This circuit was found in 1960s Radio Electronics. The circuit uses components from that time. The triac is according to the controlled load. The sensor is a common LDR.
We found this circuit in the 1957 Raytheon transistor application manual. The transistor can be a...
This circuit was obtained in 1974. It serves to indicate the tuning of stations on a common...
The circuit presented, from 2006, serves to control loads at a distance, robots, etc. It can be...