In our case Arduino is the master and 3 x TC74 sensors are the slaves. As you can see in the schematic all three TC74 sensors have their SDA and SCL pins connected in series to pin A4 and A5 on the ...

Arduino is a great way for ... Analog pin A4 is for the temperature sensor, digital pin D2 is for the infrared receiver module, and digital pins D4, D7, and D8 handle the LED display. Looking at the ...