- A cheap very simple solar lamp. Can be 3D printed, or built in a glass jar.
- Automatically switch on/of the light when night/day comes
- Solar
- Can be switched off manualy, and used as a torch
- Printable circuit board (KiCad), can easily be done on perfboard too.
| Name | Quantity | Description |
|---|---|---|
| QX5252 | 1 | https://datasheetspdf.com/pdf/719492/Qxmd/QX5252/1 |
| AAA_holder | 1 | AAA battery holder |
| Solar_panel | 1 | 60x60 mm, 5V |
| 5mm LED | 1 | 20mA LED |
| 330uH | 1 | Inductance DIP (1) |
| Switch | 1 | 20mm, toggle, on/off (2) |
| 5mm LED support | 1 | RTM5021 |
(1) Inductance values control the currant going trough the LED, according to this table. The default value is 330 uH. Lower inductince will increase light brightness and decrease battery duration.
| Inductance (uH) | Current (mA) |
|---|---|
| 330 | 11 |
| 270 | 14.5 |
| 220 | 15.5 |
| 150 | 25 |
| 100 | 34.5 |
| 82 | 38 |
| 56 | 50 |
| 47 | 75 |
| 33 | 110 |
(2) The switch is mounted in series with the LED
This project is licensed under the LGPL-v3 license.