Arduino Light Sensor Shield
This is a working arduino light sensor shield that requires a 3 - 3.6 volt LED and an inexpensive photoresistor (can be calibrated) to operate. The circuits are 3D printed with Functionalize F-Electric Filament, the world's most conductive 3D filament. More informatino and filament available at: http://functionalize.com/tips-and-designs-for-3d-printing-electronics-with-f-electric/