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 circuit was found in a 1980s document. The integrated circuit is from the time and the power...
This simple binary counter triggers two LEDs according to the number of pulses applied to the...
We found this circuit in a documentation from the 70s. The circuit uses amplifiers from the time,...