Found in American documentation from the 1970s, this circuit can be designed based on a modern SCR, such as the TIC106. The SCR must be provided with a heat sink.
This interesting low current circuit uses only one diode to obtain a full wave rectified signal....
This circuit, from a 1988 documentation, makes successive actuation of the shower to control the...
Available at Mouser Electronics this component of Diodes Incorporated consists of a voltage...