[See on Github](https://github.com/averaldofh/OBC_VW) # OBC_VW **Author: averaldofh** ## What's this? It is just an atempt to get an on-board computer in an '69 VW Beetle. ## What this thing do? (or should..) It's going to simply show the speed, odometer, 2 parcial odometers, oil temperature, battery voltage and fuel level. ## How it works? **Speed:** There's a hall effect sensor attached to the wheel hub, as well as 4 magnets attached to the wheels. These will give us the RPM of the wheels, then we can get the speed of the car. **Odometer:** With speed and time we can sum our mileage very easily and store in non-volatile memory. **Oil Temperature:** Still figuring out how i will attach an NTC to monitor oil temperature. But the NTC uses a Steinhart-Hart equation. **Fuel level:** Just as simple as a potentiometer and a buoy. **Battery Level:** Simplest thing on the whole project. # this sketch for testing purposes, is runing ok on a ESP32 with built-in OLED screen. still under development.      # Special Thanks **Thanks to youtube.com/user/interlinkknight for his awesome piece of code, regarding RPM counting.**