The hardware electric circuit mainly includes the 80C51monolithic integrated circuit,the temperature examination changesdelivers,the ADC0809 modulus switch,the output control,thetemperature demonstration and the keyboard control circuit.

• 硬件电路主要包括80C51单片机、温度检测变送、ADC0809模数转换器、输出控制、温度显示和键盘控制电路。