Electronic Building Blocks DS18B20 Digital Temperature Sensor with Data Line The electronic building blocks DS18B20 digital temperature sensor with the data line Module power supply: 5VDC DS18B20 digital temperature sensor interface socket PH2.0 DS18B20 digital temperature sensor the pin definition :1 - Output 2 - Power 3 --- in DS18B20 digital temperature sensor to be used in conjunction with Arduino dedicated sensor expansion board, you can very easily achieve interactive effect related to the perception of ambient temperature