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 circuit mutes a system when a phone call is received. The circuit is from a Radio Electronics from...
This circuit is from a 1967 publication. The configuration holds true for modern transistors having...
L1 is the secunday wound of a common power transformer with voltages between 6 and 12 V and...