A small optical beam-break detector that's easy to interface to an Arduino or similar.Sold By WillTronics
These are small beam-break modules, about 30 years old, originally used in (my best guess) vending machines. They are open-collector output, and as such are extraordinarily easy to interface to an ...Read More…
These are small beam-break modules, about 30 years old, originally used in (my best guess) vending machines. They are open-collector output, and as such are extraordinarily easy to interface to an Arduino. Simply connect 5V or 3.3V, GND, and the output to a digital input pin on your Arduino. Set the mode of that input pin to INPUT_PULLUP. When the beam is broken, the pin will go HIGH. If the beam is not broken, it will be LOW.
Here's a diagram showing the dimensions and pinout of the board + beam break sensor.
I drew the dimensions shown above, and so I can give you a CAD model of the module upon request.
Please note: There are a couple colors of silkscreen that these were made with - yellow (bare FR4?) and green. I will send them randomly.
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