The presented circuit uses an opto-SCR. We found the circuit in the GE semiconductor manual. Equivalent triacs, depending on the load current and voltage, can be used.
Found in Electronics now, this circuit generates signals given by the formulas next to the...
This circuit was found in an old manual of linear integrated circuits of the 80's. Equivalent...
This circuit activates an incandescent lamp (or LEDs) when the light stops hitting the sensor, which...