This circuit protects an operational amplifier with respect to both current and voltage. The circuit is from American documentation and can be applied to almost any operational.
This shield circuit was found in an American publication from the 80's. The triac is of low...
This effects circuit can be used with microphones or guitars. The circuit is from an American...
Published in Popular Electronics with the curious name of Obnoxious Noisemaker, this 1968 circuit...