This converter or inverter uses components that are still common. The transformer is the type found in old tube equipment. The power transistors must be mounted on heat radiators.
This circuit for car engine spot adjustment was found in an 80's Radio Electronics. The circuit...
This circuit triggers a relay when it gets dark, thus enabling the lighting of fluorescent lamps, which...
This circuit that generates signals between 1.5 and 2 kHz was found in a documentation from the...