Picked at random: The SiLabs Si7210 [1] is a Hall effect magnetic sensors with 0.1% linearity and an I2C interface, no Arduino ADC to tame. The Si7210 tops out at 0.2T. Eval bords for the series ...

Arduino has announced four new Nano microcontroller-based boards that will be available for developers and makers in late July. ... (I/Os) and should not be used for connecting to 5V signals. ...

The output of the device is read by an Arduino Nano, which is hooked up to a string of WS2812B LEDs and a small OLED display. The LEDs display the bearing of magnetic north, ...