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Freaduino AC UNO is an Arduino compatible board. The first arduino board support AC input.It's use a 680uF electrolytic capacitors for filtering. The AC UNO support 5V-9V AC and 7V-22V DC. Output recommends 500mA Max.
It is based on Arduino UNO Rev3 design. So you can use AC UNO as Arduino UNO Rev3 . All code, shield and IDE for Arduino UNO Rev3 are also valid on AC UNO. Some visible improvement on hardware make Freaduino UNO more flexible and easier to use.