This LED special effects circuit was found in the February 1992 Radio Electronics magazine. The circuit uses 4 LEDs and is controlled by R3.
We found this circuit in an American documentation from the 80s. In it we have the way to control...
The use of a diac improves the performance of the two dimmers in the previous circuits. The...
This 3-component circuit uses an analog indicator. We found it in an old publication....