AN-1001 Ambient Light Sensing Using GPAK
A light sensor is essentially a transistor whose base (B) is photosensitive. Photons of light are converted to electrons when they hit the transistor base which partially turns on the transistor allowing electrons to flow between the collector and emitter. The more light that hits the base the more the transistor will turn ON by lowering the resistance between the emitter and collector.
- AN-1001.zip- (537 KB)