This lamp can work up to 2.5 hours at 100% power. It weighs about 2 kilograms. I managed to collect this lamp for 2500 rubles. The most expensive is the LED and batteries.
I bought all the components in China, so I’ll leave a link next to each component.
For assembly we need:
- LED 100 vvat
- 8 18650 batteries (in this case, a capacity of 2600 mAh)
- Charging and protection board YH11047A
- Voltage converter board 12-32v
- Cooler 12v
- Radiator
- Lock button
- Button without fixing
- Charger 16.8v. 2A
- Lens and reflector
- Thermal grease
- The wire
- Digital voltmeter
1. We drill in the radiator 4 holes for the LED. We apply a thin layer of thermal grease and fasten the LED. I used thermal paste-glue, so it will be stronger. We solder the wires to the LED.
2. Putting the batteries together. For the connection, I used superglue and soda. After assembling in a heap, we connect 4 assemblies in series, in each 2 batteries in parallel. Such batteries cannot be soldered, so I used conductive glue. I glued the wires to the batteries and on top a drop of superglue with soda for strength. As a result, you should get an assembly at 16.8v and a capacity of 5200 mAh
3. We solder all the boards, LED, cooler and batteries. Do not forget to solder the voltmeter through another button to monitor the voltage of the batteries.
The scheme by which you need to solder. Do everything carefully! 1 error and batteries may short-circuit!
4. I printed the case on a 3D printer.
I will leave a link to 3D model cases with a cover.
Inside the case, I fastened everything with clamps and super glue with soda.
Total:
I turn on the lamp in the courtyard at night.
It shines about 30-45 meters.
I advise you not to save on a radiator and a cooler. It is very hot, but you need to keep the temperature below 60 degrees. I saved and you can’t shine for longer than 20 minutes (in my case). Take a bigger radiator!