Homemade LED flashlight at 1000 watts
For such a project, you need to purchase twenty LED arrays, each of which has a power of 50 watts. Such matrices are sold immediately with a built-in power driver, which greatly simplifies the creation of a home-made LED flashlight. With this option, the need for a separate purchase of power supplies for LEDs is eliminated; matrices can be connected directly to a network voltage of 220 V.
A large number of LED arrays will give off a lot of heat that needs to be removed. A radiator made of aluminum alloy, which is used in the heating system of buildings, is well suited for this. To place LED matrices on it, you need thermal grease.
First, each LED is connected by soldering the power wires. Then solder them all together in a parallel pattern. They do all this not on the radiator, since it will very quickly remove heat, which will not allow warming up the ends of the conductors.
After all the LEDs have been soldered together, the devices are transferred to an aluminum radiator. They are placed evenly on the surface of the radiators.
To connect the elements, you can arrange any kind of fastening, but it is easier to put all the LEDs on the thermal grease. In this case, the latter must be smeared on the surface of the radiator, pressing the device with the paste applied to their base and slightly moving them in different directions. The connection of the elements is reliable even in the absence of additional fastening.
Next, the flashlight is connected to the mains and tested. He gives a lot of light. But the heat generation by LED matrices is so great that even a heating radiator can not cope with its removal. After a couple of minutes of operation, the lamp heats up to 50 ... 80 ° C, while the power of the lighting device drops to 600 watts. To save the latter, you need a more powerful radiator than a heating one.
One of the options for improving heat dissipation is to use a flashlight at the same time for space heating. To do this, pipes can be connected to the radiator, and radiators can also be connected to them. Then they fill everything with water and “drive” it through the system with a pump.
The lantern shines far not even equipped with additional reflective elements. In the cold, it loses power, but only slightly.
Tests have shown that this craft can be used to illuminate streets, squares of settlements. It better illuminates areas, works longer than conventional lamps and costs less than devices and circuits traditionally used for such purposes.