This project is one of those ones that start out of neccessity. My manual 90's civic felt that it was too cool to have a tachometer. To remedy this, I began to work on the project this summer. Right now the hardware is pretty much all off the shelf kit and the end goal is to move over to a custom single PCB implementation. Additionally, while testing the filters I just used Arduino code to get things done fast. Now that the hardware is verified and the code flow work to my satisfaction I will be porting over the code to C along with the hardware revision. I'm hoping that reading the input pulse from the car counts as connected. :p
The goal is to release the code and hardware files all as open source. I hope others try my design out so I can see just how many different Hondas this design actually works for.
4 Digit 7 Segment based RPM Output.
2 RGB LEDs for a shift light and redline.
Rolling averaging and jitter reduction for readability while keeping a fast response time.
Connects to car via a 4 pin connector spliced into the cluster loom.
Automatic dimming when instrument cluster lights are turned on.
Car off detection.
Any news on this project? I am trying to do the same. Get the tachometer signal from distributor to measure the RPM and with that drive a LED BAR with gear shift..