This circuit was found in American documentation from 1966, but it can be assembled with a modern equivalent transistor. The circuit is based on a mechanical tuning fork with a coil feedback system.
This circuit uses the 7815 regulator to obtain a voltage for motor control num shield for PC. The...
This 12 V to 110 V inverter with 100 W was found in a 1977 Signetics manual. The transformer must...
This basic version of the timer with the 555 was found in documentation from the 1980s. The relay...