I have 2 wheelchair motors and each is 24v 3-4amps. I'm going to make probably a cart to sit on and see how fast i can gear these things... all controlled with a wii nunchuck.
This mosfet would be fine right? http://www.rigelcorp.com/__doc/8051/IRF510.pdf and the max would be 5.6amp @ 100v?
and to get both directions I'd put two mosfets per motor. the mosfets would be in opposite directions, and a diode to protect the one that's off? and then to add a small capacitor on the motor's ends to protect the mosfets from feedback
so total = 4 mosfets, 2 per motor. and just pulse them at a high speed to control speed?
i was also thinking about putting all the mosfets on an old video card heatsink, then add a thermo resistor... and set it so if temp is over like 50C turn on the fan.. if temp over 90C turn off mosfets