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Electronic vending machine

Source: InternetPublisher:吃掉星星 Keywords: power display power supply Updated: 2020/08/26

Electronic vending machine

 

 

The vending machine consists of seven integrated circuits and three displays. As shown in the figure, two 555 CMOS timing integrated circuits generate pulses. The integrated circuit is used to generate the clock pulses for the entire electronic vending machine. This pulse is coupled from the output (pin 3) to the clock input of IC4, IC5, IC6 and the display driver IC.

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