We found this circuit in an Electronic Design from 1965. The 4-layer diode is an unusual component these days and can be used in its place with a diac.
This small circuit for the medium or short-wave range, depending on the coil, was found in a...
Pressure switches are used in this circuit that quickly turns off the supply of a load if...
This circuit will trigger an audible warning signal after the end of the pre-programmed timing. Using...