Arduino Products. Browse the full range of official Arduino products, including Boards, Modules (a smaller form-factor of classic boards), Shields (elements that can be plugged onto a board to give it extra features), and Kits. If you are wondering if your Arduino product is authentic you can learn how to spot a counterfeit board here.
· Current Measurement Methods. There are two main ways to measure current – one is based on electromagnetics and is associated with the early moving coil (d’Arsonval) meter, and the other is based on the main theory of electricity, Ohm’s law. D’Arsonval Meter/Galvanometer.