing directly into the cameras xlr outlets. That's something I would do in a dark theater.

Mike
 
You would have to be able to jam a 4 pin XLR plug (power connection industry standard) into a 3 pin audio jack :-)
 
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