Guitar Distorsion Pedal (CB18205E)

This simple circuit with two transistors was found in a 1985 publication. The power can come from batteries or battery, as consumption is very low.

| Clique na imagem para ampliar |

Electronic Repellent (CB16654E)
This simple oscillator is yet another of the many versions of sonic insect repellent that we find...
4 to 20 MHz XTAL Oscillator (CB12705E)
The circuit in the figure operates at frequencies from 4 to 20 MHz and also uses a common junction FET...
Decade Counter (CB24584E)
This TTL counter was found in the April 1979 issue of Radio Electronics magazine. The circuit is...