Whenever the 5V output from PIC is applied to relay, the microprocessor will run unexpectedly. If I put relay in a separated board, it's OK. I think the problem is the noise from the inductance of relay. Can anyone tell me how to eliminate this problem? Thank you. ________________________________________________________ NetZero - We believe in a FREE Internet. Shouldn't you? Get your FREE Internet Access and Email at http://www.netzero.net/download.html