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Building and Testing an IR Light Gate


In this video, James shows a quick example of building and testing an IR light gate using an oscilloscope. With two resistors, an IR LED, and an IR phototransistor, you can measure the speed of an object or the RPM of a motor.

This example uses a PicoScope 2000 Series Oscilloscope. Check out the full video on our YouTube channel, or find out more about the PicoScope 2000 Series.