I actually found some off-the-shelf scientific scales that will work through
my lap-top but will await "Moderator" approval to discuss them further.

-----Original Message-----
From: [email protected] [mailto:[EMAIL PROTECTED]
On Behalf Of Bob Kennedy
Sent: Thursday, June 05, 2008 5:31 PM
To: [email protected]
Subject: Re: [BlindHandyMan] Accurate scale


The Science for the Blind site started by Tom Benham is now captek talking
tools captek.net

It's expensive there too but they are willing to invent to work with you...
  ----- Original Message ----- 
  From: Tom Fowle 
  To: [email protected] 
  Sent: Thursday, June 05, 2008 2:00 PM
  Subject: Re: [BlindHandyMan] Accurate scale


  Lary,
  About the only two ideas I can suggest are:
  1. O-house digital scales used to come with serial ports, which could be 
  read with braille-n-speaks or any talking computer. They were, maybe 10
years ago,
  very good and quite expensive, but if you need 1 gram, it's gonna cost.

  2. if no luck there, check with Tom Benham's wife Lee, who may still be 
  operating his company science products for the blind
  in Balacynwyd PA.

  Generically, a scale that does what you want with a serial port is your
most
  likely bet, as actual talking scales with that kind of accuracy are 
  unlikely.

  Of course you could check with the KNFB reader people and see if
  they're still claiming the thing can read digital displays, but
  I wouldn't spend my money without pretty good evidence.

  If you have no luck, get back to me and we'll do some looking around
  also.

  I have a very inexpensive chinese ballance got from Harbor Freight a few
  years ago with a 1/4Oz weight. with a little care it resolves to that
  weight easilly and is easy to check tactally, but that's still 7 grams.

  Of course I have no real idea of the actual accuracy of the weights,
although
  compairing them to a postal scale they seem to agree.

  tom Fowle
  Smith-Kettlewell RERC



   

[Non-text portions of this message have been removed]


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