Lastly, if you look carefully, there is a small wire sticking out on top the box. It is attached to one of the digital input on the Arduino and when you touch it you get all the sensor readings on the screen. I thought it would be nice to have some troubleshooting build into it as ambient light may play havoc with the photoresistors and some thresholds may need to be adjusted. Another lesson I learned, don’t use semi-transparent PLA for photosensors (insert palm smack on the forehead here).
