The load of this circuit depends on the triac and the integrated circuit used is uncommon today. The circuit is from 80s documentation. The triac must have a heat sink.
In this circuit the capacitor under test is charged at switch position A and then discharged...
This is a common circuit in the 1990s, when experimental FM transmitters were in vogue. The...
Using a piezoelectric sensor of the time, this circuit was found in the February 1994 issue of...