Does anyone know how to actually make a usable barcode without
software?

Apparently you can't just type the barcode numbers using a UPC barcode
font. It seems there some algorithm that these $300 software packages
run that alters the 2nd half of the barcode.

I've been searching google for the last two hours looking for this
algorithm and I've come up with nothing. Anyone wanna throw me a
{free} bone?

on 5/6/07 7:42 am, Dave wrote:

I had to do this to get an ISBN barcode, apparently you need to keep the
barcode as vector art and can't enlarge it widthways - only in height, but
from what I can gather there are rules [on books at least] where the barcode
can go and how it can look.

http://www.tec-it.com/asp/main/start...bmenu=BCOnline
&redirect=demo/playground.asp&LN=1

also
http://www.tux.org/~milgram/bookland/
http://www.barcode-us.com/info_center/bookinfo.htm
http://www.barcode-us.com/

HTH

I ran across this which was included with one of the shareware UPC
fonts I downloaded. I'm still not sure how I can make this work, but
this is exactly the information I was looking for so I can start
working on a way to piece it together.



The bars represent binary ones (1), while the spaces represent binary
zeroes (0). The characters on the left hand side of the symbol always
have odd parity, so the number of modules that are bars are always
odd, while the parity of the right hand side of the tag always have
even parity, and the number of modules that are bars on the right hand
side of the tag is always even.

The following is the table for the character patterns, for both the
left
hand and right hand characters.

UPC A Character Set

Left Hand Decimal Right Hand
Character Number Character\fN

0001101 0 1110010
0011001 1 1100110
0010011 2 1101100
0111101 3 1000010
0100011 4 1011100
0110001 5 1001110
0101111 6 1010000
0111011 7 1000100
0110111 8 1001000
0001011 9 1110100

The best method is to use a upc font such as this one:

http://www.morovia.com/font/ueb.asp

On Jun 5, 11:58 am, MontereySoft <i...@montereysoft.com> wrote:
I have several barcode fonts. The problem was it wasn't clear to me
at first that the bars on the left side of a UPC barcode are a
different format from the bars on the right.