LM2596S DC-DC Adjustable Step-Down (Buck) Converter Module – 3A

Stop wasting power as heat! If you need to power a 5V Arduino from a 12V battery, old linear regulators get incredibly hot and waste energy. The LM2596 “Buck” converter solves this by switching power efficiently (up to 92%). It features a precision brass screw (potentiometer) that lets you dial in the exact voltage you need. Whether you are building a custom lab power supply or running sensitive 3.3V sensors from a car battery, this module handles it with ease.