At 05:25 PM 3/9/2000 -0600, you wrote: >Another thought -- how are you driving the relay? I assume you have a >bipolar or a MOSFET to drive the coil? You might be pulling too much >current thru the PIC pin if you're trying to drive it dirrectly or thru a >bipolar transistor. That's why I prefer MOSFETs, too lazy to compute >base current. 8-) I agree completely on FETs - one thing of note, though, I've seen inductive kickback spikes come back across the parasitic gate capacitance and nuke less durable gate drivers (like micro pins... :). So I'd say be sure to either make sure you've got any kickback spikes clamped off well or use some sort of drivers - I usually use a cheap PNP-NPN totem pole arrangement to buffer the PIC output - also provides faster drive to the gate... ND Holmes -------------------------------------------------------------------------- Nathan D. Holmes maverick@drgw.net, ndholmes@iastate.edu 122 Shepard #3 Box 328 Gilbert, IA 50105 Iowa State University - EE http://www.drgw.net/~maverick PH: 515-663-9368 "Unless a man has creativity and self-motivation, freedom is an irksome burden." -------------------------------------------------------------------------