This simple circuit is intended to test the zener test. RV1 can be calibrated in terms of voltage. The maximum voltage of the tested zener is that used in the circuit supply.
This small power amplifier makes use of an output transformer given its design time. In fact, the...
This circuit is from a 1993 Italian magazine, but it can be easily assembled today. For 110 V,...
This two-way switch or control shows how to control a lamp from two points. This version is from a...