Power input for PiFace digital and Raspberry from ATX

I have PIface digital and ATX power supply for PC. Can I use power +5 from ATX power supply for PIface digital and Raspberry board at the same time?

If it possible how can I use it?

P.S.

Sorry, I don't have expirience in electronic equipment.

Best regards

Problemchild over 12 years ago

Yes you can you will need to connect all the 5V rails together if they are not already connected.
You will also need to make sure that you do not ttry to power the RPI from another PSU at the same time and also the Power On Pin 16? on the ATX plug needs to be taken low to start the PSU.

Make sure you are confident the system is corectly wired as the ATX PSU will deliver much higher currents than the "wall warts" and cook up your boards ;( !!!
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Former Member over 12 years ago in reply to Problemchild

John, thank you, for your answer!

I want use power supply http://www.morex.com.tw/products/productdetail.php?fd_id=63
for rasperry pi and monitor http://store.mp3car.com/Lilliput_669GL_70NP_C_T_HB_RV_7_HDMI_DVI_VGA_Hi_p/mon-124.htm
at the same time. I want connect power supply +5v to PiFace Digital and +12v to monitor. I must assembly decrease power for PiFace?
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Former Member over 12 years ago

one potential problem when using ATX supplies is that some of them will not switch on unless some minimum load is present. What that minimum load might be and for which rails (5v, 3.3v, 12v) is rarely specified, only the maximums tend to be speifiied as it's assumed you'll be plugging it into a PC which will provide more than enough load.
In the case where it won't switch on, you can normally get 5v from the 5VSB pin even when the supply proper is switched off, but 5VSB is usually not capable of supplying lots of current. For example a supply that can deliver 25A on the main 5v rail might only deliver 2A on 5VSB.

You'll probably need to experiment with your particular supply to see exactly what it does and what works or doesn't.
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