This 1968 Mallory circuit uses an uncommon integrated circuit today. The circuit has a 30 to 20,000 Hz response with lower power and is powered by 12 V.
In this game, whoever tightens the sensors, which are metal bars or spent batteries, makes the...
This two input simple mixer uses two transistor and can b e upgraded to more inputs. Input...
This circuit is from a 1987 American publication called Electronics Handbook. The circuit can be...