This is another sampling and holding circuit found in a factory manual from the 1980s. The circuit can be implemented with more modern components. The FET is not a common component today.
Found in an Electronics World of 1969, this circuit generates 400 Hz signals. The coil must have 3 H...
The quiescent current of the small transmitter is around 20 mA. The transmission frequency depends on...
Vox or sonic switch is a relay activated by the voice or any sound picked up by the microphone. This...