powering the amp+, the pi, and the pi's official touch screen display?


I'm having issues trying to power the Amp+, the Pi and its display from the same power supply...

The power supply is 12V 3A and the Pi starts up but the display doesn't turn on. The display is powered via the Pi's USB port and that works well when I power the Pi separately via its microUSB port as well...


1) the documentation here says "It is not allowed to connect 5V to the Micro-USB port of the Raspberry Pi"

2) Even if it's not harmful, having to use 2 power supply is a rather awkward.

3) I have to power the Pi first and then power the amp+. The other round doesn't work.

Has anyone seen this? Any idea what to do to fix this?



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