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...
This simple low-power circuit uses, in the original version of 1965, germanium transistors. The...
This circuit was found in a1980s Motorola documentation. The integrated circuit is from that time....