In reality I will only use 7-8v
I make the tension varie using the Arduino. In practice, according to the first tests I have done, 11.1v will be too much and will make the balls to quick. I can consider in a very very extrem case having 11.1/1.8 = 6A but I guess that I will never have that.
A 15A diode should be sufficient then. Or 20A if we need more security.
Hope you had a great WE
Yes, I see what you mean, the medium voltage is lower but I will still have +12v some time to time depending on PWM signal. So I have to take into account the maximal intensity!
So, I definitely need a 50A diode...
Thank you for the English compliment, better writing than speaking