[time-nuts] T-Bolt Temperature

bg at lysator.liu.se bg at lysator.liu.se
Fri Aug 17 09:29:20 EDT 2012


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 <golgarfrincham at 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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>
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