Accelerated Flashing LEDs with 4017 (CB25436E)

This LED special effects circuit was found in the February 1992 Radio Electronics magazine. The circuit uses 4 LEDs and is controlled by R3.

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Basic Voltmeter (CB391E)
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Reinartz Oscillator (CB25318E)
The coils determine the frequency of this oscillator that we found in the January 1996 issue of...
Dolby noise reducer (CB21105E)
This circuit was found in a National Semiconductor Handbook from the 1990s. The integrated circuit...