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 was suggested by Siliconix in a 1980s publication. The circuit uses components from the time...
This amplifier with two FETs in direct coupling (cascode) was found in a 90s Popular Electronics. The...
This circuit uses the 7815 regulator to obtain a voltage for motor control num shield for PC. The...