We've been through this before. The boards were made for Olympus by Sharp
using proprietary ICs. At first Olympus tried to make their own circuits
for the 4. They gave up and had Sharp do it for them.
_________________________________
John Hermanson
Camtech Photo Services, Inc.
21 South Lane,
Huntington, NY, 11743-4714,
631-424-2121, www.zuiko.com
_________________________________
----- Original Message -----
From: "Matt Boland" <mattboland@xxxxxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Saturday, July 17, 2004 1:31 AM
Subject: [OM] Re: OM4 strange electronic buzzing sound
>
> I guess I like photography AND engineering. I was just thinking that we
> could do better than USD$250.00 for an OM4Ti circuit. And I would get to
> make the shadow and hi-light buttons into -1/3,+1/3 stop buttons.
>
> W Shumaker wrote:
> > I mentioned that possibility a couple of years ago. But who has
> > really got the time to spend on it when that time could be spent
> > making photographs. My solution is to stockpile a few extra
> > bodies and hope they don't stop making 357 batteries and film.
> > The metering circuits of the OM-4t is the real trick. I'm sure with
> > todays electronics, much could be improved, calibration without
> > pots, rear curtain sync, .... but in the end you really don't end up
> > with that much more. Life moves on, we get older...
> >
> > When I got technical, a teacher told me to just go take some pictures.
> > And thanks to John and Clint, who probably aren't getting any younger
> > either, who help keep it all going.
> >
> > Wayne
> >
> > At 08:44 AM 7/15/2004, you wrote:
> >
> >
> >>Is there enough demand to develop our own replacement circuits? I don't
> >>know how much the circuits changed over the years and whether or not
> >>they use the same chips as the originals, but USD$250 sounds extreme. I
> >>currently am working on a 32bit CPU board running linux, 32M of RAM and
> >>Flash, and they will cost roughly USD$120 to manufacture. Texas
> >>Instruments make a nice little chip called the MSP430 which comes in
> >>many variants and is designed for ultra low power applications.
> >>Something like that could incorporate most of the functionality in
> >>software. I reckon a USD$40.00 part could be met. Of course, FCC and CE
> >>EMC compliance would need to be addressed, so maybe the cost of testing
> >>to those standards outweighs the development effort.
> >
> >
> > The material cost is not the issue when you figure in time and effort.
> >
> >
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> >
>
> --
> Matt Boland (BEng) Phone : 61 7 5594 9824
> R&D Engineer Mobile : 61 4 0835 1421
> Odyx Corporation Pty Ltd email : mattboland@xxxxxxxxxxx
>
>
>
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