The YL-70 4-channel line tracker sensor provides easy line tracking because the associated YL-73 line sensor ... I quickly rigged up a crude one-channel touch-free toggle switch using an Arduino Uno.

This is usually mounted at the bottom of a line following robot chassis. This compact tracking sensor module ... This is the crude Arduino Sketch. This code lets Arduino acquire signals rendered by ...

After building devices that can read his home’s electricity usage, [Dave] set out to build something that could measure the other energy source to his house: his gas line. Rather than tapping ...