气压探测器原理图及PCB板，只需外接一个气压传感器即可实现气压数值的转换显示等，采用AVR ATMEGA-8L单片机及高精度AD芯片AD7798BRUZ实现，供参考。-The pressure detector schematic and PCB, just add a pressure sensor can achieve the conversion of pressure values, the AVR ATMEGA-8L Microcontroller and precision AD chip AD7798BRUZ achieved, for reference.