What kind of time resolution are you looking for? microseconds or milliseconds? Chris Eddy Mr Kok Lau wrote: > Hi, > > I'm building a digital camera, and I need to send some synchronizing > signals to a CCD chip. And on top of that, the ADC that converts the > output signal from the CCD chip has it's own timing diagram as well. I > was thinking of using some form of shift registers which I can program.