Please help me! Power Supply

I'm doing project to graduate.I'm not sure power for my 3D Printer. I use RAMPS 1.4.
Power for Arduino ? ( 7-12V 1A Ok ?)
Power for RAMPS 5A ? ( 12V Ok ?)
Power for Hot-end ? ( I don't know )
Thanks you

The 5A terminals will power everything except the hot bed, which is on the 11A terminals, so just put 12V on both sets of terminals.

if you are not using a heated bed, you only need to connect power to number 2 (12v is ideal) as long as D1 is installed under the X-Y drivers. If there is no diode under there then 7-12v plugged into 1 will power the arduino fine.

The hot end connects to number 3 and is powered via a mosfet from 2.

The following link may explain things a bit better
[reprap.org]

@ lazzymonk:
I have not heated bed.
number 3 is connected with hot-end . Why do you say it isn't necessary.
Thanks

You do not need to power the arduino directly if D1 is installed. It supplies power to the arduino from the ramps power connector (2 in your picture)

please do not dual post issues! it just crowds the forum,

refer to your other post here:

[forums.reprap.org]

as a side note. d1 is to power the board if you are using sd card. if you want to power more than 12v you need to remove d1, and find another 5v source to power arduino board. there are issues of d1 being installed and more than 12 v causing comm issues.

It is all there in the ramps wiki. it may be overwhelming but read thru it a couple times. ramps is very well documented.