This dimmer for incandescent lamps using triac and an LF7237 IC was found in May 1985 Radio Electronics magazine. The circuit supports extension buttons.
This circuit compensates for the brightness of an LED as a function of temperature. We found it in...
This very sensitive circuit works almost like an electroscope. The FET can be the BF245 and it...
Constant currents from 10 mA to 1 A can supply the load, depending on the selection made by S1. Q1...