It’s also a very handy thing to have when paragliding, which is why [mircemk] decided to build a hand-held version using the Arduino Nano ... sensor, buzzer, and the 9 V battery that powers ...

The base unit houses an Arduino board which polls the buttons to see which is pressed first. The LED on the appropriate buzzer box is illuminated so the players know who got in first. One special ...

A buzzer too goes off as a warning. There's also an Arduino board, motor shield, breadboard and a battery to power it all." Soil care, simplified tech Siri Reddy, 12, a student from Gopalan ...