Found in the May 1997 issue of Electronics Now, this circuit produces a variety of sound effects for your instrument. It can be used with acoustic and electric guitars.
Varactor diodes are our varicaps of today. This circuit for switching signals in an RF circuit was found...
This Hughes circuit is from 1968. Equivalent modern components can be used. The input impedance is...
This circuit digitally counts input pulses. The circuit from a November 1970 Radio Electronics uses...