Science to enjoy with credit card magnetic stripe

Essences of "science" and "technology" are packed in casually used in everyday life, and even if there is no practicality in discovering it, the excitement of evoking intellectual curiosity It is common to get it. Experiments are being conducted to rediscover the scientific elements packed in old credit cards with simple tools.

Another Science Experiment «Tetherd Cow Ahead
http://www.tetherdcow.com/another-science-experiment/

It is sand iron to prepare. Even iron oxide, so-called red rust powder is OK even if it is not iron sand.


With a powerful magnet ......


It is surprising that not only sand iron but also red rust can be drawn. Since aluminum or copper powder does not stick to the magnet, it is NG.


Experiment target credit card. Use thick strips of magnetic stripes that were once commonly used.


When applying red rust powder to the magnetic stripe part of the credit card, the red rust is aligned according to the barcode.


If you magnify with a magnifying glass this street. Generally, data is input to three horizontal lines (tracks) in the magnetic stripe. The top line is the part called high density track. Although it is "high density", the amount of recorded data per inch is 210 bits. In this high density track only the cardholder's name, card number, expiration date will be recorded. The amount of data that can be written to three tracks is 1 kilobit, which is the amount of data corresponding to 226 characters of SMS.


The magnetic stripe of credit card is designed to maintain high durability, and it seems that magnetic data is kept even in a long time when it is not used.

Subsequent experimental subjects are "Shoo! TagProduct. It seems that this is a product that becomes a countermeasure against dogs and cats fleas, ticks and mosquitoes by electromagnetic charge tag of energy pattern such as coded frequency and wave of magnetic strip.


When sprinkling red rust on Shoo! Tag, the pattern emerges as well.


When enlarging it is like this.


Shoo! Tag does not clarify the mechanism of how fleas and ticks are brought down with a mechanism, but except for the red, blue and yellow parts of this figure, it is the area of ​​"null" where no data is contained So, it seems that the secret of Shoo! Tag is packed in the slight data of this colored part.


In addition to visualizing the magnetic area of ​​the card strip, there are people who are doing various "experiments". For example, a write motor magnet of a floppy disk drive is referred to as "Magnetic Viewing FilmAn interesting pattern emerges when you wear it with a special film called "


You can check the appearance of visualizing the motor magnet of the floppy drive with the Magnetic Viewing Film in the following movie.

Magnetic Viewing Paper - Featured on Hacked Gadgets - YouTube