Just make your favorite decoration and solder the components as shown in the schematic.
Component list:
- Variable resistor 800 KΩ
- Light dependent resistor 500 KΩ
- Any N-channel MOSFET with a threshold voltage of about +2 Volt
- Resistor 100 Ω (for the LED)
- White LED (you can use many)
- Lithium Battery
- Charger IC for lithium batteries. You can use any cheap Chinese charger circuit, as long as it has overcharging protection
Solder the components and glue them down using a silicone glue-gun
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