Heated Boots

7,793

111

57

About: Hi! I make different things :)

My girlfriend often waits for a bus during 20-30 minutes. There is -5°C...-20°C sometimes. And today I want to show you my solution.

In the video you can see the test of this boots in beautiful New Year Helsinki.

Pleasant viewing :)

Step 1: I Used:

1) Wool Insoles like this:

http://s.click.aliexpress.com/e/ccScfELQ

2) Heating Nichrome Wire. I used 0.4mm:

http://s.click.aliexpress.com/e/jL1nvwo

3) Batteries Li-ion 18650:

http://s.click.aliexpress.com/e/bnXXyPtQ

4) Power Bank Case (5V, 1A):

http://s.click.aliexpress.com/e/zRJrt9q

5) Hand made USB powered cable for 5V, 1A.

6) Sewing Elastic Rubber 40mm:

http://s.click.aliexpress.com/e/bdAQtCMu

Step 2: Nichrome Wire.

I cut 65 cm of nichrome wire. It takes 5V, 0.7A for one foot. Insoles warm up to +49°С.

Step 3: USB-cable

I tested some USB-cables, but they could transfer only 0.5A unfortunately. And I made my own.

Step 4: Soles + Wire + USB-Cable

I sewed the wire and USB-cable to insoles. Nichrome wire couldn't solder, so i used needle with thread.

Step 5: Batteries

I used new li-ion batteries 18650. I tested it's capacity = 3400mAh! It's great :)

Let's calculate battery live time.

Battery has 3.7v and 3400 mAh, but Power Bank voltage transformer gives 5V.

So battery into case should has capacity: 3.7*3400/5 = 2516 mAh.

The nichrome wire "eat" 0.7A, so battery live time: 2516/700 = 3,6 hours. Voltage transformer efficiency, I think, 90%, so we have 3,6*0,9 = 3,24 hours.

It's about 3:15.

Will check it latter.

Step 6: Temperature Test

I got 21°C (without nichrome wire) and 49°C (with). Cool!

Step 7: Put Inside

Step 8: Strap

I sewed straps using 40mm rubber and velcro.

Step 9: Results

Hid under jeans :)

Step 10: Conclusion

We tested heated boots in Helsinki on the New Year holiday. It is a beautiful city! But it was so windy.

We were walking about 8 hours every day. And these boots were saving Masha.

Masha is happy. Me too :)

Live test showed they are great boots, don't causes discomfort. Live time about 2-3 hours. We didn't check the exact time.
But USB contact was bad. I want to change it to other connector type.

PS: Sorry for my bad English, I am still learning. You can correct me (please).

PSS: It's my first instruction, so I will be happy to read your opinions ;)

Share

    Recommendations

    • Faux-Real Contest

      Faux-Real Contest
    • Warm and Fuzzy Contest

      Warm and Fuzzy Contest
    • Sweet Treats Challenge

      Sweet Treats Challenge

    57 Discussions

    0
    None
    MillerI

    1 day ago

    I really like your 'Ible. It reminds me of times when I lived in a region that required such drastic measures (American Mid West).

    Try using a USB-C cable. They are spec'd and designed to handle the higher loads. Just got a new Chromebook and it wouldn't mobile charge rapidly on regular USB adapters. Got the USB-C adapter and cable and now getting 2.2A charge!

    Cheers!

    2 replies
    0
    None
    KillmyfeelMillerI

    Reply 1 day ago

    Thank you!
    But I don't need more then 0.7...1.0A :)

    0
    None
    MillerIKillmyfeel

    Reply 1 day ago

    Last I checked, 2.0A is a bit more than 0.7 or 1.0. :-)

    0
    None
    jackreno11

    3 days ago

    Very interesting project! Well done!

    It's cool to see some other creators using AliExpress, I feel like it's really overlooked for the kind of deals it has. Especially using the power banks. I've got a few projects in the works using the same parts!

    1 reply
    0
    None
    smokebox

    10 days ago

    Interesting idea to use nichrome wire as a heating element! There was an emphasis on learning a second language in American high school in the 1960's, but it is apparent that
    Americans have become even more insular since then. It is now mostly American women who graduate from American colleges. I am glad that Finns are still interested in other languages!

    3 replies
    0
    None
    Killmyfeelsmokebox

    Reply 7 days ago

    Thanks for comment!
    It's interesting to know somethings about Americans :)
    But I'm not from Finland, I'm from Russian (Saint Petersburg). We celebrated New Year in Helsinki.
    And nichrome wire is standard element in many heating things.

    0
    None
    smokeboxKillmyfeel

    Reply 6 days ago

    I should say that I am glad that Russians (and Finns) are still interested in other languages. This is the first time I have seen fine nichrome wire woven into clothing as a DIY project:) I usually think of nichrome as something difficult to work with, and carbon heating elements seem most popular for this kind of application..

    0
    None
    Killmyfeelsmokebox

    Reply 1 day ago

    Yes, carbon heating elements better for clothes

    0
    None
    wclapieandb41

    Reply 7 days ago

    I wonder if nichrome wire could be soldered with silver solder?

    0
    None
    tem494

    7 days ago on Introduction

    Nice job just wish I had this when I lived in the colder part of the country it would have saved my very cold feet.
    Don’t worry about the English there are people that live in the US that do as well as you do keep up the good work.

    1 reply
    0
    None
    RobnAus

    7 days ago

    I loved the video and your beautiful country but I especially loved your video editing where it appears you grabbed the batteries off of your laptop's LCD screen. That was brilliant! Thank you for sharing your project.

    2 replies
    0
    None
    millervetRobnAus

    Reply 7 days ago

    RobnAus - You beat me to it! -- I think we need an Instructable on how to grab things off the Internet : )

    0
    None
    Mark French

    Question 7 days ago

    How does it stand up to water. That is if the boots get wet, will it short the warmer out? If you think your English is bad, you should see some of the things people here in America write.