Dimmer Led using MOSFET

Discussion in 'The Projects Forum' started by embpic, Jul 6, 2014.

  1. embpic

    Thread Starter Member

    May 29, 2013
    187
    3
    i need DC led light dimmer. i have to do dimmer led light which is of near about 10 watt of 10 volt.
    so bit confused how to do??
     
  2. embpic

    Thread Starter Member

    May 29, 2013
    187
    3
    what is good whether transistor or mosfet or fet????
     
  3. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,170
    395
    A few posts up, " 30 μs LED pulse", both NPN & N-ch MOSFET were used to drive a 1W LED & 1 A. Both worked, I preferr the MOSFET.
     
  4. wayneh

    Expert

    Sep 9, 2010
    12,086
    3,025
    Me too. Fast switching of power to an LED is a perfect application for a MOSFET. The only drawback is the higher gate voltage needed, compared to a BJT. But the lower base current and lower "on" resistance are big advantages for MOSFETs.
     
  5. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,170
    395
    Now a few posts down. FET easily driven by a 555 output from one of Bill's PWM ckts.
     
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