How to use a 3 pin photodiode - Sensors - Arduino Forum
Vishay Intertechnology BPW77NA Phototransistor Silicon Chip, NPN Transistor, Visible Light, 850 nm 3-Pin, 5.5 mm W x 6.15 mm H x 5.5 mm L (Pack of 2): Amazon.com: Industrial & Scientific
arduino uno - How do I use a 3 legged phototransistor? - Arduino Stack Exchange
Phototransistor : Construction, Circuit Diagram & Its Applications