This distorter for musical instruments was found in a 80’s Hands On Electronics. The transistor can be any general purpose and the components can be changed to modify the effects.
The figure shows how to implement an alarm buzzer in an LM3914 to warn about crossing the scale...
This circuit can act as a shield being controlled by a microcontroller by pin 1 or 2. The...
This circuit was obtained from a 1980's QST magazine. The circuit can generate 1 to 15 MHz signals...