9V 1A Power Supply Unit – DC Adapter with Barrel Jack

The 9V 1A PSU is a regulated DC power adapter designed for powering microcontrollers, development boards, and small electronics projects. It provides a stable 9-volt output at up to 1 ampere, making it suitable for Arduino boards, breadboard circuits, and sensor modules. The reliable power delivery ensures consistent performance without voltage spikes.

Key Specifications

What You Can Build With This

• Arduino Uno-powered weather station
• Breadboard prototype for motion sensor alarm
• Desktop IoT monitor with ESP8266
• Portable electronic display board

Compatibility

This power supply is compatible with any device requiring 9V DC and a 2.1mm center-positive barrel jack. It works directly with Arduino Uno and Mega boards via the DC jack, as well as with most breadboard power modules. For lower voltage boards like 3.3V or 5V systems, use a suitable voltage regulator.

Wiring Notes

The barrel jack uses a standard 2.1mm inner diameter with center positive. Connect the adapter output to your board's DC input jack; no additional wiring is needed for Arduino. For custom circuits, wire the positive to your voltage rail and negative to ground, ensuring the total current draw does not exceed 1A.

Why Buy from Compoden

Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.