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.
In the figure we have a very low current DC to DC converter using a 555. The circuit can have...
A divide-by-4 or two-bit binary counter can also be built using two flip-flops of the 4027 type as...
This circuit can be used as a buzzer from 3 different locations, allowing you to identify where it went...