In the 110 V network, capacitors of 200 V or more and in the 220 V network, capacitors of 400 V or more, can be tested in this simple circuit. The indication is given by a neon lamp.
With this circuit it is possible to use a DC buzzer (not a transducer) as an extension of the...
This circuit allows feeding a small semiconductor laser to obtain a useful resource for...
This circuit comes from a Gernsback Publications of the 90s. The circuit uses a general-purpose transistor as...