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 pocket-sized VHF receiver was found in Radio Electronics magazine from January 1961. It uses...
Found in 1980s documentation, this oscillator uses an integrated TTL Schottly. The supply must be...
The transistors of this circuit may be the BC548 or BC549 and its power supply can be performed...