Though it may not look like you expect! I've been busy with the soldering iron and electronics spare bits box recently, so here it is in all its glory:
It's an amalgamation of various designs available on the internet, and should produce 1 Volt of output per 1000rpm for an 8 cylinder engine (adjustable to get just right). I'll hook it up to a microprocessor and attached Analog-to-Digitial convertor I'm working on:
These guts then sit behind the new console section I've constructed:
Which sits in the dash:
The display will (when I'm finished) display the RPM as a number, e.g. "2000 RPM"
Pics when finished
