Vary Hexfet output with a POT/voltage divider

Discussion in 'General Electronics Chat' started by mazur50, Apr 1, 2010.

  1. mazur50

    Thread Starter Member

    Feb 5, 2007
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    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.
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    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?

    Bertus
     
  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    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.
     
  4. mazur50

    Thread Starter Member

    Feb 5, 2007
    28
    0
    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.
     
  5. muralivr

    New Member

    Apr 8, 2015
    1
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    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
     
  6. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,789
    1,103
    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.
     
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