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 flasher circuit was found in Radio Electronics from the 90s. The circuit must be powered by a...
This circuit has a sensitivity of 2uW. We found it in documentation from the 1980s. The integrated...
Found in Popular Electronics from the 90s, this circuit reaches a few tens of megahertz. L1, C1...