[DUG] Weather Stations

[Jeremy Coulter]

Have you thought of simply sticking your hand out the door to see if its
cold, wet or dry ;-) hehehe

Actually, a few years ago wrote an interface in Delphi that read the
temperatures off DS1820's which are a one-wire thermistor put out by Dallas
Semi conductors. They were even used in the Space Station...the thermistors
not my interface :-)
They however were a bit dodgy as it turned out, and they brought out the
DS1821 which had a far better accuracy level. Although I think from memory
they changed them from 8bit to 7bit.
Anyway, I had a bunch of them all over the house and outside. Then in the
morning I could see the temperature range (via my application) inside and
out over night.
How use full was it? Not a lot, but it kept me off the streets, but not the
booze :-)

I also played around with the DS1620 and there was another one which did A2D
conversions as well as a thermisor built in and had a 256K memory built in.
The Ds1620 is/was a chip with a thermistor built in and it also had an
onboard memory, but I also logged the temps to external memory. I designed
the circuits and programs again and we were going to use them to replace
some temperature loggers at work that are used to monitor fridge temps for
vaccines etc.
However, they only had a resolution of 0.5C so they were no good in the
end....oh well.

Jeremy

-----Original Message-----
From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz] On
Behalf Of Jeremy North
Sent: 25 March 2009 20:31
To: NZ Borland Developers Group - Delphi List
Subject: Re: [DUG] Weather Stations

I commute by bike so I'd like to know the temperature in the mornings.
It had rain and appear cold, but it wasn't. It was almost twice the morning
temperature than the day before.

I didn't want to have to turn on my PVR to check the temperature (nor a
computer).

Interface to a PC because, well I'm a programmer - do we really need a
reason to want to do that!

On Wed, Mar 25, 2009 at 4:44 PM, Steve Peacocke <steve at peacocke.net> wrote:
> "No, but I've GOTTA HAVE ONE" is probably the wrong answer for that
> :o)
>
> Steve Peacocke
> Melbourne
>
>
> On Wed, Mar 25, 2009 at 4:39 PM, Jeremy Coulter <jscoulter at gmail.com>
wrote:
>>
>> Have you never heard of gadgetitous ???   :-)
>
> _______________________________________________
> NZ Borland Developers Group - Delphi mailing list
> Post: delphi at delphi.org.nz
> Admin: http://delphi.org.nz/mailman/listinfo/delphi
> Unsubscribe: send an email to delphi-request at delphi.org.nz with Subject:
> unsubscribe
>

_______________________________________________
NZ Borland Developers Group - Delphi mailing list
Post: delphi at delphi.org.nz
Admin: http://delphi.org.nz/mailman/listinfo/delphi
Unsubscribe: send an email to delphi-request at delphi.org.nz with Subject:
unsubscribe