Found in old American documentation, this circuit that can be used as a shield, activates two relays and a neon lamp with different voltages.
We found this oscillator in a publication for radio amateurs from the 70s. The circuit generates...
We found this circuit in a 1982 publication, but all the components used are still common in our...
We found this circuit in a 1976 technical documentation, but it can be assembled with modern...