This free app lets you play around with smartphone sensors you probably didn't know existed.

Of course, many different types of distance measuring sensors exist but not all sensors are the same. Each sensor has its own advantages and disadvantages. At its most basic level, a distance ...

A popular series of inexpensivedistance sensors integrates aninfrared emitting diode, a linearcharge-coupled-device array, and asignal-processing circuit in one unit.The output is a dc voltage, V S, ...