With a single LED on the scale, this voltmeter has low consumption. The circuit was found in the March 1992 issue of Radio Electronics magazine.
The purpose of this circuit is to emit infrared pulses. However, LEDs for visible light can also...
This circuit was obtained in old documentation, but it is valid for modern triacs that must be...
This alarm circuit with sensors in series was found in the Electronics Now magazine of June 1994....