🛠️ MAKER GUIDEMay 20, 2026•⏱️ 1 min read•🇳🇵 Tested in Nepal
DIY Pocket Audio Amplifier with PAM8403 3W+3W & 18650 Battery
Assemble an ultra-compact, high-efficiency Class-D stereo audio amplifier with volume potentiometer and USB-C lithium charging.
🛠️ BILL OF MATERIALS (BOM)
Required Hardware & Component Checklist
Curated components verified for this project. Check the items you need, adjust quantities, and add straight to cart:
Estimated Total (5/5 items):
NPR 780
✓ Cash on Delivery across Nepal
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NPR 120
NPR 300
(NPR 150 ea)
NPR 90
NPR 200
NPR 70
DIY Pocket Audio Amplifier with PAM8403 3W+3W & 18650 Battery
The PAM8403 Class-D Stereo Audio Amplifier Module (3W+3W) runs with >90% power efficiency directly from a single rechargeable 18650 3.7V 3000mAh Lithium Battery and TP4056 Type-C charger.
Hardware Bill of Materials:
- Audio Board: PAM8403 5V 2-Channel USB Power Audio Amplifier Board 3W+3W Volume Control
- Speakers: 2x 3W 4 Ohm 40mm Full Range Miniature Speaker
- Power Management: Type C TP4056 Charger + 18650 3.7V 3000mAh Battery + 18650 Battery Clip Holder
Circuit Pinout & Wiring Connections:
| PAM8403 Terminal | Target Connection | Function / Description |
|---|---|---|
| PAM8403 +5V / GND | TP4056 OUT+ & OUT- | 3.7V - 5V Direct Lithium Power |
| PAM8403 Audio L / R / GND | 3.5mm Headphone Jack (L/R/GND) | Stereo Auxiliary Line Input |
| PAM8403 LOUT+ / LOUT- | Left 3W 4Ω Speaker | Left Channel Class-D Bridge Output |
| PAM8403 ROUT+ / ROUT- | Right 3W 4Ω Speaker | Right Channel Class-D Bridge Output |
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