This 12 V to 110 V inverter with 100 W was found in a 1977 Signetics manual. The transformer must be rated according to the desired power and the output transistors admit equivalents.
This is the basic configuration of an operational amplifier as a current regulator. We found it in...
This traditional dimmer configuration with SCRs, but with full wave control was found in a 1988...
In this circuit from a 1991 publication, we can use the 2N2646 unijunction transistor and the...