This circuit was obtained from HAM Radio magazine in an 80's issue. The FETs are types of the time and the frequency is determined by the crystal. The circuit operates at voltages from 3 to 9 V.
This simple musical instrument was obtained from a 1967 magazine. If the original transistors are...
This simple general-purpose transistor mixer was taken from an article in Electronics Now magazine in...
This circuit was found in the April 1993 Electronics Now magazine. With it, it is possible to...