Hello , recently I have been looking for better pics to expand to. I found one it looks great but there's one problem: it has no internal oscillator , I dont know what type of oscillator to get or what mode I would run it under . Could somone please give me a few pointers in the right direction ? Thanks PIC : PIC18F452 Oscillator I was looking at: 40 Mhz Clock Oscillator - Would this go under external clock input mode ECIO ? what would happen if I put a 200MHz oscillator in (pic rated at 40Mhz) ? -- Jason White - Python and C++ Programmer -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist