Ben Eater-Based Debug Clock Signal Generator Sent to Manufacture!
https://www.iaritech.com/post/ben-eater-based-debug-clock-signal-generator-sent-to-manufacture
This 2-layer PCB is based on the original debugging clock generator designed by Ben Eater. It can generate a 5v clock signal ranging from <1 second to about 1000 Hz using a dial, as well as single step the clock with a push button.