[MCU club] design of blind water cup based on MCU [physical design]

Item number ：mcuclub-304
Design brief ：
Information download website ：www.mcuclub.cn
Project name ： Design of intelligent temperature control water cup based on single chip microcomputer
Single chip microcomputer ：STC89C52
Function introduction ：
1、 adopt DS18B20 Measure the water temperature in the water cup , When the temperature is higher or lower than the temperature range set by the user , Cooling or heating ;
2、 adopt TDS Test the soluble electrolyte capacity in the water cup , Prevent users from using water that is not suitable for drinking ;
3、 Press the key to set the timing to remind the drinking time , When the time comes , And use the steering gear to automatically open the cup cover ;
4、 Set the upper and lower temperature values by pressing the key 、 Manually switch the cup cover 、 Manual heating or cooling ;
5、 adopt LCD1602 Display water temperature 、 Timing time 、TDS concentration 、 Cup cover status, etc ;
6、 Each operation performed by the blind , Carry out voice broadcasting for through the voice module ;

Data preview
design sketch ：

Overall physical data ：

Schematic diagram ：

PCB:

Software design process ：

System diagram ：

This design is based on STC89C52 Single chip microcomputer is the core controller , Together with other modules, the whole system of the blind water cup is composed , 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 . The input consists of four parts , The first part is DS18B20 Temperature detection module , The module can detect the current water temperature value ; The second part is TDS Water quality detection module , The module can detect the current particle concentration ; The third part is the independent key , Switch the interface and adjust the timing time and temperature threshold through three independent keys ; The fourth part is the power supply circuit , Supply power to the whole system . The output consists of six parts , The first part is LCD1602 Display module , The module can display the current water temperature 、 Timed remaining time 、 Water quality particle concentration 、 Cup cover status and modification interface, etc ; The second part is the relay control heating plate , When the temperature is less than the set minimum , The heating relay is closed , The heating plate works , Heating ; The third part is the relay controlled refrigeration chip , When the temperature is greater than the set maximum , The refrigeration relay is closed , The refrigeration plate works , Refrigeration ; The fourth part is the steering gear , Simulate opening or closing the cover ; Part V voice broadcast , Every time a blind person performs an operation, he will make a voice broadcast , Such as setting the maximum temperature , Voice broadcast the current maximum temperature of the thermos cup .

Hardware list ：