Gradually, winter comes. The first snow has already fallen in some countries and cities. However, the main thing for us is that the days are shorter and the nights are longer. This means that you can stock up on flashlights to at least somehow fight the darkness on the streets. We present to your attention another useful homemade, which is most relevant in the winter, due to the fact that many of us often go home from work when it is already dark.
We suggest spending a few minutes watching a video
What do we need:
- plastic spray can;
- a cylinder from a syringe;
- copper wire insulated with varnish;
- diode bridge;
- Light-emitting diode;
- off button;
- Neodymium magnets;
- a capacitor with a capacity of 47,000 and a voltage of 16 V;
Let's start making a flashlight and start by winding a copper wire onto a cylinder from a syringe. You need to wind it as tight as possible, without leaving gaps. At the end, two ends of the copper wire should remain.
We fix the resulting winding with adhesive tape. Note that you can slightly extend the ends of the copper wire, which will allow the structure to generate more energy.
We pass to the next stage of assembly. Cut out the base of the plastic spray can.
The next step is to solder the diode bridge with a capacitor. Solder the wire coming from the minus of the bridge to the wire coming from the minus of the capacitor, and the plus to the plus.
After this, it is necessary to solder the copper wires to the two remaining wires of the diode bridge.
Finally, the plus and minus contacts on the capacitor must be drawn through the switch to the LED.
Separately, we note that the LED receives energy from a capacitor, which is charged from the cylinder of the syringe. It remains to answer one question: where exactly does this energy come from? The secret is to use neodymium magnets that you need to put in the syringe and seal the cylinder bores.
After assembling the entire structure and placing it in the spray can, the flashlight will be ready for use. It works according to the following principle. In order for the capacitor to charge and be able to turn on the LED, you need to shake the flashlight well.There will be enough energy for a couple of minutes, which is enough to go through a dark alley on a winter night, because in the end, not all streets are dark and scary these days, like in horror films.
