Arduino Fire Detection Using IR Obstacle Sensor (DIY Flame Sensor Hack) Have you ever started an Arduino fire alarm project only to realize you don’t have a dedicated flame sensor module? Instead of stopping your project or waiting days for delivery, you can actually convert a common IR obstacle avoidance sensor into a basic flame detector. This simple DIY electronics project is perfect for beginners learning Arduino, robotics, IoT, and sensor-based automation. 🔥 How Does It Work? An IR obstacle sensor normally works by: Sending infrared light from the clear IR transmitter LED Receiving reflected IR light using the black IR receiver But for flame detection, we can disable the transmitter and use only the receiver. A flame naturally emits infrared radiation, and the black IR receiver can detect this. Components Required Arduino UNO / Nano IR Obstacle Avoidance Sensor LED 220Ω Resistor Breadboard Jumper Wires Black Electrical Tape USB Cable Step 1 — Modify the IR Sensor Locate the...