Am I connecting the transistor right?

Discussion in 'The Projects Forum' started by david1234, Jun 9, 2014.

  1. david1234

    Thread Starter Member

    Nov 27, 2013
    81
    1
    I'm using this transistor -
    Motorola 9648 EBCK
    (after a long search I have found that it's Motorola number is - 48-11043C07 ), but could not found any datasheet of it
    so I think I have connected it correctly like shown in the image
    please let me know if I'm right

    my problem is that if I connect to is a device that work on ~ 500-600mA
    it doesn't work , and I can see that he voltage on it is 7-8V
    the S of the transistor is connected to 12V .
    can someone help me find my mistake?
    maybe I need another transistor?

    Thanks,
     
    Last edited: Jun 9, 2014
  2. paulktreg

    Distinguished Member

    Jun 2, 2008
    609
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    Is it a FET or Bipolar Transistor? "EBC" is a big coincidence if it doesn't mean emitter, base, collector?

    Post a schematic and you may get more help.
     
  3. david1234

    Thread Starter Member

    Nov 27, 2013
    81
    1
    this is the circuit
     
  4. simo_x

    Member

    Dec 23, 2010
    200
    6
    It seems you are using the transistor as a PMOS. Are you sure this is a PMOS ?

    With a multimeter you can check if it is a MOSFET or a BJT. ;)
     
  5. david1234

    Thread Starter Member

    Nov 27, 2013
    81
    1
    really?
    how can I do this? I don't know how
     
  6. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Put your meter on Diode test, or Ohms and test between Base-Collector, or Base-Emitter.
     
  7. absf

    Senior Member

    Dec 29, 2010
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  8. shortbus

    AAC Fanatic!

    Sep 30, 2009
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  9. david1234

    Thread Starter Member

    Nov 27, 2013
    81
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    I have check
    B and C -->I get ~20M
    B and E -->I get O.L.
     
  10. MaxHeadRoom

    Expert

    Jul 18, 2013
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    The thumbnail in your OP shows notation for a FET, and is reversed for the common ones like a 2n7000 etc.
    S-G-D.
    Max.
     
  11. BobTPH

    Active Member

    Jun 5, 2013
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    The diode check range should be reading in Volts.

    bob
     
  12. AnalogKid

    Distinguished Member

    Aug 1, 2013
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    My first thought about the marking is that this is a private-label or house-marked bipolar transistor of completely unknown type, manufactured in the 48th week of 1996, with pinout Emitter-Base-Collector. That is a direct conflict with the schematic, but a very common marking from that period. Diode-testing the left and center pins should confirm or deny.

    Why are the 555 timing components connected backwards?

    ak
     
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