RC car mosfet speed control

Hi, I am building up a model rc car and need an electronic speed control for it. Does anyone know of a design or where I can find one using mosfets for controlling the speed?

I am building the Nissan 350Z car. :shock:

Thanks.

mike,

Here are a couple of projects:
**broken link removed**
http://www.geocities.com/tonypsi/

And here is some theory on speed controllers.
**broken link removed**

Good luck!

Ante :roll:

mikesmixes said:

Hi, I am building up a model rc car and need an electronic speed control for it. Does anyone know of a design or where I can find one using mosfets for controlling the speed?

I am building the Nissan 350Z car. :shock:

Thanks.

Click to expand...

Commercial ones are very small, and available at reasonable cost (probably cheaper than you could buy the parts for). They commonly use a number of MOSFET's in parallel to handle the high currents involved, 90-100A being quite normal. Paralleling more MOSFET's also reduces the total resistance, so provides more voltage to the motor as well - generally the more expensive controllers simply parallel more MOSFET's.