Hello,
I followed this design to create my NES box running RetroPie:
Raspberry Pi – NES Conversion
and this guide:
http://supernintendopi.wordpress.com/
I followed recommended hardware lists when available. Everything works perfectly when I’ve got my RPi powered with an RCA 3ft Micro USB Cable connected to a Mausberry RPi on/off switch, out to another 3 ft RCA cable, then to an Amazon Basics USB wall charger. Links to both:
http://www.newegg.com/Product/Product.aspx?Item=9SIA0PG0C94391
When I try to run the RPi through the setup listed above, then through a USB Coupler connected to a longer Male/Male USB cable and finally to the wall charger, I can boot the RPi into RetroPie, but my game pads no longer work. Here are links to the specific coupler and USB cable:
Thanks in advance for any help!