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Female DC Power adapter - 2.1mm jack to screw terminal block : ID 368 : $2.00 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: TMEZON 12 Volt 2A Power Adapter Supply AC to DC 2.1mm X 5.5mm Plug 12v 2 Amp Power Supply, Wall Plug Extra Long 8 Foot Cord : Electronics
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ZOSI Power Supply Adapter and 4-Way Power Splitter Cable for Security Camera/DVR AC100-240-Volt to DC 12-Volt 2A US Plug AC-2AT4-US - The Home Depot
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