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.
The gain of this circuit is given by the value of R1 that depends on the current in the...
The circuit presented uses Linear Technology Operationals, having been found in a 1993 manual. The...
The light effect obtained with the circuit shown in figure 6 is different from the others: it...