We found this circuit in the October 1996 Electronics Now magazine. The circuit uses LDRs as sensors and drives relays. The relays must have voltages according to the power supply.
This circuit was found in Philips documentation from 1965. No information was given about the...
This circuit was found in a 1977 publication, but it can be easily assembled, although unijunction...
The circuit that we give below has two possible applications: it can be used to control a lamp...