This could be an interesting one if you work with robotics, flagged by the Arduino team – a look at how to smooth the operation of a servo, to avoid jerking between positions. It’s from the YouTuber ...

An Arduino can be used to test the life of any battery with less than 5 volts, Boxall says. So, for a quick way to see how much juice your AAA, AA, C, or D batteries have left, build this ...