Arduino VIN Pin: Voltage Limits & Power Circuit Guide

Arduino VIN Pin Voltage Limits and Power Circuits

 The Arduino VIN pin is the raw positive external voltage input header that feeds directly into the board’s onboard linear voltage regulator circuit. It accepts unregulated DC power between 7V and 12V, powers embedded ATmega microcontrollers when disconnected from USB, and must never receive unregulated voltages exceeding 20V to prevent thermal regulator burnout. The […]