This LED special effects circuit was found in the February 1992 Radio Electronics magazine. The circuit uses 4 LEDs and is controlled by R3.
This simple version of a function generator with the XR2206 was found in the May 1977 issue of...
We found this circuit in Radio Electronics magazine from June 1960. The four-transistor circuit is...
This circuit is one of many that can be found in this section using the 555. This circuit was...