Wiring Classic Machines to Triacs (was: Assembly vs....

From: Don Maslin <donm_at_cts.com>
Date: Tue Aug 21 23:22:24 2001

On Tue, 21 Aug 2001, Richard Erlacher wrote:

> see below, plz.
>
> Dick
>
> ----- Original Message -----
> From: "Roger Merchberger" <zmerch_at_30below.com>
> To: <classiccmp_at_classiccmp.org>
> Sent: Tuesday, August 21, 2001 2:38 PM
> Subject: Wiring Classic Machines to Triacs (was: Assembly vs....
>
>
> > Rumor has it that Tony Duell may have mentioned these words:
> >
> <snip>
> >
> > 3 questions:
> >
> > Does anyone have some good schematics or facts/figures (no matter how
> > basic) as to a good way to interface triacs to a classic computer? (I'm
> > mainly worried about 2 things: circuit isolation & heat dissipation of the
> > triac) ...
> >
> Take a look at the Motorola Optoelectronics Databook. That has optoisolated
> triac drivers, SCR drivers, etc. in addition to the usual optoisolators. Also,
> take a look at Burr-Brown's isolation hardware. They've got a couple of pretty
> good devices I once used to provide isolation between the stage (_at_2KV reference
> with respect to earth) and the interface logic (_at_earth-ground reference) on a
> scanning electron microscope for auto-registrathion/alignment of wafers in an IC
> fab. They're capable of over 2 KV of isolation and 80MHz of bandwidth.
> >
> > Does anyone have some good schematics / advice on how to interface a 12 or
> > 16-bit A/D chip to an 8-bit system?
> >
> there are converters in both directions that operate serially, not to mention a
> few that work byte+nybble. Check with www.maxim-ic.com and www.analog.com
> >
> > And lastly: Does anyone have any references to where I could purchase
> > 40-pin board edge connectors (instead of the usual 44-pin) other than
> > hacking said connectors with a dremel tool?
> >
> more info is needed here. What pin pitch are you after? If you want the most
> common 44-pin connector's pitch (0.157") there may be trouble, but Gateway
> Electronics in Denver, (they don't even have a web site!) (303) 458-5444 had a
> few dual 20's on 0.100" pitch when I last looked.

                        **** www.gatewayelex.com ****

> > Web references, book references, personal experience, *any* info is welcome!
> There are LOTS of sites that handle "controlling the world" interface issues,
> and may show up on GOOGLE searches using simply the most obvious search terms.
> Try "stepping motor" or Fourier Series, just for grins ...
> >
> > Thanks loads (and trying to keep the S/N ratio higher...)
> >
> > Roger "Merch" Merchberger
> > --
> > Roger "Merch" Merchberger --- sysadmin, Iceberg Computers
> > Recycling is good, right??? Ok, so I'll recycle an old .sig.
> >
> > If at first you don't succeed, nuclear warhead
> > disarmament should *not* be your first career choice.
> >
> >
>
>
Received on Tue Aug 21 2001 - 23:22:24 BST