This circuit produces a signal that has the waveform of the sound produced by or near the banjo. The circuit is from an 80's American documentation. The signal must come from an ordinary guitar.
This commercial transistor radio was manufactured in Japan in the 1960s. The circuit has only 3...
This useful signal injector using two transistor was found in a Radio Electronics Magazine from...
In the figure we have the way to control a flip-flop with the 4069 from positive pulses. The...