Hey i'm having trouble with one mosfet IRFP140N. To activate it i need more voltage than arduino gives more or less 10V. How can i do it?
Thank you
http://tinyurl.com/ydevjyvq (You can click the logic input for switching)
Note that this inverts the control pin.
You could also use a proper gate driver IC
Then you wouldn't have to worry about inverting the signal
hatori9:
Hey i'm having trouble with one mosfet IRFP140N. To activate it i need more voltage than arduino gives more or less 10V. How can i do it?
Thank you
First things first, what are you trying to do with that MOSFET?
I'm trying to do this circuit
Oh, that circuit ...
No, you don't understand my question: "what are you trying to do" - what effect are you trying
to acheieve, not how. I'm suspecting xyproblem.
I'm doing a circuit Screenshot - b620e6fd99468520980e954e49589268 - Gyazo
I'm trying to do a magnetic levitation device
Hey i'm having trouble trying to do this project with the transistor.
I have tried this circuit with some transistors and it doesn't work as i want i would like to control the coil with arduino and transistor.
Here the schematic:
The coil:
And what i use to power: (12V MaxA 15)
Do not double post.
Be sure to use a logic level MOSFET.
The schematic is lacking the required resistor between the gate and the port pin, and a gate pulldown resistor. See Q3 in the example circuit below.
You posted this twice...
It looks like 5V and 3.3V are connected in that circuit. Also you should have a resistor to limit current over the LED.
In that circuit I would definitely use a real gate driver to properly open the MOSFET quickly. It looks like the MOSFET is supposed to handle some fairly serious currents.
Do not double post.
Are you trying to build something similar to this?
kamelryttarn:
Are you trying to build something similar to this?
Yes but with ir sensors
A gate driver IC is probably the way to go, nice and fast, designed to work at 12V. There are 1000's available from electronics suppliers, a simple low-side MOSFET driver is what you require, something like a MIC4422 although that's probably overkill, it is a chip thats available SMT or through-hole.
Don't forget the free-wheel diode, its essential.
BTW why a 100V MOSFET for a 12V circuit?
@hatori9, do not cross-post. Threads merged.
hatori9:
Yes but with ir sensors
How do you expect to measure the magnetic field with IR sensor.
That project uses the Hall Effect Device to control the magnetic-flux of the solenoid.
If you are trying to control the levitated object by monitoring its defection, how are you going to detect position?
Tom... 
Perhaps he aims to build this circuit.