Re: hot switches [TANKS]

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

mxlyons-at-cox.net wrote:
> The "half-moon" cam shown in
> http://www.rctankcombat.com/articles/speed-control/05MAGSideMounted.jpg
> is used to allow a servo to select forward, off or reverse using two
> SPDT microswitches with roller arms.  

You're half-right :-)  Although the photo above does show a "half-moon" 
plastic disk used to trip micro-switches, Chrys' approach uses a metal 
"half-moon" disk *AS* the switch.  That is, the current flows through 
the metal half-moon and the metal ball-bearing contacts he constructed. 
  An ingenious design that combines the servo and switch into one 
component for controlling two motors.

With a slight modification to reduce electrical resistance, his approach 
could work just fine for the 6Amp load required by his vehicle.  I'm not 
sure I'd try it for the 30+ Amp loads of an EV Warrior, unless you've 
got a really good CO2 cooling/fire-control system :-)

        Frank P.