I am currently in the process of finalizing a 10-probe temperature display for monitoring the temps of various components inside my computer. I have been using USB to power the Arduino so far, so I am looking for a way to provide power through the actual power input on the Arduino as opposed to the 5v USB power. Is there much of a difference?
I had read somewhere a while back that the Arduino responds differently to USB power than it does to the 9-12v power input, is that true?
Basically my thought was to power the Arduino directly from my ATX PSU, either to have the Arduino power on automatically when I power on the computer, or to use the 5v standby power from the PSU to have it powered on all the time (provided there is no difference between how the Arduino responds to the 5v)
I always see the power input specs as 9v-12v nominal input, so if I can not use the dedicated power input on the Arduino with the 5v SB from the PSU, can I safely use the 5v SB through the USB port on the Arduino?
I could continue using the USB from my computer to power it, but the issue with that is that when I power down my computer the USB ports will no longer provide power to the unit, so that will not work. There is a dedicated charging port on my motherboard, but the problem with that one is that it is not very consistent, and it appears to put out 2A sometimes, and I fear it would bork my Arduino...
Anyhow, the Arduino will be on my desk, just a short distance from my computer, perhaps a 6ft cord is necessary, so the unit will not be inside my computer at all.
Thank you in advance!