This circuit has an accuracy of 1%. The components used must be precision as well. The input frequency range is 40 Hz to 10 kHz with the indicated components.
In the figure we have a constant current source for Shape Memory Alloy in wires or Alloy with...
This circuit is from an American documentation of 1975. The FET may be the BF245 and the relay is of...
This circuit, obtained from old documentation, doubles the frequency of the pulses applied to the...