Re: About my battery setup ... [TANKS]

[Frank Pittelli <frank-at-rctankcombat.com>]

Marc en Wendy wrote:
> About my STuG: I noticed that the battery pack for the receiver (4 x 
> NiMh 2300 mAh cells) drains quite fast because the elevation servo is 
> constantly correcting the gun position whilst driving. So after approx. 
> 20 minutes I have to changes these batteries.

(1) Counter-balance the gun.

(2) Adjust the servo so it isn't hitting hard limits at either end

> Would it be a problem (in terms of noise) to hook the power lines from 
> the elevation servo up to the controller battery? With the capacity 
> of 7,2 Ah it's quite overrated for just the controller and the fans, so 
> this option would level the drain on all batteries. There is not much 
> room for a fourth battery, so I'd like to stick to the three I've 
> already got installed.

Driving a servo at 12volts is dicey ... may work, may fry.

We've been running receivers and servos at 7.2v for over a decade 
without any problem.  It makes the servos more powerful and you can use 
stock Nicad packs.  If you want to use your main batteries as a servo 
supply, you should get a simple voltage regulator circuit or BEC and 
drop the voltage down to 7.2v or 6v.

        Frank P.