![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)
How to build an optical/light barrier with the Arduino, the Keyes laser module (KY-008) and a laser receiver/detector module - Michael Schoeffler
![Does anyone know how to wire up the KY-008 Laser Transmitter Module? - General Electronics - Arduino Forum Does anyone know how to wire up the KY-008 Laser Transmitter Module? - General Electronics - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/a/9/3/a93ec95bd4f1761cf5742cc940ec71d464558c78.jpeg)
Does anyone know how to wire up the KY-008 Laser Transmitter Module? - General Electronics - Arduino Forum
![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)