This circuit generates a constant current given by R1. The load is on the high side of the feed (High Side). The circuit admits equivalent operationals and the source must be symmetrical.
This is a very simple continuity tester, powered by one or two batteries of any size. The...
Tone controls for audio applications can also be considered filters that must attenuate certain...
This simple neon alternating flashing circuit was found in an old American publication. The...