Found in na 1969 Electronics World, this circuit makes use of transistors of the time. Equivalent transistors can be used. The diodes can be 1N4004.
This circuit was found in a 1980s documentation, using a comparator from the time. The...
This circuit, found in a 1998 documentation, allows you to use your digital multimeter as a...
This circuit was obtained in a Motorola manual from 1978. We can use any triac and the coupler with...