Retropie test build
Laid out and connected up all the parts for the retropie mobile build before considering case options and tidying up. I have a pretty poor USB power bank with a DC-DC booster to up the voltage to 5.2 Volts. A tiny 3W stereo amp drives two 4 ohm speakers and a dual gang pot to adjust the analogue jack out. By switching the sound mode to mixer, you can ramp the volume up and you get much more signal to noise (there's still a little hiss).
Parts used for those who need them.
DC Booster.
http://www.ebay.co.uk/itm/171667773271?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT#
Potentiometer
http://www.ebay.co.uk/itm/170703080727?_trksid=p2060353.m2749.l2649&var=470042112678&ssPageName=STRK%3AMEBIDX%3AIT
Knob
http://www.ebay.co.uk/itm/170703080727?_trksid=p2060353.m2749.l2649&var=470110508757&ssPageName=STRK%3AMEBIDX%3AIT
Speakers
http://www.ebay.co.uk/itm/361441403073?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Micro Amp
http://www.ebay.co.uk/itm/230886667740?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Power Pack
http://www.ebay.co.uk/itm/141641548129?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
USB Gamepad
http://www.ebay.co.uk/itm/391325686009?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Touchscreen
http://www.ebay.co.uk/itm/311479854861?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Wifi module
http://www.ebay.co.uk/itm/251691080838?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Heatsinks
http://www.ebay.co.uk/itm/252078304161?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
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