Re: New guy...intro and question [TANKS]

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

Derek Engelhaupt wrote:
>     Since my main drive system
>     will be EV Warriors running at 24V powered by SLA batteries, I was
>     wondering if these ESC's would be damaged by running SLA's instead
>     of NiCd's?  They specify NiCd's.  I was planning on tapping 12V from
>     one battery in the 24V system.

When an ESC spec says that it only supports 7-8 cells, it really means 
that it supports 8.4 - 9.6 volts (each nicad cell is 1.2v).  Therefore, 
if you try to operate a 12v load with them there is a good chance that 
you'll fry the electronics.  You'll need an ESC that is rated for 12+ 
volt operation or you'll need to tap off less voltage from your 24v 
drive batteries using a basic voltage regulator or a voltage divider 
circuit (two resistors with the proper ratio and amp capacity).  Or, 
simply use a separate battery for the rotate since most rotate motors 
don't draw a lot of current, a nicad pack should do the trick.

        Frank P.