Of course, this option is unlikely to be suitable as a source of main lighting. However, it also has a number of undeniable advantages:
- Bright glow;
- Long service life LED – about 50,000 hours;
- Wide lighting angle – 120°;
- Convenient metal holder that allows you to set the desired lighting angle;
- No heating of the case and protective glass;
- Minimum power consumption.
Modern LED floodlights are lightweight, unpretentious to dust, shock and even waterproof. Their metal body is reliably protected from corrosion by anodized or chrome-plated coating. They are often used to illuminate buildings, architectural monuments, and billboards. Well, in the household such a thing is simply irreplaceable, and you will see this now.
Required Parts
To make an autonomous LED lamp we will need:
- LED spotlight 12V, power 20W in an aluminum case with a movable holder;
- Lithium-ion batteries, the size is one of the most popular and popular - 18650, quantity – 24 pcs., can be collected from old laptops;
- Protective stabilizer board rated + 3S 11.1 V 25A 18650, for batteries;
- Plastic holder for battery pack;
- Adapter (charger) 12v 2A., output connector - 5.5 x 2.5mm.
Let's get started
First of all, we combine our batteries into a separate block of 12 pieces. You should have 3 rows of 4 batteries each. We set the outer rows with the anodes (+) up, the middle row with the cathodes (-) up. The batteries should fit into plastic holders, and a block like this should be organized.
Next, you need to take a metal bus and solder the anode and cathode contacts in series on both sides of the block. Resistance welding is ideal in this case, but solder and flux are also suitable for this type of work. On one side, the ends of the metal bus at the outer rows must be left a few centimeters to work with the protective board, and the rest must be cut off.
Connection diagram to the controller.
The middle row is also soldered according to the diagram shown on the protective board. Having cut the bus contacts to size, we solder the protective stabilizer board in place.
We make the second block completely by analogy with the first.
To secure the electrical part of our device, we need a case from a non-working power supply of a desktop computer. We disassemble it, completely freeing it from the filling.
We insulate our blocks with insulating tape, leaving the connection contacts exposed, and use double tape to connect them to each other, mounting them to the device body.
We mount a four-way switch into the case on the side of the power socket, and on the reverse side there are mating connectors for the adapter, connecting the outgoing ends of the protective boards and the contacts of the connectors with wires.
We connect the adapter to the connector and check the functionality of our charger. One of the contacts, for example, the anode, is connected through a switch, the second is connected directly to the spotlight.
We mark the mount of our spotlight on the power supply housing. The holes can be made with a drill and a drill bit of a suitable diameter, securing the lamp with bolts.
We check our device and assemble the body together with bolts.
So, with minimal investment and from old spare parts lying around in the pantry or on the balcony, you can assemble an excellent lamp that will help out if there is no electricity in the country house, in a country house or even in your own apartment.
