bs107 alternative

Discussion in 'The Projects Forum' started by markosillypig, Jan 4, 2010.

  1. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    0
    hi all
    im making this circuit at some point but would like to know if there is an alternative to bs107 ??
    scamatic included
    thanks for any help
    marko
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
    Hello,

    You could look for the 2n7000.

    Greetings,
    Bertus
     
  3. SgtWookie

    Expert

    Jul 17, 2007
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    What's the high voltage?
    I only see 5v and 9v on the schematic.
     
  4. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
    184
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    hi
    the supply voltage is 4.8V not 5V and ignore the 9v
     
  5. SgtWookie

    Expert

    Jul 17, 2007
    22,182
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    Why not use IRLD014's then? They come in a 4-pin DIP package which is easy to work with, can sink up to 1.7A, and are specifically rated for logic level operation.

    While you can use 2N7000 MOSFETs, they're not specifically rated for operation at logic levels; you'll have to verify each one to make sure it'll work with your application.
     
  6. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
    184
    0
    thanks sgt wookie i will use them as i have a bag full of the IRLD014's just thought they may be something more suitable in a smaller package like a TO92 :)
     
    Last edited: Jan 4, 2010
  7. SgtWookie

    Expert

    Jul 17, 2007
    22,182
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    Well, you don't have to use MOSFETs. You could use a ULN2003. You'll have about a 0.7v Vce with 20mA current though. One part, 7 Darlingtons.

    You could also use discrete transistors, like 2N3904, 2N2222, etc - with a 470 Ohm or 1k Ohm base resistor.
     
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