Hello, After 3 year of 68hc11 programming, i try to use PIC. After small projects, i want to connect an RPM sensor to known the rotation of a motor (for example). If you are information, web site or ... for info on a easy to build RPM sensor connected to a PIC thank to think of me ! For the momment i use PIC16c84. Thanks for your help ! Christophe Caen (Calvados) FRANCE.