Snap Circuits Science: Phototransistor Audible IR Detector
Tuesday, April 29, 2014 - 14:02
in Physics & Chemistry
In a previous article I wanted to know if I could use the recording medium from old floppy disk as an infrared (IR) filter to shoot infrared photography on an iPod. I built a simple IR detector using Snap Circuits to test how well the floppy disk would absorb visible light yet let infrared wavelengths pass through. In that circuit I used the photodiode Snap Circuits block (Infrared Receiver U24) as the infrared detector. Even though a photodiode was useful for building a simple IR detector, another electronic component that is often used to detect infrared light is the phototransistor. read more