We found this circuit in an old documentation. Its purpose is to turn on warning lights when the vehicle in a garage touches or passes a sensing bar preventing it from hitting the wall.
In this phase shift circuit, the transistor can be any general-purpose transistor. The circuit is from...
This circuit was found in a 90s Popular Electronics. The integrated circuit used is similar to the 741....
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We found...