$57.99 Amazon.com: AC/DC Adapter - DC 12V 1A Power Supply 1000mA, 100~240V AC to DC 12 Volt 1 Amp 0.6A Converter with 5.5 x 2.5mm 2.1mm Plug for Security Camera DVR NVR Surveillance
Amazon.com: 12 Volt Power Supply - 3.5 Amp Standard (12V 3.5A DC) Adapter : Electronics
Simple 12V 3A Power Supply Circuit
