This is the power step of the previous circuit. Output transistors must be mounted on good heat sinks. The circuit is from documentation from the 60s.
This is the traditional unregulated power supply configuration with full wave rectification. For currents...
This circuit turns on a lamp in the dusk and turn off in the down. Only incandescent lamps can be...
This dimmer or light control for incandescent light bulbs or even small heaters, is one of many...