[Jordan] managed to cobble together his own version of a low resolution digital ... an infrared photodiode inside of a tube. The diode is connected to an analog input pin on an Arduino.

Electronic engineers, developers and hobbyists looking for a fully featured Arduino Mega compatible ... It is equipped with 32 Inputs (16 x digital 4-30V, 8 x analog 0-10V, 4 x analog 0-5V ...

PixelSensor™ multispectral sensors use exclusive on-chip filtering to pack up to eight wavelength-selective photodiodes into < 1 cm2 for ... illumination and data acquisition through dual digital ...