'Nearly FREE...Bar Code Readers'
Mark G. Forbes
|I've got about 100 circuit boards that could be used
for bar code readers, or anything else that needs to
reflectively detect light and dark.
A Hewlett-Packard HBCS-1100 bar code reader head, with
emitter and detector, and focusing optics, is mounted
at the end of a 1" x 2" circuit board. Two .150 diameter
mounting holes provide a means of physical attachment.
The reader feeds a current-to-voltage converter (LM358N)
which in turn feeds a LM311N buffer stage for logic-level
outputs. A 3-pin polarized connector (.100 centers, .025sq pin)
is mounted coplanar with the board to provide the interface.
Pin 3=Output 5V=Black, 0V=White
These detectors go about $8 in volume, more if you buy just
a few. With the board and such, they're worth even more.
I'd like to get $2 for each one, mostly to cover postage. Any
surplus goes to the PICLIST fund. I'll throw in a nice-looking
schematic, too. As with most of these things, it's first-come,
first-served. If you're not in the USA, you'll need to provide
equivalent local currency....not that I'm going to convert it,
but I figure it's my one chance to get some samples of money
from far corners of the planet.
If you want a bunch of them, let me know by email and I'll
figure out what the cost will be. If you decide it's just
what you need for a product or something, I'll be happy to
throw in the Gerber files for the board layout so you can
make thousands of them. :-)
We were going to use these in a product, and then it got canceled.
Seems you really can't count on the vast majority of people to
insert a card smoothly enough to read a barcode. If you're going
to do that, you need to wait for full insertion, then use an
imaging-type reader to grab the whole barcode at once. Oh, well.
*DON'T* send me email on this! If you want one or more, send
the bucks. IF YOU SEND ME EMAIL ASKING FOR ONE, I WILL IGNORE IT.
The exception is volume-quantity requests.
Use my work address, and be sure to include your return mailing
address. I'll bulk 'em up and ship 'em out in a couple weeks, or
whenever I run out. If I get close to running out, I'll post a
note to that effect.
Mark G. Forbes, R & D Engineer | Acres Gaming, Inc. (541) 766-2515
KC7LZD | 815 NW 9th Street (541) 753-7524 fax
peak.org | Corvallis, OR 97330 forbesm
"There has been an alarming increase in the number of things I know nothing
Mark G. Forbes wrote:
I have sent you a check for $20 to cover 10 units. Thanks.
NOTE: remove asterisks from email address to reply directly
Paul Mathews, consulting engineer
non-contact sensing and optoelectronics specialists
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