Originally Posted by nomadking

Often they use a USB type connection for the power supply. A phone or tablet computer charger should do. Even where it isn't a USB type power connection, you can get power cables that plug into a USB type power source. If you use a multi-way USB output device, it can simplify the number of PSUs required. Eg rather than having 4 PSUs plugged in, a single 4 way USB power source could do it instead.