This circuit generates frequencies determined by R3 and C1. We found it in the Radio Electronics magazine of May 1988. The power supply must be symmetrical.
This circuit was found in the September 1976 issue of Radio Electronics magazine. The circuit is...
This wireless infrared remote sound transmitter is from an article published in the August 1988...
This shield circuit for lamps and other charges was found in a Popular Electronics from the 90's....