A small portable device featuring timer, clock, and calendar functions, equipped with a simple and functional interface and a truly long battery life.

For most people, calculators are cheap and simple devices used for little more than addition and the odd multiplication job.

If you wanted to build a robot that chased light, you might start thinking about Raspberry Pis, cameras, and off-the-shelf computer vision systems. However, it needn’t be so complex. [Ed] of ...