It’s something [mircemk] demonstrates, with an Arduino-powered magnetic field strength meter that uses a UGN 3503U Hall effect device. The circuit is extremely simple, comprising the sensor ...

[Martyn] is restoring a 32-year-old Honda motorcycle, so when the ancient speedometer broke last year ... horror of driving 40 LEDs with a single Arduino, [Martyn] bit the bullet and got a ...

The Scratch Duino programming is based on the Arduino platform and comes supplied with a variety of magnetic mounted sensors that can be installed and removed with ease. The Scratch Duino robot ...