Graduation project based on 51 microcontroller vending machine design (schematic simulation source program, etc.)

Vending machines are an important application of automation technology in people's lives. As people's quality of life continues to improve, the performance requirements for vending machines are getting higher and higher. The main function of the vending machine is to complete the vending process through human-machine dialogue.

This article designs a vending machine with the 80C51 microcontroller produced by INTEL as the core, and introduces in detail the overall system design scheme, hardware selection basis, software usage methods and techniques of the vending machine. The 80C51 is used as the CPU processing unit to connect various functional modules; the 4*4 matrix keyboard is used as the input control module to select the type and quantity of goods and the simulated currency input function; the LCD1602 liquid crystal is used as the display module to display the current shopping status and currency. Status; LED display is used to indicate the status of the currently selected goods and shipment. Connect each module through the Protues7.5 microcontroller circuit schematic diagram; then use Keil uVision3 professional compilation software to complete source program compilation and debugging, and finally conduct experimental circuit simulation of the vending machine to simulate vending. Combining working principles, system design, software compilation and experimental simulation to realize the related function of automatic vending.