Any high-gain Darlington transistor can be used on this touch circuit. The load can be formed by LEDs and the power supply isolated from the power grid.
Found in a September 1992 Radio Electronics magazine article, this circuit generates a pulse as...
This circuit consists of a charge pump with positive input and negative output. We find it in a...
Unlike the previous circuit, which is an inverter type, this one is non-inverting. The circuit...