Barcode reader. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Barcode reader. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Computers

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This is actually the long-awaited subj .... People who asked for software, please do not worry, because there is none .... This project had the good fortune to be only at the development stage....

Step 1

We open the mouse. We observe there 2 wheels. One spins when moving along X, the other along Y. the scanner will move only along Y, the wheel rotating along X is removed .... The movement along Y will be standard (as in the mouse) bits of this movement will also be transmitted ....... And instead of coordinates along X, bits will be transmitted black White. The movement speed will be controlled by the amount of rotation of the Y wheel.

Step 2

The LED and the photodetector must be moved apart by ~ 20 mm, and between them place 2 optical fibers with a diameter of ~ 1-2 mm (see Fig. 1) The angle between the normal and the optical fiber must be exactly 45 degrees. At the bottom of the mouse, you need to make a hole for the optical fiber. (see pic 2)

Step 3

Hy, that's almost all! Let's explore the transfer protocol from the mouse to the com port:

Y coordinates as in the standard driver. Instead of X coordinates, signals are transmitted (black - high / white - low level (ny or vice versa;) )) button bits are also the same ...... So write software more or less John

Threat Who gets what / what problems - write! Or better call!

Home# 51-71-76

... . It's interesting to convert the mouse into a mini-reader then ..... ->

---GoldEd 2.50.a+

Origin: John Chertihin, Black BBS, Ekaterinsburg, Russia. (2:5080/52.19)

Publication: N. Bolshakov, rf.atnn.ru

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