<> If the problem is fast sneaky pulses, how do I detect this? What's the <> easiest way and, barring that, what's the most effective way even if it <> difficult? <<> Anthony Clifton - Wirehead Cheat, lift (bend) the D input pin so it's not in the socket and pull it up to +5v through a resistor (1k-or most anything). lacking that let it float unconnected and see what the output does. Guarentees a logic one in and Q=1 out. Allison