Using an LDR as a sensor and an operational amplifier this circuit was found in the Encyclopedia of Electronic Circuits volume 5 from 1995. The circuit triggers an optodiac.
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
This control was obtained in an old publication from 1985 and uses a triac, which today can be of...
This is the traditional configuration of an unregulated bridge rectified power source. The circuit...