This guitar effect circuit was found in a 2002 documentation. The circuit can be powered by a 9 V battery as it has low consumption. The connections of the input and output audio signals must be shielded.
This alarm uses several sensors that directly trigger a sensitive relay. A larger relay can be...
This circuit for counting down pulses was found in the September 1983 issue of Radio Electronics...
Indicated by Popular Electronics to be used with a car headlight, this circuit can also have...