This circuit has a sensitivity of 2uW. We found it in documentation from the 1980s. The integrated circuit is from that time. Equivalents can be tried.
The load used in this experimental circuit is a small incandescent lamp but it can be replaced by...
This simple 10-position roulette circuit with the 4017 found a 1987 documentation. The circuit can...
This is a Serial In - Parallel Out or Serial Out [SIPO or SISO] shift register using the...