The 1: 1 transformer on this circuit found in a 1967 Electronics World can be wrapped around a small ferrite rod. The circuit operates with 600 to 6 000 Hz control signals.
This circuit, which may have other applications, trips a load if the voltage on the telephone line...
This UHV generator circuit or ultra-high voltage was found in a 90s Electronic Engineering 90s. The triac...
This circuit is from an old American documentation from the 70s. Transistor 2N3904 can be replaced by...