With this circuit, signals in the range of 10 kHz to 150 kHz can be received at close to 4 MHz from a shortwave receiver. The circuit is from a 303 Circuits from the 90s.
This small inverter uses the commutation of a motor's brushes to perform the conversion, working like...
Found in an American publication, this circuit applies to almost any operational amplifier. The power...
The circuit shown was found in a 1988 documentation, giving an indication of value in an...