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Security-01 9V 1A Power Supply Adapter, DC Jack Center Positive, Plug 5.5mm x 2.1mm, for Arduino UNO, Nixie Tube Clock, Schwinn Elliptical Machine and more: Amazon.co.uk: Computers & Accessories
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9V 1.0A UK Replacement DC power supply adaptor with 2.1mm centre negative tip : Amazon.co.uk: Electronics & Photo
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