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How To make an magnetic Ink Scanner? Answered

I'll be wanting to make this for my vending machine project but I can only get to work with coins not bills, my problem is that it does not identify if it's a 1$ bill of a 5$. my Research concludes that magnetic ink scanner is the most used ways to read a bill and identify its value.

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Quadrifoglio

Best Answer 2 years ago

I looked at the MICR (magnetic ink character recognition) heads and thought they looked like cassette tape music player heads. Then I found this article that confirms it “magnetic heads (like the ones in a cassette tape recorder)” http://money.howstuffworks.com/question269.htm, Cassette tape music players are incredibly cheap at second hand stores I didn’t see anything related to the expected frequencies for each bill.

http://www.nytimes.com/1999/04/08/technology/in-vending-machine-brains-that-tell-good-money-from-bad.html is an interesting article on the evolution of money validation.

https://www.quora.com/How-does-a-currency-U-S-dollar-bill-reader-operate also has some interesting info.

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GroverRQuadrifoglio

Answer 2 years ago

what a very good research. Thank you so much for sharing..I Will use this for some references or maybe think of a new idea using those articles.

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Yonatan24

2 years ago

I haven't found anything online. Are you sure that this is a project that can be built at home?

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GroverRYonatan24

Answer 2 years ago

I'm just looking for a device that I can built that can Identify a 1$ bill and a 5$ bill.. if you know another way of doing that then it would be a great thing to share.. :)

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rickharris

2 years ago

I guess you can red a strip down the center as if it were a bar code. I assume all bills are different in pattern. Getting a sensible signel however may require sophisticated electronics as I assume the bills are NOT magnitized . your in the realms of something like a floppy disc reading head.

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Quadrifogliorickharris

Answer 2 years ago

USD, Britush Pounds, Australian Pounds. Canadian Dollars and Euros all have magnetic ink. So do higher end counterfeit bills. Current bill readers do have sophisticated electronics and employ multiple technologies simultaneously. Strip reading and comparison to a "map" can be one of them.

Counterfeit bill detection is not a casual activity and can be compared to virus vs antivirus.