or you can buy an off-the-shelf RGB sensor and wire it up to an Arduino. Or you can go back to basics and build this reflective RGB sensor from an LED and a photocell. The principle behind ...

Let's link things together and make a real-time plot. Putting kst and Arduino Together Figure 4 shows the circuit required to read the photocell and hook up the Dallas DS18B20 one-wire temperature ...

There’s hardly a day that passes without an Arduino project that spurs the usual ... seen “bang-bang” line followers that just use a photocell to turn the robot one way or the other.