Hans Blichfeldt wrote: > Yes, osc0--33k--100pf---gnd > osc1--47k--gnd Hang on a bit here! Are we talking PICs, such as the 16F84 or similar? If so, then 1} The oscillator pins are called OSC1 and OSC2 with OSC1 representing input to the PIC and OSC2 feedback to the crystal. 2} The phase shift/ drive limit resistor is in series with OSC2. 3} The capacitor shunts the crystal side of the resistor, not the chip. 4} Do you by some chance mean a 33pf cap and a 100 ohm resistor on OSC2 and a 47pf cap on OSC1? -- Cheers, Paul B.