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Post has been Killed

How do vending machines figure out if coins are fake or not?

submitted by SFOGuy

8 years 7 months ago

I always wondered this; and I think the machines used to be less sophisticated.
Also---the second half is sort of cool---on how the snacks are dispensed and measured. Feedback design (the beams the falling snack breaks) should ensure that you always get what you paid for with your (real) coins.

I wonder how bill detectors work?

From the Science Channel...

9 Comments

*dupeof=http://videosift.com/video/How-do-vending-machines-figure-out-if-coins-are-fake-or-not-1

Video cannot be declared a dupe of the specified video - ignoring dupeof request by kulpims.

*isdupe

Oops

Video has not been nominated as a duplicate - ignoring isdupe request by SFOGuy.

Great, you've given Sifty an aneurysm.

Jerks.

*kill

Permanently discarding this video - kill requested by SFOGuy.

*dupeof=http://videosift.com/video/How-do-vending-machines-figure-out-if-coins-are-fake-or-not-1

Video cannot be declared a dupe of the specified video - ignoring dupeof request by chicchorea.

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