* experiment: computation of acceleration due to gravity. need photo transistor + laser. The phototransistor detects change of state. * The phototransistor breakout comes from elab peers.com. It works ...

A digital camera has an array of sensors that captures light reflected or transmitted onto it. This build is something closer to a reverse camera – a single sensor that makes images on a matrix of ...

Add a description, image, and links to the arduino-phototransistor topic page so that developers can more easily learn about it.