Transistor Circuit help

Discussion in 'General Electronics Chat' started by jani jani, Nov 2, 2015.

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  1. jani jani

    Thread Starter New Member

    Nov 2, 2015
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    Can someone help me with this
    Transistor Circuit problem thanks in advance

    The question can be found here:
    http://postimg.org/image/zddyfi17p/

    Thanks in advance

    I'd done A, but no idea about b,c and d. I've tried looking for 4 hours now but still no luck.
     
  2. AnalogKid

    Distinguished Member

    Aug 1, 2013
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    What were you taught about transistor functions?
     
  3. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
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    The transistors are used as switches,

    base / emmiter voltage is approx 0.7V for silicon, gate voltage -5v,

    the diode is for back emf suppression from the relay.
     
  4. dl324

    Distinguished Member

    Mar 30, 2015
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    If this is homework, you should post in that forum.
     
  5. Wendy

    Moderator

    Mar 24, 2008
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