DIY Fire Alarm Circuit Using Photodiode, Buzzer & Transistor | 9V Fire Sensor Project 🔥 #shorts

DIY Fire Alarm Circuit Using Photodiode, Buzzer & Transistor | 9V Fire Sensor Project 🔥

In this video, I’ll show you how to make a simple fire alarm circuit using a photodiode, BC547 transistor, LED, and buzzer. This project is powered by a 9V battery and instantly alerts you when fire or high light intensity is detected. Perfect for DIY home safety, school projects, or learning basic electronics.

✅ What You’ll Learn:
✔ How to detect fire or flame using a photodiode
✔ How to trigger a buzzer and LED alarm
✔ How BC547 transistor amplifies the signal
✔ How to build a reliable fire sensor with minimal components

🔧 Components Used:

1x BC547 transistor

1x Photodiode (flame sensor)

1x 9V battery

1x Buzzer (alarm)

1x LED (alert light)

1x 510Ω resistor

Few wires and breadboard

⚠️ Note: This circuit detects intense infrared light from fire, not smoke. Use with caution and don’t rely on it as your only fire detection method.

🎯 Perfect for:

DIY fire detector

Science fair projects

Beginner electronics learning

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Видео DIY Fire Alarm Circuit Using Photodiode, Buzzer & Transistor | 9V Fire Sensor Project 🔥 #shorts канала BK Samrat Electrician