Teensy and TM1638 Arduino module Dashboard
Connect a Teensy (or an Arduino) to a TM1638 module to have an inexpensive sim dashboard that displays shift light indicator, gear indicator, speed, rpm, fuel and various other information.
What I'm using in this video:
Teensy 3.1 - http://www.pjrc.com/teensy/
TM1638 8X Seven Segments Display + 8X Key + 8X Double Color LED Module for Arduino - http://dx.com/p/8x-digital-tube-8x-key-8x-double-color-led-module-81873#.Uu4e1PmSx8F
Dashboard software - http://batrako.blogspot.com.es/ (hasn't been updated for a while)
Currently using this software (very good): http://www.racedepartment.com/downloads/simhub-diy-sim-racing-dash.10252/
Other Arduino dashboard software:
Xsim3 OBD2 and Arduino - http://www.x-sim.de/forum/viewtopic.php?f=40&t=1083
Fergotech - http://fergotech.net/diy-shift-lights-and-dashboard/ (iRacing only)
Photos: https://plus.google.com/photos/+Yipzone/albums/5975643487361879281