DPRG mailing list archives: [DPRG] Motor backlash / Back EMF

Sat Jan 5 22:34:38 CST 2008

The Power Wheels turned robot Redcar made it to the end of the block and
back on its own power earlier this evening (being driven via a Play
Station controller).

However, whenever the steering motor makes an
adjustment the Atmel resets as soon as the motor shuts off.  The logic and
motors have separate batteries and the Atmel drives the motor via relays
controlled by an L293D.   Any methods for isolation?  Eric has recommended
a full motor controller but I'm hoping to avoid that if at all possible. 
Contact me at scottinthebooth at gmail.com and I'll send a wiring diagram but
its too big to attach to the list.

Scott