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A fully functional Lego NXT Automatic Teller Machine (ATM) with change making capability. The machine is built 100% from Lego parts plus a HiTechnic IRLink and a Codatex RFID Sensor. The machine is programmed in Not eXactly C (NXC) and has the following features…

 Bill scanner can be calibrated to accept any type of banknote

 Machine accepts only the type of bill for which it is calibrated

 Tolerances for bill acceptability are adjustable directly on-brick

 Viewable histogram compares calibration and live data from bill scanner

 Functional numeric keypad uses a combination of touch and light sensors

 Entire customer database is restored from flash memory at startup

 Customer database is automatically saved after each transaction

 ATM card is retained if wrong PIN code is entered three times

 ATM card is retained after a period of inactivity

 Coin and banknote value can be configured directly on-brick

 Uses a custom created 9×13 pixel rotated text font

 NXT buttons function as selectors for menu options displayed on-screen

[via Brothers-Brick]

John Baichtal

My interests include writing, electronics, RPGs, scifi, hackers & hackerspaces, 3D printing, building sets & toys. @johnbaichtal

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