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Driving transistor from HC273

On Sat, 21 Jan 2006 16:40:59 +0000 in sci.electronics.basics, Pooh Bear wrote,

2222 is really easy to remember.
Reply to
David Harmon
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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.

Reply to
logjam

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

Reply to
Pooh Bear

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

Reply to
Pooh Bear

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?

Reply to
logjam 

--
Sure it is; I\'m still me no matter what I\'m wearing.
Reply to
John Fields 

--
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.
Reply to
John Fields

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