Using a standard multimeter, this circuit from a 73 magazine for radio amateurs provides an output proportional to the inductance under test. The circuit is TTL and must be powered with 5 V.
This small blocking oscillator for approximately 1000 Hz was found in an American documentation from the...
This isolated solid state relay can function as a shield directly controlling 10 A loads. The...
This circuit was found in a 1974 publication. It converts the applied voltage into pulses of...