The DS1620 is located just behind the RS-232 connector. This is on the
far corner from the oscillator.
Mike
On 8/22/2012 12:59 PM, Ron Ward wrote:
Hi:
What is the temp chip reading? Is it reading the oven temperature or just
the ambient temperature?
Ron
-----Original Message-----
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Azelio Boriani
Sent: Friday, August 17, 2012 7:57 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] T-Bolt Temperature
No, IIRC the problem is indeed with the chip because the new silicon
release has no higher resolution temperature reading. The old chip allows
this reading via an unofficial feature that the new chip has no longer. The
TBolt firmware exploits this unofficial (but documented and known) method
of reading.
On Fri, Aug 17, 2012 at 3:29 PM, <b...@lysator.liu.se> wrote:
It would be a worthy hack (in the classic sense) to extract the Tbolt
firmware and patch it to work with the current temperature chips.
--
Björn
Hi
Just in case this inadvertently heads of in the wrong direction….
Lady Heather displays exactly what the TBolt firmware comes up with. The
disconnect with the new sensor chip is between the TBolt firmware and
the
chip it's self.
Bob
On Aug 16, 2012, at 10:37 PM, Arthur Dent <golgarfrinc...@yahoo.com>
wrote:
Do you know the part number of a chip to replace the DS1620?
The part number is the same, DS1620. What is important is the
revision of the DS1620. When Dallas Semiconductor/Maxim
'improved' the chip and went from REV-D (or D2) to REV-E they
made a change in the way the data was sent to the outside world.
Lady Heather displays the temperature from REV-E chips in
distinct step instead of a smooth curve.
I have used REV-C2 chips as replacement and they work just
fine. Note the chip revision has little or nothing to do with the
Trimble REV letter on the outside of the Thunderbolt case, the
latest Thunderbolt revision from 2005 just happens to be a
REV-E.
-Arthur
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