Found in a 90s 303 Circuits, this circuit uses the KTY10 sensor, widely used at the time.
This good gain antenna up to 30 MHz was found in an American 1990s documentation. The circuit can be...
This circuit keeps an LED on briefly when S1 is pressed. The time depends on C1. The circuit is...
This circuit was found in the September 1992 issue of Radio Electronics magazine. The circuit does...