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.
Joining the two inputs, with the 4011 we form a simple inverter as shown in the figure. The truth...
This circuit was suggested by Philips in an old publication. The coils, made with wire 14 to 16...
The audio amplifier integrated circuit used in this 1990 project is not very common today....