Thermometer Alert Kit with Arduino Uno + LED
Build Your First Digital Thermometer With Arduino Uno and Instant Visual Alerts
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
From a sweltering summer day to a science fair challenge, understanding temperature is a perfect first sensor project. This kit equips you to read real-time ambient heat with an LM35, display it on a crisp LCD, and trigger a red LED the moment a chosen threshold is crossed — exactly the kind of functional system that sparks deeper curiosity in weather monitoring and environmental sensing.
What You'll Build
You assemble a fully working thermometer that shows current temperature in Celsius on a 16x2 LCD. With onboard tactile buttons, you define a heat limit. Once the temperature rises past that point, the red LED glows unmistakably while the green LED stays lit under normal conditions — a practical alert system ready for classrooms, server rooms, or a simple home science setup.
What You'll Learn
- How to read analog voltage from an LM35 and convert it into meaningful temperature values
- How to connect and program a 16x2 LCD through an I2C backpack, reducing wiring complexity
- Using conditional statements in Arduino C to compare sensor data and drive outputs like LEDs
- Implementing user input via tactile buttons to adjust settings on the go
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| LM35 Temp Sensor | 1 |
| 16x2 LCD HD44780 | 1 |
| I2C LCD Backpack | 1 |
| 5mm Red LED | 2 |
| 5mm Green LED | 2 |
| Tactile Button | 2 |
| 10kΩ Resistors | 5 |
| 220Ω Resistors | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 20 |
| 9V Battery Snap | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Young makers aged 8–15 diving into their first real sensor project, including CBSE Class 7–10 students and ATL Tinkering Lab participants. It’s also a ready-to-go STEM activity for teachers conducting weather-awareness workshops or parents looking for a structured, no-guesswork introduction to Arduino and environmental monitoring.
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.
What if I get stuck during the build?
Scan the QR code to open the AI companion that walks you through wiring and code; you can also send a photo on WhatsApp for quick human guidance if needed.
Can this kit be used outdoors to track weather?
Absolutely. The LM35 works reliably in ambient air. Just shield it from direct rain and extreme humidity, and you’ll have a solid weather-logging base.
What threshold temperature can I set?
The two buttons let you increase or decrease the setpoint in 1°C steps, displayed instantly on the LCD. You can define any threshold from room temperature to local summer highs.
Is this suitable for a school science exhibition?
Yes, it demonstrates sensor integration, visual output, and real-time decision logic — a complete, impressive project that fits CBSE topics on heat and measurement.
LM35 reads temperature and shows it on LCD. Red LED fires above set threshold. First sensor build.
What's in this kit
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items