Found in an old Popular Electronics this circuit appears in other variations on this site and in this section. It uses a 7-segment common anode LED display as an indicator.
Found in a 1968 Electronics World, this circuit uses components from the era. In this circuit, a...
This circuit was found in a 1987 publication. A 4017 sequentially counts time in steps set by...
This power supply can sources currents up to 22 A to a load. Voltage is 12 V and the transistor...