Here`s how you can make an electronic speed controler (ESC) for your remote control car, boat or even an airplane using an old servo and some MOSFETS. Please note that this ESC has a very limited control range. Meanining that it will act almost like but better then a switch.
Choose from the following mosfets: IRF530 or IRL2203N.
When using more than one mosfet, use the same type (either IRF530 or IRL2203). Based on Mosfet by Fairchild Semiconductors. (Varies with manufacturer)
Note: IRL 2203N is a better mosfet for the u