Build a Real-Time Colour Thermometer with Arduino Uno

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Turn temperature into art. This kit uses the LM35 sensor and an Arduino Uno to drive an RGB LED, instantly changing colour based on what the sensor detects. Blue signals a cold breeze, green a comfortable room, and red a hot surface. It is a striking display that also teaches the fundamentals of sensor programming and analog inputs — ideal for science fairs, classroom demos, or a child’s first hands-on electronics project.

What You'll Build

You will assemble a compact circuit on a breadboard that reads temperature continuously and lights up an RGB LED with a precise hue. No soldering required. When you hold a chilled object near the LM35, the LED glows blue; as it warms, the colour shifts through green into red. The result is an interactive environment monitor that doubles as a customizable light piece.

What You'll Learn

• Reading an analog temperature sensor with Arduino’s ADC
• Mapping real-world values (Celsius) to a colour range
• Driving an RGB LED with PWM for precise colour mixing
• Building a complete, standalone circuit powered by a 9V battery

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Young makers aged 5-15 who want to see science in action. Perfect for CBSE and ICSE students exploring sensor projects, ATL Tinkering Labs needing ready-to-run STEM kits, and parents introducing creative electronics at home. The code is simple enough for a beginner, yet the colour-mapping logic offers room to experiment for older learners and B.Tech ECE/EEE foundation labs.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.