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Subject: Re: Designing a barcode reader
Date: Sat, 28 Sep 2002 22:45:45 +0800
X-Newsreader: Forte Agent 1.7/32.534
You maight take a look at:
for a start
On Sat, 28 Sep 2002 10:47:45 +0100, "Philip Pemberton"
> I'm currently thinking about building a simple (Code39 only) barcode
>reader. Has anyone got some information on suitable methods for detecting
>and decoding said barcode? I was thinking about using a high-brightness red
>LED to illuminate the barcode. A lens will focus the resulting barcode onto
>a phototransistor with a metal sheet wrapped around it with a small pinhole
>in the middle. Is this how most barcode wands work, or do they use
>fiberoptics to route the light around?
> I've pulled a Cuecat to pieces before and I've seen some of
>Digitalconvergence's patents (thank you EspaceNet) but I'm still thinking
>about how I could decode the data. Would a PIC16F84 RISC MCU running 10MHz
>with 64 bytes of RAM be able to do it or will I need some more RAM?
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