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PIC16F84A

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Discussion in 'General Electronics' started by Ankur, Feb 26, 2005.

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  1. Feb 26, 2005 #1
    Ankur

    Ankur Guest

    hi all,
    I am learning the mentioned micro-controller and am trying to drive
    two MOSFETS through IO pins of this chip( these mosfets act as switch
    to a simple motor circuit)
    As far as i know, each IO pin of the uC can source 20mA of current(
    pls correct me if 20mA is the TOTAL sourcing current). Assuming that,
    I was driving 4leds(with series resistance of 1k) and two MOSFETs. But
    the PIC was unable to drive the mosfets although the LEDs were
    glowing.

    Can some1 plz help me out with this ?

    TIA
    ankur
     
  2. Feb 26, 2005 #2
    petrus bitbyter

    petrus bitbyter Guest

    Ankur,

    MOSFETs are voltage driven. The required current is in the nanoampere range.
    The required voltage highly depends on the properties of the MOSFET
    involved.

    petrus bitbyter
     
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