9V 1A Power Adaptor

Specification	Details
Input Voltage	100V - 240V AC (50/60Hz)
Output Voltage	9V DC
Output Current	1A (1000mA) Max
Connector Type	DC Barrel Jack (5.5mm x 2.1mm)
Polarity	Center Positive (+)
Efficiency	>85% (High Efficiency SMPS)

Price

₹ 80.51

(Tax included)

Barcode: 5478160

Product Description

The 9V 1A Power Adaptor is a compact and reliable switching-mode power supply (SMPS) designed to provide a steady DC voltage for low-power electronic applications. Unlike traditional heavy transformers, this modern SMPS adapter is lightweight and handles a wide range of input AC voltages, making it ideal for use in areas with fluctuating power. The 1-Ampere output is perfectly suited for powering development boards like the Arduino Uno, Mega, and Nano (via the Vin pin), as well as small DC motors, wireless modules, and electronic musical instruments. Its standard 5.5mm barrel jack ensures universal compatibility with the vast majority of DC-powered consumer electronics and prototyping hardware.

Key Features

Universal AC Input: Designed to work with global voltage standards (100V-240V), providing a consistent 9V output regardless of local power variations.
Integrated Protection: Built-in safeguards against short-circuits, over-voltage, and thermal overloads to protect both the adapter and your connected project.
Standard DC Connector: Uses the industry-standard 5.5mm outer diameter and 2.1mm inner diameter plug, fitting most DC sockets on breadboard power modules and microcontrollers.
Regulated DC Output: Provides a clean signal with low ripple noise, essential for maintaining accuracy in sensitive analog sensors and audio circuits.
Energy Efficient: Consumes minimal standby power and operates with high efficiency under load, staying cool during long-term use.

Technical Details

Cable Length: ~1 Meter.
Plug Style: 2-Pin Indian/Euro standard.
Case Material: High-grade Flame Retardant ABS Plastic.

Prototyping and Engineering Tips from Robogears

The "Thermal" Advantage: CRITICAL: When powering an Arduino Uno or Mega, the onboard 5V regulator must "drop" the excess voltage. Using a 9V adapter is much more efficient than using a 12V adapter, as it creates significantly less heat on the Arduino's regulator, extending the lifespan of your development board.
Center Positive Verification: While 95% of modern electronics are "Center Positive," some specialized audio equipment (like guitar pedals) may be "Center Negative." Always check the polarity symbol on your device's power input before plugging in to avoid irreversible electrical damage.
Current Consumption: A 1A adapter can power any device that requires up to 1000mA. If your project (including all sensors and motors) draws 500mA, this adapter will work perfectly and run cool. However, do not attempt to draw more than 1A, as the output voltage will drop and the adapter may shut down or overheat.
Secure Connection: If your DC jack feels loose, check if your device requires a 2.5mm ID (inner diameter) pin instead of the 2.1mm provided by this adapter. A 2.1mm plug will fit a 2.5mm socket but will result in an intermittent power connection.
Noise Suppression: If you are using this adapter for high-gain audio or sensitive radio projects, place a 100µF electrolytic capacitor and a 0.1µF ceramic capacitor in parallel across the power rails of your project to filter out any remaining high-frequency switching noise.

Package Includes

1 x 9V 1A DC Power Adaptor

Disclaimer: Indoor use only. Do not use in high-moisture environments. Ensure your device's total current draw does not exceed 1000mA. Unplug the adapter when not in use for extended periods to ensure maximum longevity. Always verify the center-pin polarity of your device before use.