I have been playing around with an Arduino for a little while now attempting to make my own gear position indicator and here is the almost finished product.
It consists of a 1.3" OLED mounted inside a re-purposed Smiths oil temp gauge that I picked up on theminiforum.co.uk for £10. I have gone down this route so that the gauge looks "factory" once installed and isn't obvious what it is. It will be installed in my carbon fibre centre binnacle.
Background to the Project
There are quite a few commercially available products on the market to purchase but I found them to either be quite pricey or just didn't have the look and feel I wanted. I'm enjoying working with the Arduino so it seemed like a good idea to create me own.
I've gone through a number of code iterations to reach the point that I feel I have a good working product. Each time a problem was encountered I carried out some more research and tried it out with my prototype.