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.
A non-sinusoidal 120 V voltage can be obtained with this circuit found in the December 1992 Radio...
This circuit is from an Electronics World of 1967. The described calculations can be applied to...
This version of triac control is from a 1968 documentation. The circuit uses components from the...