This static switch circuit appears elsewhere on this site from other sources. This was obtained from a Motorola documentation for 1968 power circuits. The Triac can be another according to the load.
This circuit was found in an American documentation from 1977. The circuit can be implemented with modern...
In this circuit the output voltage depends on the light that falls on the LDR, increasing when the...
This filter with the 741 op amp was found in the February 1995 Electronics Now magazine. The power...