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bill readers...how do they work?(3 posts)

bill readers...how do they work?ColnagoFE
Oct 20, 2003 1:35 PM
does anyone here know how those bill readers on vending machines decide whether or not a bill is authentic and not just a piece of paper? and how can it tell the diff between a one and a five?
re: bill readers...how do they work?TJeanloz
Oct 20, 2003 1:40 PM
Apparently, bills are magnetic:

http://money.howstuffworks.com/question269.htm
thanks for the linkColnagoFE
Oct 20, 2003 2:35 PM
you learn something new everyday. i was just pondering this big question as i put a bill in the vending machine today.