PREVENTING METHOD AND SYSTEM FOR VENDING MACHINE'S SURPLUS MONEY UNWITHDRAWING

摘要

The system comprises the central control unit for controlling the entire program, the timer and counter circuit for counting sold items and controlling time according to the signal from the CCU, a switch for checking whether or not the coins are with drawn and informing CCU of the result, another switch for checking whether or not the item is withdrawn and a buzzer for giving off an alarm to inform the user that the change is still not taken out.