GPS Speedo with a speedo from an Volvo 240.
This speedo works with an Arduino, AD9850 signal generator (DDS) and a NEO-6M GPS module.
At this moment the speedo reacts a little bit slow. I'm looking for a better GPS unit or i'm going to do something with an accelerometer. It's also possible to use a hall sensor and a magnet on the driveshaft.
