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How to build an optical/light barrier with the Arduino, the Keyes laser module (KY-008) and a laser receiver/detector module - Michael Schoeffler
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Vl53l3cx Time-of-flight Tof Laser Ranging Sensor Module Breakout 3m 940nm Ir Laser Distance I2c Iic For Arduino Cjmcu-533 - Integrated Circuits - AliExpress
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How many IR receivers can I wire in parallel? - #76 by Grumpy_Mike - Project Guidance - Arduino Forum
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High Precision Laser Measure Sensor Module Laser Distance Sensor For Arduino Infrared Ranging Sensor Laser Range Finder Module - BeamQus
![altNOAA on Twitter: "@brabbit99 @TheMermaidsSong Need an IR laser like this one, a sensor that can detect it, and an Arduino Uno. Then mount everything up and use the Arduino to measure altNOAA on Twitter: "@brabbit99 @TheMermaidsSong Need an IR laser like this one, a sensor that can detect it, and an Arduino Uno. Then mount everything up and use the Arduino to measure](https://pbs.twimg.com/media/FubvYeYWAAE9bU4.jpg)
altNOAA on Twitter: "@brabbit99 @TheMermaidsSong Need an IR laser like this one, a sensor that can detect it, and an Arduino Uno. Then mount everything up and use the Arduino to measure
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