how do the barcode scanner reads or detects the barccode

[teao]

what are the components of a barcode scanner?how do scanner reads the data or code.can you help me?

 

[percramer]

What do you need to know? Barcodescanners are usually connected to the serial port or the keyboard port. They send normal character data, mostly followed by a ending character. If you connected one to your keyboard port and scan something in for example word, you will recieve some letters. And if it is one connected to the serial port then you will need to read the serialport buffer. But it is easy. Ok there are also usb version, but they work almost the same ;-)

Is that what you needed to know? Or did you want a technical description of the inner working of a barcodescanner?

Gr,

Per

 

[chiph]

You might want to read:

http://electronics.howstuffworks.com/upc.htm

Chip H.