The Yocto-Light-V2 device is an USB ambiant light sensor (lux meter) which will allow you to you measure ambient light up to 65000 lux. Measurements can be directly read via USB or stored on the device internal flash for later retrieval when connected again by USB.
This module can be used in conjunction with a directional light source to create a light barrier, as it is very reactive. This device is a possible replacement for the Yocto-Light V1, which is not produced anymore. The other option is the Yocto-Light-V3, which is less reactive but whose light sensitivity spectrum better matches the human eye.
This circuit has been designed so that the sensor itself can be moved further away from the USB by a few meters: simply split the board into two parts and solder a 4-wire cable on the designated pads.
USB cables and enclosure to be ordered separately.