This circuit was found in a 1966 General Electric book. The triac and the day are from that time and can be replaced by modern equivalents depending on the load.
August 2017 - Texas Instruments is making available through Mouser Electronics the new integrated...
This circuit was found in a 90s EDN. In it we have the use of LEDs and diodes to stabilize the supply...
August 2017 - Mouser Electronics already has to supply the new Darlington MAAM-011206 Broadband...