What kind of human energy is not used to convert it into electricity. That got to heat. I will show you how to make an eternal electric LED flashlight that uses the heat of our body. One of the Western companies produces similar key chains, using the heat of your finger. One LED shines there. I decided to increase the size of the flashlight, making a full-fledged eternal flashlight.
It will be enough electricity to brightly illuminate the LED panel from the old battery lantern. What do you need to make this eternal lantern? I told about the work of the element in the last article - free energy in your home, we will not stop at this.
The scheme is this - all 4 Peltier elements are connected in series: plus to minus,and then this circuit connects to the boost converter.
We take out a large radiator and check the performance of the circuit. The radiator cools the elements from the bottom, and I heat them with a hand from the top. At the output of the elements there is a voltage of about half a volt. This is enough to run a boost converter. The LED connected to the output of the converter glows brightly - testifying to its work.
Making a lamp on the Peltier elements
Now we will bring everything to life. Take an aluminum sheet and cut off the strip. The thicker the aluminum, the better. 1-3 millimeters will be enough. We cut out blanks such as blades. In the center there will be Peltier elements, and the wide ends will serve as radiators. We bend the workpieces so that we can make a spaceship from fantastic space films. There must be a space between them. In the center will pass the wires. Plastic lining completely hide the radiator inside the handle, do not allow to transfer the heat of the hands to the radiator.Thus, we touch only thermoelements. We twist the plates, set the elements, press them with plastic plates, let the wires through. We fasten the transducer on one of the plates. We will make small ears for fastening the flashlight. For this you can use a thinner aluminum. We connect and solder everything.
The best time to work this flashlight is of course winter.When on the street zero or minus hands are still not very cold, and using such a flashlight is quite real. For a better effect, you can periodically change hands. Try to do something similar yourself. This is not so difficult and expensive, as spectacular and exciting.