This timer can control loads up to 240 W. We found it in a 1967 RCA documentation. The main components admit modern equivalents.
This circuit was obtained from an American publication from the 60's. The transistors are...
This circuit detects light variations using two LDRs as sensors. Operational amplifiers and...
Using the 555 this circuit was found in a Popular Electronics from the 90's. The circuit directly...