Found in a 303 Circuits from the 90s, this circuit converts signals from the 10 kHz to 150 kHz band to the 4.01 to 4.15 MHz band.
This circuit, found in 2002 documentation, triggers LEDs when a phone call is received. The LEDs...
This simple version of a function generator with the XR2206 was found in the May 1977 issue of...
A pulse triggers this 800 Hz horn for a time determined by capacitor C1. Powered by 5 V the...