homemade speed controlllers (for school project)

[Denman]

Hi again all

an update
I decided to make something easier for my school project, however there is a couple of people from the lower year who would like to make a couple, for this event. http://www.extremefightingmachines.c...cambridge.html
Basically we don't wnat to use any of the first equipment due to how expensive and precious it is, so we will be using a remote controlled car reciever, and a couple of home made speed controllers. The reciever gives out a pwm output to whatever it drives, and we used it beforein a previous featherweight, but with 2 victors.
So firstly, we need to decide how much current and what motors etc it will drive. They will most probably be window screen wiper motors, from a local junkyard. Anyone who would like to help and suggest stuff is most welcome, and it would be great to see a FIRST team thrash the destruction style teams
Denman