This circuit was found in an American 1990s documentation. It can directly trigger a triac when light is detected by the sensor. The integrated circuit is common, like the 741.
I found this circuit in an English magazine from July 1982. The circuit is still viable because all...
This 75 W power supply was found in American documentation from the 1980s. Transistors can be...
This simple transistor amplifier is from 1982 documentation. The output transistor must be mounted on...