09-10-2017, 10:44 AM
(This post was last modified: 09-10-2017, 10:58 AM by rmbusy.
Edit Reason: Update info.
)
(09-10-2017, 08:14 AM)digitaldaz Wrote: Something along these lines maybe?? http://cpc.farnell.com/stontronics/pd-10...es-PW03539
Nice supply (I have one similar to that), but a bit overkill. It will work fine for what the OP is doing too.
I see folks saying 3+ amp supplies are required, but in reality, the actual requirement depends on what you're doing. For example, I just powered up my Rock64 4G board from a Agilent 6626A power supply, to measure the current. My board currently has the jessie-minimal-rock64-0.5.7-101-arm64.img running, with nothing else connected to the board, and it's consuming 192mA (0.192 amps).
Personally, I consider that my starting point, then I'll add to the power requirements as I plan to plug things in to it (although I usually have a 2A supply connected to it).
When in doubt though, go with more supply capacity, since any droop in the supply voltage (caused by overloading it) will likely manifest itself as serious system instabilities.
Correction: When taking the above power measurement, Ethernet was connected and active. Disconnecting the Ethernet cable causes the current to jump up a little, to about 205mA. When reconnected, once the link is established, it drops back to 192mA.