The master-master has to work a lot at night and for work you need high-quality lighting. The peculiarity of his work is that quite often there is no access to the electric network. Having decided to make a searchlight on his own, the master decided to stick to the following parameters:
-The projector should shine brighter than the battery models on the market
-Battery life should be at least two hours
- The battery must be a standard 18 V from a power tool (in this case, Makita)
-The spotlight must have additional sockets for additional power. equipment
-The cost should be within 60 pounds (about 5 thousand rubles)
Tools and materials:
- 50 W LED outdoor floodlight;
-Switch;
-Fuse;
- Aluminum box 188 x 120 x 57 with class IP54;
-Electric socket;
- Oil seals 20 mm;
-Profile;
-Drill;
-Ushm;
-Fasteners;
-3D printer;
-Soldering accessories;
-Screwdriver;
-Welding machine;
Step One: Adapter
To use a battery from a power tool, you need an adapter. The master printed the case on a 3D printer (available on), and purchased the connector itself.
Step Two: Inverter
To supply a 220 V searchlight, the master purchased a car inverter. I disassembled it, took out the board and cut the wire going to the car plug (not at the root).
Step Three: Buck Converter
The inverter works from the vehicle’s on-board network of 12 V. The Makita battery is 18 V at the output of the battery. Therefore, the master installs a step-down converter in the circuit with the following parameters: 24-12 V 5A 60 W.
Step Four: Build
Now proceeds to assembly. Marks and cuts out openings for switches, sockets, fuses in the housing. Fastens them.
Secures the spotlight to the box. Starts a wire from it inside the box.
Installs the inverter board inside the box, connects.
Step Five: Stand
The master made a stand out of a profile pipe. Cut to size. Cooked. I screwed the spotlight to the stand.
All is ready.
Examples of the searchlight.
Without lighting.
With the spotlight on.
The master is pleased with his work. The basic requirements set during the design are fulfilled. The searchlight shines brighter than similar industrial models, compatibility with standard batteries, battery life of at least 2.5 hours, additional connectors are installed. Only the master slightly exceeded the budget and the searchlight cost him £ 70 (about 6 thousand rubles). But this happened due to a burnt inverter, which was subsequently replaced by a more powerful 15 A.
According to the master, a less powerful searchlight of 20, 30 or even 10 watts would be enough for lighting.