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Ky-008 650nm Laser Sensor Module 6mm 5v 5mw Red Laser Dot Diode Copper Head For - Integrated Circuits - AliExpress
![How to build an optical/light barrier with the Arduino, the Keyes laser module (KY-008) and a laser receiver/detector module - Michael Schoeffler How to build an optical/light barrier with the Arduino, the Keyes laser module (KY-008) and a laser receiver/detector module - Michael Schoeffler](http://www.mschoeffler.de/wp-content/uploads/2017/01/detector_laser_picture.jpg)
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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Amazon.com: waveshare Laser Sensor Detector Module Receiver Transmitter Compatible Arduino AVR PIC STM32 Application for Obstacle Detection Pipeline Counter Smart Robot Obstacle-Avoiding Car : Electronics
![How to build an optical/light barrier with the Arduino, the Keyes laser module (KY-008) and a laser receiver/detector module - Michael Schoeffler How to build an optical/light barrier with the Arduino, the Keyes laser module (KY-008) and a laser receiver/detector module - Michael Schoeffler](https://mschoeffler.com/wp-content/uploads/2017/01/Laser_detector_schematic.jpg)