This conventional 4 channel circuit with the 4017 and 555 was found in the November 1991 Radio Electronics magazine. The potentiometer can be 47k and it controls the speed of the effect.
This silencer or squelch preamp circuit was found in a documentation for radio amateurs. It...
This circuit was found in a 1994 publication. It draws 1 of 41 LEDs when we press and then release...
This circuit makes use of a diac to stop the activation of a sensitive reed relay 1 mA. The trip...