树莓派官方电源：
RS英国: http://uk.rs-online.com/web/p/plug-in-power-supply/9098135/
element14中国(e络盟): http://cn.element14.com/stontronics/t5875dv/psu-raspberry-pi-5v-2-5a-multi/dp/2520785
树莓派官方对电源电流的建议:
https://www.raspberrypi.org/help/faqs/#powerReqs
视频中改造的台达电源的型号: “ADP-15AH AC”
淘宝链接: https://item.taobao.com/item.htm?id=26747328124
