- At home for lighting: you can connect it to either a computer or a laptop.
- On a hike, fishing or hunting: you can connect it to an external battery (power bank) and the lighting in a tent or outdoors is ready!
- In the car for illumination: now every radio has a USB input. If you make the wire longer, you can generally use it as a mobile inspection lamp.
- There are quite a few other uses.
What do you need for a USB lamp?
- USB cable from any unnecessary charging.
- LEDs 1-3 W power.
- A pair of 5-500 Ohm resistors - the resistance depends on the brightness of the light LEDs.
- Non-working 220 V LED light bulb.
Making a USB lamp
Let's disassemble the light bulb. To do this, you need to pry off the white dome with a flat screwdriver. It is glued and should gradually release from your pressure.
We remove the internal board, we will no longer need it, we will have our own.
We make a hole in the base for the wire with a hot soldering iron. You can simply drill it with a drill.
We pass the wire to power the light bulb.
We now need to assemble a very simple power supply circuit LEDs from USB - 5 V.
We do everything on a piece of plastic. My brightness is low, but if you want brighter, you need to do everything on an aluminum piece of metal. For better heat removal from LEDs. The resistance of the resistors can also be used to adjust the glow power LEDs, and hence their heating.
We glue our assembled board to the light bulb. Glue with hot glue.
Now let's assemble the light bulb. Glass can be glued with super glue.
Here's what the finished USB-powered lamp looks like.
Here's how to glow. Almost like the light before when it worked on 220 V. LEDs You can take something more powerful and larger in quantity. But in this case, the current consumption will also increase, which may affect the USB load. I made the best option.
