My Chrimble pressie to Precious was a new knob..
The old China eBay knob was getting a bit pitted (but it has to be said hasn't been bad for £20 considering other titanium effect balls go for $70 ! )
Got a nicer Blox Limited Neo Chrome from Sportz. I'm keeping the old finisher for now. Shiny oily petrol blue might not be to every one's taste (love it personally), but I also quite like the infamous Gold wrapped R8 (innit) in another thread (all be it without the stripes) - so clearly I'm no arbiter of style :lol:
My independent car monitor side project hasn't progressed *that* far yet, although when the weather is better, I'll start fitting. Gentle winter driving is the order of the day up to then.
All the wiring from the sensors will be installed in the car via the firewall grommet leading to a big D plug. The D socket then connects to the micro controller, allowing for easy development. The mini TFT display will also be installed via the plug. Power will come from an extra fused supply, with series diodes to give polarity protection and a small voltage drop to be kinder to the regulator. Sensors are twin wideband AFR, MAP for boost/vacuum, oil temp via the port on the oil cooler sandwich plate, fuel pressure via the port on the Aeromotive FPR, extra IAT via a hole in the Vortech intake - TBD - and extra coolant temp, probably a via port coupling added to the top rad hose. I am happy with OEM gauges for other things.
Here is the Arduino Due micro controller with a veroboard 'shield' containing all the requisite resistors to form potential dividers with the sensors. I'm using 1% tolerance types (on the other side of the vero), so easily as accurate as anything off the shelf. I have full maps for non-linear and linear sensors, and have written code to convert these to real values. I will be making use of coloured numerics (and possibly trigger some kind of alarm) if any parameters go out of spec. There are plenty of options for active checking here. For a bit of bling I display a Japanese rising sun on startup