This circuit was found in a Popular Electronics documentation from the 90s. It is possible to switch the frequency of an oscillator by voltage. The circuit can act as a shield.
This circuit is from 1986 documentation, being adaptable in radios of that time. The circuit uses the...
This circuit was found in an American documentation from 1970. We can increase the number of...
Found in a 303 Circuits from the 90s, this circuit converts signals from the 10 kHz to 150 kHz...