The LM35 temperature sensor and red led are powered with 5V from the Arduino board. As you can see in the sketch on the first line I included the LiquidCrystal library (header) that includes useful ...

This isn’t about connecting a temperature sensor in your Arduino. This build is about ... this documented feature that’s clearly in the datasheet seems not to be used by many people.

As indicated in the top silkscreen layout, the flat (labeled) side of the temperature sensor must face the bottom side of the multifunction shield fronting the three pushbuttons. Also, the legend ...