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[wxsig] b4 I buy?

William Beals will at beals5.com
Sat Jan 13 18:48:36 UTC 2007


Rich:

I am not familiar with the HobbyBoards sensor.  Main thing to look for is
that it is schematically similar to the TAPR sensor.  In particular, there
should be offset and gain adjustments for the sensors output to match exact
voltages for your adjusted-to-sea-level BP levels.

will 

-----Original Message-----
From: wxsig-bounces at lists.tapr.org [mailto:wxsig-bounces at lists.tapr.org] On
Behalf Of wn0x at earthlink.net
Sent: Saturday, January 13, 2007 8:58 AM
To: TAPR Weather Station SIG Mailing List; 'TAPR Weather Station SIG Mailing
List'
Subject: RE: [wxsig] b4 I buy?

Will,

Does the BP sensor from HobbyBoards work equally well with the T238 as the
unit from TAPR?  Humidity sensor?

As for cost:
PC $500
TNC $209
Cables, Electricity Etc - $50

Weather reporting system that runs 24/7 whether my home computer or internet
connection is working:  Priceless

BTW:  Replaced the CAT5 with standard 6 conductor phone cable and my error
rate dropped to 0 for most sensors.  

The current standard for phone connection uses the blue/blue-white pair
instead of Red/Green - Using the CAT5 blue white pair worked pretty well
even for my 150 foot run although I had more errors than standard phone
cable.  Lowes charges about $25 for 250 foot of phone cable, which I think
is about the same as CAT 5 on a 1000 foot roll per foot.




-----Original Message-----
>From: William Beals <will at beals5.com>
>Sent: Jan 12, 2007 8:47 PM
>To: 'TAPR Weather Station SIG Mailing List' <wxsig at lists.tapr.org>
>Subject: RE: [wxsig] b4 I buy?
>
>John:
>
>Rich is right on the temperature sensor.  In addition to his 
>suggestion, there are plans on the T238 website 
>(http://www.beals5/com/wx) that have an even more home-brew solution.
>
>As to justifying the T238, another one you can throw into the computer 
>argument is that a computer running 24/7 probably will use up about 
>$5/mo in electricty alone!  I'd also hope that I can credibly claim 
>that the T238 is a lot more reliable than a PC too.
>
>will
>
>-----Original Message-----
>From: wxsig-bounces at lists.tapr.org 
>[mailto:wxsig-bounces at lists.tapr.org] On Behalf Of Rich Mulvey
>Sent: Sunday, January 07, 2007 9:51 PM
>To: TAPR Weather Station SIG Mailing List
>Subject: Re: [wxsig] b4 I buy?
>
>John Yost wrote:
>> I'm ready to jump into this automated wx stuff.
>>
>> But, I'm a little confused as to what I need to get started. Just the
>> T-238+ and the Weather Instrument Kit.
>>
>> Or, is there more I need?  Of course, I know I need some hookup wire 
>> and misc items, I'm talking about any of the other kits.
>>
>> The XYL also wondered why I would want to "buy a kit"
>> instead of the pre-made sensors the aagelectronica sells.
>> I told her for the fun of building it and that the
>> T-238 also provides the display without the need for a computer.
>>
>> Any suggestions are really appreciated.
>>
>>   
>
>
>   The AAG Weather Instrument isn't a "kit" in the sense you appear to 
>think
>- the only thing you have to do with it is seal the edge with some 
>silicone and put in a few screws.
>
>   Be warned that the temperature sensor inside the weather head is all 
>but useless.  Since it's totally sealed, it will report incorrect 
>temperatures most of the time.  For accurate temperature measurement, 
>you will want to get a separate temp sensor and an appropriate 
>enclosure - there are lots of plans for inexpensively made sensor pagodas
on the web.
>
>   For additional sensors, I recommend the ones from 
>http://www.hobby-boards.com/ over those from AAG.  I've bought from 
>both places over the years, and the Hobby Boards stuff is better 
>constructed, in my experience.  You can purchase most of them as either 
>kits, or pre-assembled.
>
>- Rich
>
>
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>
>
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