Lon did and article in Nuts adn Volts in conjunction with Parallax titled Stamp-controlled High-power H-bridge. It was Column #52, in teh August 99 issue. Can anyone help me with this circuit a littl ebit? I realize it is old but I am interested in it. I hae it build but it doesn't work. I AM NOT using the Stamp with it yet. I am just connecting the appropriate pins to the + or - side of the chip power supply to simulate the Stamp. I have attached the article.