As Generalissimo Alexander Vasilievich Suvovrov told the soldiers, "Feet are warm, head is cold." Well, one could argue about the head, but you need to keep your feet warm. Feet are frozen, consider the whole body is frozen. Nowadays, with the advent of more capacious and powerful batteries, this task is somewhat simplified than even 15-20 years ago. On the market you can buy not only shoes, but also a jacket, pants and even heated gloves. The author decided to go his own way and make heated insoles do it yourself.
Tools and materials:
-Insoles;
-Batteries Li-ion 18650;
-The wire;
USB cable
-Nylon elastic tape;
-Scissors;
-Centimeter;
-Soldering iron;
-Sewing needle;
-Knife;
-Multimeter;
Step One: Wire
65 cm nichrome wire should be cut on one insole.
Step Two: Cable
The master redesigned the USB cable by placing a wire with a large cross section.
Step Three: Insoles
The author chose insoles woolen. Having inserted a nichrome wire into a needle, I sewed insoles. It is important not to let the stitches of the wire touch each other. Need to flash closer to the fingers. Then, the free ends of the USB cable are soldered to the ends of the wire and fixed.
Step Four: Batteries
To power each of the insoles, the master used lithium-ion batteries 18650 at 3400 mAh, installed in the case of "Power Bank".
The test showed that the insoles warm up to 49 ° C.
Step Five: Strap
Insoles fit into shoes and there is a problem where to put the battery?
From the elastic tape, the master sews the strap.
The battery strap is conveniently attached to the foot.
According to the author, the operating time of the insoles on one fully charged battery for each leg is about 3 hours. And it really works. Below you can watch a video on the manufacture of insoles.
I’ll add from myself that I bought insoles for myself on Ali for 300 rubles. With insoles, a Power Bank of 15,000 mAh is used (actually according to reviews about 12,000). A fully charged battery lasts for 8-10 hours of continuous use when using the 5V 2A connector. Of course, the legs do not steam, but not so cold.