Introduction - If you have any usage issues, please Google them yourself
Functional introduction:
Using STC89C52 (STC89C52 Data Handbook) MCU design, there are 8 buttons, 3 buttons to simulate coins (5 yuan, 1 yuan, 5 jiao), and 5 buttons to simulate the selection of goods, a 12864 display.
Step:
The 1. boot starts to display the list of goods price, and automatically switches the list.
2. you can choose 1 - 5 kinds of goods (or more).
3. the goods are selected according to the corresponding keys.
4., after the selection, prompt the amount to be invested, and show the valid time of 30 seconds (can be modified).
5. button to simulate the coin, there are 5 yuan, 1 yuan, 5 corners.
6. the amount of money that is equal to or greater than the amount of the selected goods is purchased successfully.
7. if the money is insufficient, it will be returned automatically after 30 seconds.