I am completely new to Arduino, but I have an idea for a project. I have some programming background and work as an IT-consultant, so I am sure I will eventually figure that out with some trial and error.
However, before purchasing components I would like to get some input on what to purchase and if my project is even feasible.
I have a Waterskiing/wakeboard boat and this boat has a speedometer that uses a paddle wheel that send an electrical pulse to the speedometer to register the speed of the boat. I have all kinds of issue with the paddle wheel, mainly that seaweed and other stuff grows on it and very early in the boating season the paddle wheel stops rotating. Before that it is also inaccurate.
My idea is to use a GPS antenna, a GPS shield for Arduino and an Arduino board to create a small system that can convert the GPS speed to a pulse to simulate the paddle wheel pulse.
I am not 100% sure of what frequency will read to what MPH speed, but I saw for some different paddle wheels from the same manufacturer it was in the 4.5 - 5.5 Hz per MPH range and I need to be able to read 22 MPH +/- 5 MPH and then I am fine. So being able to output a PWM from the Arduino at roughly 80 Hz - 150 Hz should be what I am looking for.
As I understand it the PWM signal should ideally be 12V, but I don't know if that is necessary for the speedo to work.
Any input on whether this project seem feasible or not and what components I would need is greatly appreciated. Also any pointers on where to start with the coding once I get the components would of course also be appreciated.