🔦🎵 DIY Mini Emergency Light with Bluetooth Speaker
Why not enjoy light and music during a power outage? This DIY combo device combines a mini emergency LED light with a Bluetooth speaker, making it perfect for blackouts, camping, or travel.
🧾 Components Required
| Component | Purpose |
|---|---|
| 3.7V 18650 Battery | Power source |
| TP4056 Charging Module | Battery charging & protection |
| Boost Converter (5V) | Step up voltage for circuit |
| Bright White LEDs (3–5) | Emergency lighting |
| Resistor (100–220 ohm) | For LEDs |
| Bluetooth Audio Module (e.g., MH-M18 or XS3868) | Wireless music |
| Small Speaker (3W–5W) | Audio output |
| On/Off Switch | Power control |
| USB Cable / Port | Charging input |
| Small Enclosure Box | Final body casing |
⚙️ Circuit Overview
Lighting Section:
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Battery → Boost Converter (5V) → Switch → Resistor → LEDs
Audio Section:
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Battery → Bluetooth Module → Speaker
You can power both sections from the same boosted 5V line.
✅ Features
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Bright LED emergency light
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Bluetooth audio up to 10 meters range
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Rechargeable with USB charger
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Compact & portable
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Great for homes, study tables, or outdoor use
🛠️ Assembly Steps
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Fix LEDs in front and connect them with a resistor to boost converter output.
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Mount the Bluetooth module and speaker inside the box.
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Connect battery to TP4056, and output to the boost converter.
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Add a switch to control both light and audio.
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Secure all parts inside the box and test.
🔋 Charging Tip
Use TP4056’s micro USB port for charging. A red LED shows charging, blue means full.
🧠 Extra Ideas
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Add FM module for radio
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Include volume buttons or switch
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Add solar panel for charging in sunlight
🎯 Final Thoughts
This mini Bluetooth speaker with emergency light is not just practical—it’s a perfect blend of entertainment and utility. Ideal for students, campers, or anyone who loves smart DIY electronics!
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