This circuit is based on the light comparison of two LDR sensors. We found it in a 90s Popular Electronics. The transistor must be according to the indicator or load being driven.
This circuit was obtained from a 90s Radio Electronics. The integrated circuit used HAA11508 is not...
This article was written by A. Fanzeres in the 1970s. We kept the original text. With the circuit we...
We found this circuit in an English publication in 1991. The circuit can be assembled with...