I built this circuit with a computer program. Basically when the switch S1 is pressed to fast I get a high/low pulse coming through the latch which really messes up the output. ( Output will continually go from high to low rapidly) I was wondering if this will be present also if I was to build the circuit. It will be a pushbutton and may be pressed pretty fast. I put a 100k resistor and a 2.2uf cap in the circuit to try to stop problems from debouncing but I think the problem is that there is just not enough time to get the latch. If this will carry over to a real circuit please let me know if there is anything I can add to it to stop this. Thanks I cannot get this image to look good on this site you will have to save it and open it from windows picture and fax viewer.