This interesting transistor circuit has several effects and an included amplifier. The circuit is monophonic and powered by standard batteries. The number of keys can be changed.
This mixer configuration with the 741 operational amplifier can be found on several other circuits in...
Touching the sensor with your fingers, this circuit produces a machine gun sound. The circuit must...
This 13.8 V power supply with 10 A was found in a 1997 documentation. It is intended for the...