This circuit was found in an Electronics Now from the 90's. The integrated regulator circuit and the power transistor must be equipped with heat radiators.
This circuit has both frequency and duty cycle control. We found it in the October 1992 Radio...
This circuit came out in a Frances Toute LÉlectronique magazine from July 1978, but can still be...
May 2016 - It can be obtained from Mouser Electronics new tricolors chipsLEDs from Broadcom for...