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The stepbystep tutorial and STL files can be found here:
https://www.electromaker.io/project/v...
(THE STL FILES ARE AT THE BOTTOM OF THE PROJECT PAGE!)

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This Arduinopowered machine separates coins of different dominations and then tallies up their total value. This is shown on an 8 digit 7 segment display. Reflected infrared sensors (TCRT5000s) are used to detect the coins.