GM 700r4 Arduino based Programmable Shift Indicator

This was designed for my 1978 C10 which I did a 700r4 swap on (from a TH350). When I did it, I got a floor mounted Lokar shifter for it, but I found out pretty quick I had a hard time telling what gear it was in. Lokar makes a digital shift indicator for this, but it is kinda spendy and I didn't really like how it looked. Also, I wanted to integrate it into the instrument cluster since there was this dead spot where the stock shift indicator was.

Basically what this does is takes the linear motion from the shifter (using a linear potentiometer) and converts that reading into a gear position. Then it spits out some characters to a set of multi-segment LEDs that are mounted in the dash to tell you which gear is selected.

Here is the gear I used:
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* Arduino Nano V3.0
* 0.54" Alphanumeric LED backpack (Adafruit)
* 10k linear potentiometer (but any value should work - the programming in the sketch takes care of it)
* eBoost LM2596 buck converter for power