Are you still doing the dishes yourself? Teach you how to make dishwasher controller with single chip microcomputer

Design brief ：

 

This design is a dishwasher controller based on MCU , It mainly realizes the following functions ：

• LCD1602 Show the temperature 、 Maximum temperature and state
• Press the key to set the maximum temperature
• The dishwashing process ： inlet --> heating --> Drainage --> rinse --> dry --> end
• You can pause by pressing the key during the dishwashing process 、 Start or end cleaning directly
• If the temperature is higher than the maximum value during dishwashing , Clear end , And display "Warning"

label ：51 Single chip microcomputer 、LCD1602、DS18B20、 Water level sensor

design sketch ：

 

General information ：

 

Schematic diagram ：

 

Software design process ：

 

 

 

System diagram ：

 

This design is based on STC89C52 Single chip microcomputer is the core controller , The whole system of dishwasher controller is composed of other modules , It contains the central control part 、 Input part and output part . The central control part adopts STC89C52 Single chip microcomputer , Its main function is to obtain the input data , After internal treatment , Control output section . Input consists of three parts , The first part is DS18B20 Temperature acquisition module , The module can detect the current temperature value ; The second part is the water level detection module , The module detects the current water level ; The third part is the independent key , Switch the interface through three independent keys 、 Adjust temperature max 、 Switching starts / Pause 、 Reset . The output consists of seven parts , The first part is LCD1602 Display module , The module can display the temperature 、 Perform steps, etc ; The second part is the water inlet relay , This module simulates the dishwasher water inflow state ; The third part is heating relay , This module simulates the heating state of the dishwasher ; The fourth part is the drainage relay , This module simulates the dishwasher drainage state ; The fifth part is the washing relay, which simulates the washing state of the dishwasher through this module ; The sixth part is LED, The seventh part is the buzzer , When the dishwasher is finished 、 When the temperature is greater than the maximum temperature , Sound and light alarm .