Here is what i am doing, and..what is going wrong ..
I use a N channel Mosfet and a P Channel to switch on and off the motor of an electric screw driver.
I think there is a little problem in my schematic because when the pin of the ARDUINO is LOW, i still have 8,6 V on the Drain of the P channel Mosfet
When the PIN is HIGH, I have 10 V on the Drain, and the relay is working good and the motor is turning.
When the PIN is LOW, the relay and motor don't work, perfect ... but i still have something like 8.6 V on the DRAIN.
is it normal ?
Do i have to do something to avoid this ?
If i plug a 10mm led in place of the RELAY & MOTOR, with a 390 Ohm resistor to the ground, i can see a little activity on the LED ... the 8.6V.
PIN HIGH of the ARDUINO and the LED is fully On ..
Thank you for your advice ...