I did a few some time ago. One for Sean and one for few other friends.
Heres the simplest way to drive the LED display:
Of course there are more complicated projects but mostly build using uC
or simple flip-flops. I dare to say trying to bulid one with other way then
the diode matrix is like shooting your own foot.
If you would like to buy one just grab this chinesse one, cheap...
http://www.ebay.com/itm/Red-Universal-Digital-Gear-Indicator-for-Motorcycle-New-/360734533167
I still cant finish my handlebar instrument...gear indicator, shift lightand everything else here...no time and away from home...
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