Uploaded October 2020 | Updated September 2026, 1 week ago

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Opto Couplers / Photo Transistors allow you to switch a load using your Arduino, whilst keeping your board completely isolated from the circuit being switched. More information and links below....

If you want to switch a load on a different voltage, or if it is a noisy switch (e.g. Relay Coil) then you may want to isolate your Arduino board to protect it from the load circuit. Opto-Couplers / Photo-Transistors allow you to do this without introducing a relay, keeping your footprint and power requirements low.

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Our Website:
visualmicro.com

How to Use an Optocoupler or Photo Transistor with Arduino:
visualmicro.com/page/How-to-Use-an-Optocoupler-or-Photo-Transistor-with-Arduino.aspx?source=CzSGBn0lzwo

Wiring Diagram:
visualmicro.com/pics/IC_OptoCoupler_Wiring.png

#Arduino #VisualStudio