MINI冰箱设计，利用DS18B20芯片实现温度探测和温度信号输入，利用4位七段数码管显示温度。当温度高于临界温度15°时，单片机则输出信号，通过继电器控制半导体制冷片及散热器工作，使冰箱实现制冷功能。-Using DS18B20 chip to achieve temperature detection and temperature signal input, the use of four seven-segment digital display temperature. When the temperature is higher than the critical temperature of 15 °, the microcontroller is the output signal, through the relay control semiconductor cooling and radiator work, so that the refrigerator to achieve cooling function.