Bulky “wall-warts” using those heavy square transformers are so yesterday. We carry a variety of really nice power adapters using switch-mode power supplies. They are light, efficient, and fit sideways in A/C sockets and power strips so they don’t take up any more room than a standard plug. They won’t block other outlets, so you can plug multiple adapters into a single power strip.

The output is completely regulated supplying a steady 9 volts all the way up to a load of 1.0 amps. The DC plug fits standard 2.1mm x 5.5mm barrel jacks. The tip is positive. See our article – All About DC Barrel Jacks/Plugs for more information on compatibility.

The A/C plug on this adapter is for the US, but it is designed to work anywhere in the world, using 100V to 240V A/C wall voltages; a low cost plug adapter is the only thing needed.

This is the best adapter to use with your Arduino or other projects that have a built-in 5 volt power supply.

Wall Adapter, Switching Power Supply – 9 volts, 1 Amp by Provide Your Own is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.