This circuit was found in a 1970s General Electric documentation. This circuit already used an emitting LED. The circuit operates at frequencies from 50 Hz to 50 kHz with short pulses
This circuit was found in a 90s American documentation from the 90s. The components are from that...
The purpose of this amplifier that we found in the Radio Electronics magazine of October 1952 is...
With the help of a signal generator, this circuit makes it possible to test inductors and...