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.
The maximum frequency of the oscillator shown in the figure is around 3 MHz. The trimmer adjusts the...
This circuit was sent by our collaborator Adriano Muniz Moura from Pirapora – PG. The transmitter...
This sensitive millivoltmeter for alternating voltages was found in a French publication in 1996...