This interesting circuit with a neon lamp and a transistor was found in Radio Electronics magazine from February 1968. The transistor is a special type of high voltage at the time.
We found this code switch circuit in the January 1999 Electronics Now magazine. Some of the...
We found this circuit for musical instruments in the March 1992 Radio Electronics magazine. The...
This circuit was found in documentation from 1977. Its purpose is to diode-switch the frequency of a VFO....