what psu do I need?

Question

I'm making an arcade machine. my screen takes 12v at 30 watts. I want it all to run off the wall, in aus we have 240v. what power supply should I use?

jw0752 · Accepted Answer

Hi Noah, The power supply puts out a voltage level, like 12 volts. The equipment that you hook up to it will draw the amount of amps that it needs. All you have to verify is that you do not hook up more things than the maximum rating of the power supply. If you look on the power supply it will give you the Volts and the Amps but the amps are only telling you the max that the supply can handle. If the supply doesn't give you an amp rating then divide the watts by the volts and this will be the max amps. John

Problemchild · Answer

I would consider a cheap PC power supply as they will provide all t he power you need for your monitor and easily power your PI plus any ancillary hardware required for the project. They can easily be got hold of, and are complete in their own case so you can build them in to your design with little problems ...They can be bought for under £10 in certain places!

Robert Peter Oakes · Answer

Well the PI needs 5V @ 500mA minimum, Monitor 12V @2.5A so if you use a linear regulator for the PI, thats 12V @ 3A + what ever else you add to the mix. Please remember the PI will NOT use 12V, it would break it Peter