Lego NXT ATM Machine with Change Maker

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 9x13 pixel rotated text font  NXT buttons function as selectors for menu options displayed on-screen

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