This circuit interrupts the power supply when grounding is missing. The circuit is from an old documentation (from the 80's) using current transformers and other components of the time.
This circuit has both frequency and duty cycle control. We found it in the October 1992 Radio...
This circuit uses the 7493 to divide a TTL square signal by 8. The circuit must be powered from a...
This circuit is basically the same configuration as the previous one with a power stage with...