The transistor used in this circuit is uncommon today. AC124 or equivalent such as AC188K and 2N2431 can be used. The circuit is from the 80's and makes use of transformers.
This circuit was published in an article in Electronics Now magazine in October 1995. The circuit...
This circuit, for ordinary incandescent lamps, allows you to adjust the lighting level in 2...
July 2017 - Ricoh's new 200mA R1524x voltage regulators are available from Mouser Electronics with...