“An Arduino has a number of analog inputs, which enables us to measure parameters in the analog domain. This could be a voltage, current, resistance, temperature, light and so on. This article explores the usage and performance of the analog to digital converter (ADC) on the Arduino. The tests are performed on an Arduino Nano v3.0 which is very similar to the Arduino Uno with the most notable difference its size. Also the microcontroller ATMEGA328 on board is the same and runs at a clock frequency of 16 MHz.”