Wall Adapter Power Supply - 9VDC, 650mA (Barrel Jack) Reviews

Get steady, predictable power for your electronics with this high-quality 9V, 650mA wall adapter power supply. Manufactured specifically for SparkFun, this switching "wall wart" ensures your circuits get exactly 9V of direct current. Because the output is fully regulated, you never have to worry about the dangerous 14V voltage spikes that are common in older unregulated supplies. Design and Connectivity This power supply is an excellent choice for any general-purpose electronics build that requires 650mA of current or less. Standard Connectivity: Features a 5.5x2.1mm center-positive barrel connector, making it incredibly easy to plug directly into compatible development boards or breadboard power adapters. Standard Input: Operates on a wide AC input range of 100 to 240VAC (50/60Hz), making it highly adaptable and ready to plug into standard wall outlets. Built-In Safeguards: Includes protections against inrush currents during cold starts to prevent hardware damage or blown internal fuses. If you are unsure what your specific project requires in terms of power, we highly recommend checking out our comprehensive How to Power a Project tutorial before making a final decision.