This circuit was found in a Signetics documentation from the 1980s. The integrated is a PLL and the SCR is a general purpose type The pitch frequency is given by R1 and C1 as formula next to the diagram.
This dimmer for incandescent lamps was obtained from an American 1990s documentation. The circuit...
March 2017 - The integrated circuit division of IXYS is presented the integrated relay that makes...
September 2016 - It can be obtained from Mouser Electronics coils for inductive battery chargers...