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Driving transistor from HC273

Discussion in 'Electronic Basics' started by logjam, Jan 21, 2006.

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  1. David Harmon

    David Harmon Guest

    On Sat, 21 Jan 2006 16:40:59 +0000 in sci.electronics.basics, Pooh
    2222 is really easy to remember.
     
  2. logjam

    logjam Guest

    I'm considering using TWO 574s. Load all 216 574s and then all at once
    clock in the pixels for a row. This would allow the most on time. Is
    it worth the extra $60 in 574s? One benefit is that it would allow for
    a MUCH slower clock rate to the registers. I could take up to 10-14ms
    without any trouble.
     
  3. Pooh Bear

    Pooh Bear Guest

    In which case it's NOT a 2N2222 !

    Show me 2N2222s for 1 cent please.


    Of course its true. Less Ib loading of a bias network for example.

    That is a truly absurd comment.

    What on earth do you think is going to happen here ?
    Overdesign won't win you any friends when the kit gets costed.

    Graham
     
  4. Pooh Bear

    Pooh Bear Guest

    I can't say I find the thinking behind that very compelling. It would seem
    perhaps to be about the only thing going for the part though.

    Graham
     
  5. logjam

    logjam Guest

    I could afford the expensive part because I did save a ton on the LEDs.
    :) Got them all new old stock for .6 cents a piece.

    Any ideas on the register situation?
     
  6. John Fields

    John Fields Guest

    ---
    Sure it is; I'm still me no matter what I'm wearing.
    ---

     
  7. John Fields

    John Fields Guest

    ---
    Now you're just being pig-headed.

    There's absolutely nothing wrong with 2N2222's or their differently
    garbed counterparts when they're used properly. As a matter of
    fact, they've got a lot going for them when you look at their cost.
     
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