用1602、stc89c52单片机，ds18b20温度传感器实现，四键调时，液晶屏显示温度时间，30度以上红灯亮，0度以下黄灯亮，其余温度段绿灯亮，内含proteus原理图-By 1602, stc89c52 microcontroller, ds18b20 temperature sensor, four-button adjustment of the LCD screen displays temperature-time, the red light above 30 degrees,