Diagram Of A Digital Camera The Topic Of My Proj. Is Digital Counters.any Website Where I Can Find A Block Diagram And Discription?

The topic of my proj. is digital counters.any website where i can find a block diagram and discription? - diagram of a digital camera

I really tried, but I could not clear and precise directions how these counters work and block diagrams. I'm an EE. Students and this project is the final draft of the "electric during the measurements.