Circuit Project Electronic

The circuit presented on this page attemps to be an interface to convert pulses such as provided by a Basic Stamp or R/C receiver to a dual PWM(Pulse Width Modulation) signal required by an H-bridge. The simplest circuit would use a small microcontroller like a PIC. This circuit takes a more traditional approach. Many experimenters will have all the parts already. Total parts cost should be equal to a simple espresso drink, although I have stopped drinking coffee I still remember how much it costs.

Read more original source:
http://www.bobblick.com/techref/projects/sv2pwm/sv2pwm.html