LEDs today are embedded anywhere - in toys, lighters, household appliances, and even stationery. But the most useful invention with them is of course a flashlight. Most of them are autonomous and give a powerful glow from small batteries. With it you will not get lost in the dark, and when working in a dimly lit room, this tool is simply irreplaceable. Small copies of the most different LED-flashlights can be bought in almost any store. They are inexpensive, but the quality of assembly can sometimes not be happy. How do homemade devices that can be made on the basis of the most simple parts. It is interesting, informative and has a developing effect on lovers of making.
Today we look at the next homemade product - LED flashlight, made literally from scrap parts. Their cost is not more than a few dollars, and the efficiency of the device is higher than that of many factory models.Interesting? Then do it with us.
The principle of operation of the device
This time the LED is connected to the battery only through a resistance of 3 Ohms. Since it contains a ready source of energy, it does not require a cumulative thyristor and a transistor for voltage distribution, as is the case with the eternal flashlight of Faraday. An electronic charging module is used to charge the battery. The tiny micromodule provides protection against power surges and prevents battery recharging. The device is charged from the USB connector, and there is a micro USB connector on the module itself.
From the tools you will need: a soldering iron with a flux, a glue gun, a drill, a lighter and a paint knife .
We assemble a powerful LED flashlight
Preparing an LED with lenses
Take a plastic cap with lenses , and mark up the circumference of the radiator. It is needed to cool the LED. Mark the landing grooves, holes on the aluminum plate and cut out the radiator by marking.This can be done, for example, with a drill.
We take out the magnifying lenses for a while, now they will not be needed. On the back side of the cap on the superglue glue the radiator plate. Holes, grooves in the cap and the radiator must match.
Contact us the LED and puddle the copper wiring. We protect the contacts with shrinking fluids, and heat them with a lighter. We insert an LED with wiring from the front of the cap.
Processing the body of the flashlight from a syringe
Unlocking the piston with the handle of the syringe, we don’t need them anymore. We cut the cone-blade with a painting knife. We clean completely face the syringe by making holes in it for the LED contacts of the flashlight. Fixing the lamp cap to the end surface of the syringe with any suitable glue, for example, epoxy resin or liquid nails. Do not forget to place the LED contacts inside the syringe.
Connecting the micro module for charging and battery
For lithium battery fasten terminals from the contact Ktami, and insert into the body of the syringe. We pull up the copper contacts to clamp them with the battery case.
The syringe has only a few centimeters of free space,insufficient for charging module. Therefore, it will have to be divided into two parts. We carry out the painting knife in the middle of the module board, and break it along the cutting line. Using double scotch tape, we connect both halves of the board together. "style =" max->" Solder the remaining three contacts to the module according to the wiring diagram. We connect the micro-button in the last place, checking the operation of the LED. "style =" max- width: 100%; " alt="Homemade Super Bright Mini LEDFoner"> The electronic stuffing of our device is placed in the body of the syringe so that the micro USB connector and the micro button remain on the surface. The rest of the space is insulated with hot glue. We install the LED lenses back into their place from the front of the hood.
We put the battery on charge, and after a while the LED on the charging module will let you know that our flashlight can already be used. By the way, according to the author, such a flashlight can work for about 10 hours on a single charge!