[Sun Yat-sen University Competition] Portable temperature measurement system

Team Information: Solo Team: Deng Kaiyun
Award Information: Third Prize in the Electronic Design Competition of Sun Yat-sen University
Overview: This portable temperature measurement system uses Arduino as the development board, combined with the DHT-11 temperature and humidity sensor, buzzer, LED lights, and buttons. Temperature alarms and temperature threshold regulation.

Overall system block diagram
(1) Main control board: This design uses Arduino uno board as the main control board of the entire system.
(2) Selection and discussion of system components:
① Selection of components
The components used in this design are:
LCD display with IC2 interface,
buzzer,
LED light
button,
DHT11 temperature and humidity sensor,
1KΩ resistor,
330Ω resistor
② Discussion on the selection of temperature sensor.
This solution initially used the LM35 temperature sensor to measure the temperature. However, because the LM35 temperature sensor has been unstable during use, the DHT11 temperature and humidity sensor was used instead. In this way, the stability of the system was improved. improved.
③The selection of LCD screen is discussed.
The LCD screen used in this solution has an IC2 interface, which greatly reduces the number of wiring and improves the stability of the system.