# Fifth Lichuang Electronic Design Competition# Micro-pressure difference transmitter for building fire protection

1. Project Introduction
1. Xie Zhaoyan, an electronics enthusiast, is currently a university teacher.
2. The building fire protection micro-pressure differential transmitter realizes accurate monitoring of the pressure difference, controls the positive pressure value of the pressurized air supply through the bypass valve, and cooperates with the positive pressure air supply equipment to control the residual pressure of the building escape stairs. When a fire occurs, it can be ensured that the residual pressure value in the smoke escape stairwell is 40Pa-50Pa, and the residual pressure value in the front room, shared front room, fire elevator room front room, and closed refuge floor (room) is 25Pa-30Pa. This system can not only ensure that smoke and heat cannot invade in the event of a fire, but also ensure that people trapped in the fire area can successfully open the door and enter the smoke prevention area.
3. The main control chip used in the project is PBSTM8-003, which is a customized chip and can be replaced by PB331+STM8S003; the link of PB331 in Lichuang Mall is: [https://item.szlcsc.com/356348.html](https://item.szlcsc.com/356348.html ://item.szlcsc.com/356348.html)
2. Debugging process
1. Photo of PCB after welding
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