Or you can go back to basics and build this reflective RGB sensor from an LED and a photocell. The principle behind [TechMartian]’s approach is simplicity itself: shine different colored lights ...

This library (with examples) is designed to be integrated in projects using any kind of photocell to retrieve the light intensity (in Lux or footcandles). It handles the GL55xx photocell series but ...

It is not magic…it’s science! How does it work? Light from an object makes its way to a sensor (see figure 1) in a camera. On the sensor there are millions of cells called photocells. Each photocell ...

Add a teeny analog light sensor, the ALS PT19 analog light sensor is a great way to upgrade a project that uses a photocell and needs RoHS compliance. Due to the high rejection ratio of infrared ...

Or you can go back to basics and build this reflective RGB sensor from an LED and a photocell. The principle behind [TechMartian]’s approach is simplicity itself: shine different colored lights ...