Found in an Electronic Design and 1970s, this circuit uses transistors of the time. The transistors can be replaced with equivalents and the relay is 12 V depending on the power supply.
What differentiates this circuit from the previous one (CB12689E) is the non-need to use a...
The integrated circuit used in this application is the Texas Instruments LMV358A, a low voltage...
This circuit was found in a 90s Popular Electronics. The sensor can be any phototransistor. ...