Hello! Today's homemade mostly devoted to newcomers to the world of physics and electronics. Today I will show the simplest way to make an "eternal flashlight" namely a Faraday generator. It is “eternal” because it can work without any sources of energy, such as batteries and accumulators.
And so for him we need:
- copper wire with a cross section of 0.1-0.5 mm
-Neodymium magnets
- pvc pipe 10-15 cm long and 2 cm wide
-cardboard
low voltage LED
10000pF capacitor optional
From the tools we need:
soldering iron
glue gun
-scissors
And so the first thing to do is to cut out two washers from cardboard, 4-5 mm larger in diameter than the diameter of the pipe:
Now we attach our pipe to the center, circle and cut it out as shown in the photo (we don’t throw out the circles that we cut, we will need them later):
We put our washers on the pipe as shown in the photo and glue thermo glue:
Now we take a copper wire and weave 250-360 turns (not necessarily turn to turn)
We take the circles that we left and glue one of them on the end of the pipe, while the other end is left open:
We solder the LED to the ends of the wire (the polarity does not matter here), you can also put a capacitor at 100000pF and a rectifying diode, but since I did homework for beginners, I decided to do without them.
We take 4 connected neodymium magnets and throw them into the pipe, after which we glue the round we left:
We glue the LED there, without any reflecting sides:
On the side of one of the washers we make incisions, thread the wire, and fasten it to the pipe:
That's it! The Faraday generator is ready and it remains only to test it. In order for it to work, it is necessary to make translational movements, so that the neodymium magnet begins to move up and down in the direction of the pipe, a video with tests and instructions for manufacturing is presented below, a pleasant viewing
Thank you all for your attention! I hope this homemade help novices in understanding induction and magnetism.