Power Supply

Most reprap electronics use 12Vdc ranging from 5A-20A

hot beds themselves can use 5A-15A

there a couple different options of power supply that can be used.

switching

can be purchased for a specific input and output

http://en.wikipedia.org/wiki/Switched-mode_power_supply

RepRapPro_Mendel_power_supply

computer

a type of switch mode power supply

computers use various voltages and include many different plugs. they are easy to find but need to select correct wires.

• PCPowerSupply using a computer power supply

brick

limited by amps but is a simple option

http://www.thingiverse.com/thing:13980

see also

http://en.wikipedia.org/wiki/Power_supply