Arduino DHT11 Temperature & Humidity Monitor with Relay Fan Control (LCD, STEM / FYP)
A smart climate monitor on Arduino: a DHT11 sensor reads temperature and humidity, shows them on a 16×2 LCD, and a relay automatically switches a DC fan on when it gets too hot — a genuinely useful automation project.
This project is a complete little climate-control system. An Arduino Uno reads a DHT11 sensor for temperature and humidity and displays them live on a 16×2 I2C LCD. When the temperature crosses a set threshold (e.g. 40°C), the Arduino triggers a relay module that switches a DC fan on; when it cools down, the fan switches off. It is a clear, real-world demonstration of sensing plus automatic control.
What is included
- Arduino Uno board
- DHT11 temperature & humidity sensor
- 16×2 LCD display with I2C module
- Relay module (5V)
- DC fan (load)
- Power supply, wiring and USB cable
- Assembled, demonstration-ready project
Great for
- Final year projects (FYP) and semester submissions
- School and college electronics / IoT exhibitions
- Learning sensors, thresholds, relays and LCD on Arduino
- Smart-home and automatic climate-control demonstrations
What it teaches
Reading a DHT11 sensor, threshold logic, driving a relay to switch a real load, and I2C LCD output on Arduino — a practical automation project. Building your own? Start with an Arduino Uno and browse sensors and smart home parts.
Why buy from Arduino Corner
Complete, tested project kits at the best prices in Pakistan — ideal for school science exhibitions and final year projects (FYP). Visit us: Arduino Corner, Shaheen Market, DAV College Road, Rawalpindi. We ship across Rawalpindi, Islamabad and all of Pakistan with cash on delivery. Browse more STEM Kits & Projects or read our FYP project ideas guide.
