With a 120 ohms resistor this circuit can also be used as a shield for 3.3 V output voltages. The circuit uses an opto-diac enabling the control of triacs connected to the power grid with total isolation.
The circuit shown in the figure on the right can be used on a data transfer bus with the use of an...
This circuit was found in a Popular Electronics from the 90s. The power source must be symmetrical...