![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
![Amazon.com: VL53L0X Time-of-Flight Distance Sensor Flight Measurement ToF Laser Range Finder 940nm Laser Detect Module for Arduino (Pack of 2) : Electronics Amazon.com: VL53L0X Time-of-Flight Distance Sensor Flight Measurement ToF Laser Range Finder 940nm Laser Detect Module for Arduino (Pack of 2) : Electronics](https://m.media-amazon.com/images/S/aplus-media-library-service-media/4070de94-2029-493c-86cb-0c781fbe3d51.__CR0,0,970,600_PT0_SX970_V1___.png)
Amazon.com: VL53L0X Time-of-Flight Distance Sensor Flight Measurement ToF Laser Range Finder 940nm Laser Detect Module for Arduino (Pack of 2) : Electronics
![5 PCS Light Sensor Module, Icstation 5V Laser Receiver Sensor Module High Level Output Laser Receiver Arduino Work with Relay Switch, Non-Modulator: Amazon.com: Industrial & Scientific 5 PCS Light Sensor Module, Icstation 5V Laser Receiver Sensor Module High Level Output Laser Receiver Arduino Work with Relay Switch, Non-Modulator: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/61V635LuWHL._AC_UF1000,1000_QL80_.jpg)