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.
Found in an RF Design from the 90's this circuit is intended for crystals of less than 1 MHz....
In the figure we have a simple configuration with a general-purpose transistor for a 3-input...
This circuit was taken from old American documentation. The circuit provides pulses obtained from...