CD4017: Electronic Schematic Examples

Sequential 10-output counter with LEDs

CD4017 decade counter driven by hand with a pushbutton. Each press moves the active output to the next LED (D1 to D10), and a second button clears the count back to zero. A classic way to see CMOS logic in action without an oscilloscope.

decade counter
sequencer
CMOS 4000
switch debounce
chaser lights