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voltage amplifier circuit using arduino mega 2560 for powering 20 leds

Discussion in 'Microcontrollers, Programming and IoT' started by marlos, Feb 19, 2012.

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  1. marlos

    marlos

    2
    0
    Feb 19, 2012
    hello evryone !

    the main goal of this project is to make a strobe light using 20 leds controling by an arduino mega 2560.

    my problem is that the voltage of the pin of the arduino is 5 v and its not enought to power up the leds how i can increase these voltage ?? any circuit please thanks guys !!! :)
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,501
    2,841
    Jan 21, 2010
    You don't need more than 5V if you place the LEDs in parallel (each with their own resistor).

    The problem then becomes switching the 400mA of current required to drive them.

    For that, a logic level mosfet would be my preferred solution.
     
  3. jackorocko

    jackorocko

    1,284
    1
    Apr 4, 2010
    sorry for getting off track, but is it safe to say that most logic level mosfets don't require a mosfet driver?
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,501
    2,841
    Jan 21, 2010
    The need for a driver is determined by the switching losses you can tolerate.

    When switching losses become significant, you (essentially) need to provide greater gate current to switch faster. That applies to logic level mosfets as much as any other.

    Logic level mosfets simply have a lower gate voltage to turn on.
     
  5. marlos

    marlos

    2
    0
    Feb 19, 2012
    thank you my friend !!
    your information is very helpfull for me !! :)
     
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