IOIO Segment is an IOIO boar application for control 4-digit number on 7-Segment.Just connected IOIO board to your android device then select digit and number as you want.

Explain : This application use with IOIO or IOIO-Q board you can buy in www.inex.co.th
http://goo.gl/iSFHP

** Must be connected by USB for stable 7-segment's blink rate.Not recommended using a bluetooth **

Explain : This application use with IOIO board you can buy in www.sparkfun.com or www.inex.co.th
Circuit for this application
Connect IOIO board with 7-Segment by
Port 1 : A
Port 2 : B
Port 3 : C
Port 4 : D
Port 5 : E
Port 6 : F
Port 7 : G
Port 8 : DP
Port 12 : Digit 1
Port 13 : Digit 2
Port 14 : Digit 3
Port 15 : Digit 4

Download source code from
http://goo.gl/TolTEK
or
https://github.com/akexorcist/IOIO-7Segment/