Does anyone have any clever ways to generate essentially random long intervals (between 1 and 30 minutes). I am already using Timer1 and the PWM module on a PIC16c65, but I think there is a lot of computing power and peripheral capacity left over. -tom ---------------------------------------------------------------------- tomss at ids.net - 401-861-2831 - 42 Forge Rd, Potowomut, RI 02818 USA