This circuit can be used to test crystals from 1 to 20 MHz and also has an output to measure their frequency. We found it in the November 1998 Electronics Now magazine.
This simple circuit uses a 200 µA galvanometer to measure voltages in three ranges. The circuit...
In this circuit we have the way to use a simple switch to control SCRs in a full wave system. The...
With this circuit it is possible to obtain a sinusoidal signal from a triangular signal. The...