Laterne

thingiverse

Lantern for Field Days, Camping, as Working Lamp on Desk Etc. Uses four single-switchable LEDs and an internal battery. I am using 3-watt LEDs and four 2-ampere-hour batteries, so I can use all four LEDs for two hours or one single LED for eight hours. The LEDs are glued to the heat sink. Maybe you should isolate the heat sink from the reflector if you use PLA. There is space for four lithium-ion batteries in the base. If you need more space for soldering or bigger batteries, you need to add three to five millimeters or just cut the inner wall for the batteries. In the reflector, there is enough space for wiring, switches, and resistors. BOM: - 100 by 100 millimeter heat sink - Four M4 by sixty millimeter screws with washers and nuts - Four LEDs (with small heat sink) - Four suitable resistors for four point two volts (minimum one watt) - Four switches with five to six millimeter diameter - Four eighteen-sixty-five lithium-ion rechargeable batteries - USB charger board - Thick enough wire, and a little hot glue for the charger PCB - Approximately thirty centimeters rope - Thermal conduction adhesive (for LEDs) Please don't use lithium-ion batteries if you don't know how to charge and handle. Lithium-ion can be very dangerous if you connect it with different charges. Always use resistors for your LEDs. I am using three-watt LEDs each with zero point four seven ohms one watt resistors. Choose the right resistors for your LEDs!