http://ourworld.compuserve.com/homepages/Bill_Bowden/page7.htm#neon.gif The circuit I'm using is the first one, on the left, just feeding it a higher voltage is all. I'm using 10-20M and 0.1uF, but the RC values aren't critical. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist