barnabefi:
Sorry to bother your post.
I am really interested in your project, I would like to adapt it for my paramotor.
I don't understand how you connect to the ignition coil.
Can I adapt it to this 2 stroke coil ?
Thanks
Not sure. Perhaps it's easier to make some sort of induction sensor in your case (by using a piece of wire wrapped around the spark plug wire, or a "non-invasive split core current transformer" like a ignition timing light). You would also need to make a small modification to the calculation of the rpm. I suggest you open your own topic, if you haven't done so already, so that other users can help you.
I'm not really sure. I've lost focus on this project. I remember that i've made the effort to solder the circuit on a pcb after testing with it on a breadboard. That implies I was happy with the results.
However I also, for some reason, have purchased a split core current transformer/current sensor for this project, suggesting I (at that time) may have thought that might yield a better signal for the Arduino. That sensor has not been used or tested though.
As the weather will improve I may pick this project back up in the coming weeks. If so, I hope I will remember to post my progress/results.