This circuit with a voltage comparator is delayed by the capacitor. The circuit drives a power transistor that must be equipped with a good heat sink.
This useful circuit is used to test the insulation of cables, appliances, leaks in high voltage...
This circuit is from a publication from the 50's. Inductive components are critical, and...
Found in old documentation, this fuzz uses the 741 Operational Amplifier. Assembly is simple, but...