Subject:
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Re: Aaargh. L272 IC needed.
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Newsgroups:
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lugnet.org.ca.rtltoronto
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Date:
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Thu, 19 Jul 2001 03:47:44 GMT
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Viewed:
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453 times
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In lugnet.org.ca.rtltoronto, Martin Legault writes:
> In lugnet.org.ca.rtltoronto, Calum Tsang writes:
> > We've run into a little bit of a snag with Operation DCC. Mario has done up
> > the TMW5 Booster board, but we're missing an IC for the decoder unit.
> >
> > It's the SGS Thompson L272, a dual power op amp in a DIP package. We need
> > the L272M, the eight pin DIP variant. And we need one for every decoder.
> > Anyone have a line on these? We've tried Supreme on Queen, Electrosonic,
> > Active Components. I'm even willing to desolder them from dead VCRs and the
> > like. Our last ditch is to order from DigiKey or Mouser.
> >
> > Anyone?
> >
> > Calum
>
> Hi Calum,
>
> have you found the chip yet? OpAmp in 8 pin dip is a common thing, you'll
> probably be able to find a equivalent of that chip that will do the job.
>
> Bring the spec of the chip with you to a store so you can check the spec in
> databook and equivalence book.
Actually yes. Among fighting corporate Real Estate this morning,
demonstrating my two fisted project management skills, and the usual
critical nonurgent at the office, we also managed to hunt down a source of
L272M's at a component firm. With any luck, 15 will be making their way to
me soon.
We could have used like LM386 or something but, I think this is easier.
They were cheap! 97 cents each.
Note: I consider a good tactical project day a "three pack habit day", ie,
running down three Companion batteries on my digital cordless over the
course of 9AM-11PM. :) It's midnight now and I'm still rolling.
Calum
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Message has 1 Reply:
 | | Re: Aaargh. L272 IC needed.
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| (...) Yes..... it looks like DCC is a closer realization at (or with) rtlToronto than was possible...Awesome....I still like that DCC joystick/controller for $150... it looked very neat (I saw it at my local hobby shop).... but I really don't want (...) (23 years ago, 19-Jul-01, to lugnet.org.ca.rtltoronto)
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Message is in Reply To:
| | Re: Aaargh. L272 IC needed.
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| (...) Hi Calum, have you found the chip yet? OpAmp in 8 pin dip is a common thing, you'll probably be able to find a equivalent of that chip that will do the job. Bring the spec of the chip with you to a store so you can check the spec in databook (...) (23 years ago, 19-Jul-01, to lugnet.org.ca.rtltoronto)
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