I am not a professional, and I have built the interface, you can evaluate and give me ideas.
http://i1157.photobucket.com/albums/...ps9ccf8b45.png
View more:
PCB: https://www.box.com/s/a7pfqlklp23w0x276j6f
SCH: https://www.box.com/s/putn9p4t9ghfyebxv6yk
