Wall Power Adapter 9V
This UL-certified (file number QQGQ.E245650) AC-to-DC converter gives you an easy way to power your DC electronics project from an electrical socket. It uses a switching regulator to efficiently output up to 1A at a near-constant regulated 9VDC, even when no load is applied. The DC power cable is 5 ft (1.5 m) long and terminated with a center-positive, 5.5 × 2.1 mm barrel connector that works with the DC power adapter barrel jack. This particular adapter also works well with many Arduinos.
5 in stock (can be backordered)
Wall Power Adapter 9V from Pololu
|Maximum output current:||1A|
From the Arduino site:
Some Arduino boards like UNO, MEGA and DUE, come with an AC socket that can be used to power the boards and to supply additional voltage if needed. A power supply adapter that provides from 7 to 12V (Volts) of DC (Direct Current) is required. The adapter is plugged onto the wall socket and the other end goes directly onto the board’s AC socket…
The AC adapters are commonly available in retail stores for use with consumer products are often suitable, but make sure that it has the proper connector for plugging into the power socket on your Arduino board: 5.5mm diameter cylindrical plug with 2.1mm pin hole, and that provides Positive voltage on the inside pin hole and Negative (or common/ground) voltage on the outside cylindrical sleeve of the connector plug…”