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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Radiolocation antenna (CB6531E)
This antenna for the frequencies 146 or 440 MHz was found in a magazine 73 for Amateur Radio of...
High Voltage Electrolytic Capacitor Test (CB6885E)
This circuit, when connected to the 110 V power grid makes it possible to test capacitors with...
Limit Detector (CB5163E)
This two-input limit detector was found in an American 1980s documentation. The circuit can be...