Hello,
I'm a beginner in Arduino project, but I want to pilot an PWM solenoid with a genuino card and a MOS transitor.
My solenoid is a 12V, and a current from 0 to 800mA, so my question is, is it possible to deliver this current with my configuration ?
Thank you for your help.
Julien
Hi
No. Absolutely not!
Arduino will supply 5V and max rated pin curren s 40ma. You will need an external 12V power supply to manage this. Also, don't connect the 12V supply to ANY of the Arduino pins. You can use a 12V PSU to power the Arduino though.
Hi,
Welcome to the forum.
Can you please post a copy of your configuration circuit, in CAD or a picture of a hand drawn circuit in jpg, png?
Thanks.. Tom.... 
With the right mosfet and a connection to the right point on the power supply somewhere before the regulator on the UNO (assuming that can manage 12 volts an current to spare), it should work.
See: Arduino N-MOSFET Switch and Solenoid - Project Guidance - Arduino Forum