This fuzz effect for guitars was found in an American 1980s documentation. The transistors may be the BC549 and should be battery powered for noise sensitivity. Diodes are commonly used.
The frequency of this circuit can be varied from zero. The circuit uses the CMOS 4046 and was...
This audio amplifier circuit is from Ibrape's technical documentation from the 70's. The BC177 can be...
This simple circuit has three electrodes that indicate the level using mercury in a small...