But why do you use a 555 anyway? You could take the timer1 for the long time periods without any external hardware. From: "Stephan Kotze" To: Sent: Sunday, December 19, 1999 12:31 PM > Thanks for the advice, I tried it and traced the problem back to the 555. > Boosting the voltage on the 555 to 6V solved the problem > > Thanks > Stephan