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Old Apr 14, 2014, 05:06 PM
Registered User
Joined Nov 2013
11 Posts
12V Power Supply for Cam/TX

Hi there,

i'm building a FPV rig for my RClogger eye one xtreme quadcopter and i need an advice on which stepup module to use for power conversion (2s to "clean" 12V).
Cam is a CMQ1993X CCD and TX is a 250mw 5.8 gHz Fatshark.
The rig is as good as finished, but i never got to fly the quad because i toasted the rx before the first flight.

The quad runs on 2s (actually 2x 1s), the cam needs 12V.
I'm using this adapter cable to get 2s from the lipo http://www.rc-connectors.com/index.p...roducts_id=462

To get 12V out of this 2s system i bought this stepup module: http://www.ebay.at/itm/350385882425?...84.m1497.l2649

It is quiete heavy with 10 grams, and also pretty large, but it works.
If i plug in the lipo with everything wired up i get a nice and clean signal on my fatshark dominators.
Thats with the motors not running!

The question is, will the 12V stepup module i use give me a "clean" 12V even when the motors and everything is running?
Even without adding a ferrite ring or something like that?
I think before i bought the module i read that it kind of worked without anything else, but i could not try it myself since i'm still waiting for the new RX for the quad.

Another question would be if this would have been enough for my setup: http://www.readymaderc.com/store/ind...oducts_id=1554
This one only weights 0.5 grams and is very small.
I would save about 10 grams if i could just use the pololu module.
That would be great, but does the pololu put out "clean" 12V even when the motors are running and the lipo is getting stressed?

And while we're at it, can anybody tell me how much "mAh" and how many "A" or "mA" a typical 12V CCD cam and a 250mw 5.8ghz TX draw when running?
That would be interesting because i'm trying to figure out how long i will be able to stay in the air with that 80g FPV rig and a 1150 mAh lipo.

Thanks a lot for you input!
Chris.Z is offline Find More Posts by Chris.Z
Last edited by Chris.Z; Apr 14, 2014 at 05:07 PM. Reason: Added another question.
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Old Apr 14, 2014, 05:50 PM
Registered User
United States, MD, Stevensville
Joined Jun 2013
1,424 Posts
The RMRC Pololu step up works great and made for fpv applications. That being said you still have to use good or best practices with filtering and proper wiring as well as placement and antenna choice for best performance.
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