One big dial is still missing, the speedometer. The exact design of the corresponding signal can be found in this forum entry.
Utilizing the new hardware, a separate driving circuit is no longer necessary. One of the output drivers that provide ground can be used to simulate the VSS (Vehicle Speed Sensor). It was a little surprise to me that everything worked right away:
Testing the speedometer should not take too much time as the odo and trip meter starts running, too. All bench testing combined already put about 20 km on the car without moving it an inch ..
The number of cables running towards the gauge cluster in above video increased significantly. A nice example why bus communication became, at some point, necessary for modern cars.
All main functions are running now but three minor issues have been detected and need to be corrected in a new PCB design. We'll talk about those in the next days.
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