Your starter kit sensors are lying to you with total confidence.

Connect your UNO R3 to your computer and configure the ATmega328P's ADC to read its internal temperature channel. Then print the ADC result to the Serial Monitor. For a visually interesting ...

So you finally decided to hop on the Arduino bandwagon and start making electronic projects as a fun hobby. As a beginner getting started with Arduino, your first instinct is typically to buy a ...