This circuit is from a 1967 General Electric SCR manual. The circuit supports other SCRs depending on the power of the controlled load. The control is half wave.
The CK722 transistor used in this circuit is one of the first commercial types in the world. The...
This automatic dimmer for incandescent lamps was found in a European publication from the 1980s. The...
This traditional doubler configuration with the 555 can be found in other articles on the author’s site....