Vary Hexfet output with a POT/voltage divider

Thread Starter


Joined Feb 5, 2007
Is it possible to vary the output of a Hexfet with a pot/voltage divider.

I know the fet will get hot like a transistor.


Joined Apr 5, 2008

Yes, it will work.
The Fet will get hot as it is in the "linear" range.

BTW what kind of Fet did you have in mind to use?



Joined Jul 17, 2007
Yes, you can. But, it is better to use PWM with an output filter.

With PWM, the MOSFET is either ON or OFF.

If used in the linear region, it will dissipate power as heat, which is generally considered wasteful - unless your room is cold.

Thread Starter


Joined Feb 5, 2007
I know PWM is better but at the moment i dont have a way to generate a PWM signal.

Do you know of diagrams showing a mosfet in a liner setup.

What i have notices is that the adjustment is a very small part of the pot.


Joined Apr 8, 2015
You are given with a battery source which is used to supply 6 electric bulbs.
At an instant only one should light ,others should be in off condition.... For a minute a bulb should lighten up at least 1200 times.....!
Name the circuit or setup which can be used to distribute the supply...!
Pls answer this guys


Joined Sep 17, 2013
Welcome to AAC!
You have hijacked someone else's thread, which is disapproved of. The thread is also long dead! You are more likely to get a reply if you start your own thread.
Since this is clearly a Homework problem, YOU are expected to show your best effort at solving it if you want guidance. We don't do your homework for you.