๐ ๏ธ MAKER GUIDEApr 28, 2026โขโฑ๏ธ 1 min readโข๐ณ๐ต Tested in Nepal
DIY Solar Emergency Lantern with Automatic Dusk-to-Dawn Night Switching
Build a durable, rechargeable emergency lantern that charges via a small solar panel during the day and turns on automatically when darkness falls.
๐ ๏ธ BILL OF MATERIALS (BOM)
Required Hardware & Component Checklist
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Estimated Total (6/6 items):
NPRย 770
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DIY Solar Emergency Lantern with Automatic Dusk-to-Dawn Night Switching
Charge an 18650 3.7V 3000mAh Battery from a 5V 1W Solar Panel via the TP4056 USB-C Charger, stepping up voltage with an MT3608 Boost Module to power a 1W LED bead at dusk.
Hardware Bill of Materials:
- Solar Panel: 5V 1W Mini Solar Panel Photovoltaic Cell DIY
- Charging Module: Type C 5V 1A 18650 TP 4056 Lithium Battery Charger Module
- Battery: 18650 3.7V 3000mAh Lithium-Ion Battery + Single 18650 Battery Clip Holder
- Voltage Boost: MT3608 2A DC-DC Step Up Boost Converter Module
- Light Source: 1W Warm White High Power LED Bead
Circuit Pinout & Wiring Connections:
| Component Terminal | Target Connection | Function / Description |
|---|---|---|
| Solar Panel (+ / -) | TP4056 IN+ & IN- | Solar Harvesting Input |
| TP4056 BAT+ / BAT- | 18650 Cell (+ / -) | Lithium Charge & Discharge Protection |
| TP4056 OUT+ / OUT- | MT3608 Boost IN+ & IN- | Battery Powered 3.7V Input |
| MT3608 OUT+ / OUT- | 1W LED Bead (via 2.2ฮฉ Resistor) | Stepped-Up 3.4V High-Power LED Drive |
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