Tinkerkit modular prototyping system tinkerkit t000070 a hall sensor from the tinkerkit range that when connected via a tinkerkit shield to an arduino board outputs a voltage proportional to the detected magnetic field around the sensor the sensor can be used to detect electrical fields or even biologically generated magnetic fields such as a human body or animal the hall sensor is mounted on a standard tinkerkit board that also contains a signal amplifier and led indicators arduino ti