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.
August 2016 - It can be obtained from Mouser Electronics the power factor controller NCP1602 from...
Found in American documentation from the 70s, this circuit uses components of the time, uncommon...
September 2017 - Microchip is making available through Mouser Electronics the ARM Cortex® M +...