Tip 1: How to draw barcode

In the past posters on technological progress, often portrayed puncher.Today, one of the symbols of the advanced technology was the bar code.But how do you properly portray him on the poster?
Guide
1
Take a look at these bar codes.Today them need not go far - they are available in almost every package.Check out their component parts: strips of different thickness, figures.Note that some of the bands slightly longer than the other, but only on the lower side (where the figures).Also note that the numbers can be either eight or thirteen.But there are also non-standard bar codes.
2
never depicted on the poster bar code in the normal orthographic projection.He will look unnatural.Draw one or another object on which a code is usually placed so that the latter is located sideways.If the surface of the object at the place where the code is located is bent (e.g., paper), then the code should follow the shape of this surface.
3
Having described the object, thin, barely visible lines of pai
nt on the location of the bar code parallelogram is repeated in the form of a reduced projection of the side wall of the subject.Then, looking at any real bar code, enter in the same parallelogram.If you wish to use for the image lines of a conventional line.Do not try to transfer the code exactly, just do some other line thickness, and the first, middle and last - a little longer.The figures under the code write randomly selected, but their number must be the same as under the present code.The first figures for plausibility should match that of a State (for example, Russia - 46).
4
Take an eraser and gently erase a parallelogram, without deleting the barcode image and other parts of the picture.If necessary, restore shading or coloring, if it is in removing the parallelogram in any way damaged.
5
There are also so-called 2D-codes.They are more modern than barcodes and carry more information.This code is depicted on the poster, and after referring to the fact it looks like the real thing.

Tip 2: How to read a bar code

bar code applied to the packaging of the goods in order to provide information on the products sold.Various data is encrypted a certain set of numbers.Knowing how to read a bar code, you can get a lot of useful information about the product.
How to read a bar code
Guide
1
Look at the first two or three digits in the bar code on the product packaging.They report on the country of origin.Each country has a specific set of numbers.For example, Russia is 460, and for Ukraine - 482. The detailed tables of country codes can be found at one of the sites devoted to the subject.
2
Note the following four or five digits in the bar code, they shall notify the manufacturer.Databases are inaccessible to such information by ordinary consumers, so this information often use wholesalers.
3
Take a look at the following five digits of a barcode.It - encrypted information about the product.The first digit refers to the five product name, the second - consumer properties, the third - the size, the fourth - the mass, the fifth - the color.However, to use these data is typically the buyer is unlikely to succeed, becauseThey are designed primarily for large firms-buyers.
4
Look at the last digit of the bar code - is the check digit of the goods.On it you can determine the authenticity of the product.To do this, follow these steps:

Calculate the sum of digits in the bar code on the even-numbered positions;
multiply the amount received in the first paragraph, 3;
add up all the numbers that stand in odd places, without taking into account the check digit;
get the sum of the numbers, get in paragraphs 2 and 3;
drop in the resulting sum of the number of tens;
subtract the number of 10, which turned out in paragraph 5;
A comparison of obtained in step 6 with the reference number in the bar code.If they do not match, in front of you fake goods.
5
Use different computer programs to check the authenticity of the goods at the bar code and product information.Go to related web sites and use these programs in a mode on-line.