Hot Hands

Team Members

Melissa Roberts 3161139

Samantha Sylvester 3165592

Project Description

We created a pair of gloves that warm up when you make a fist, press your hands together, or hold somebody’s hand. The main components are conductive pressure sensing fabric, conducting warming fabric, hand-sewn fleece lining, and a store-bought outer layer. The Eeontex Pressure Sensing Fabric is our sensor, which triggers a current to run through the Thermionyx Non-Woven Warming Fabric.

Code

https://github.com/SuckerPunchQueen/nano_attempt_1

Process

Research, Materials, & Planning

glove_design2

 

circuit2_labelled

Schematic: Instructables

Resources:

Making Gloves – Instructables

Example of Insulation – Adafruit

Temperatures – Embedded Artistry, Electronics Cooling

Circuits for Heating Pads – Instructables, SparkFun

Using a Relay – Circuit Basics

Material Creation

img_20181112_005749

screenshot-6

Conductive fabric on either side of pressure sensing fabric → pressure sensor

Kapton tape wrapped around heating fabric → insulation

Kapton tape, waterproof seal, ziploc bag → protective pouch to hold circuit

Technical Creation

screenshot-7

Challenge: Soldering short-circuited the Arduino nano

Our pressure sensor output was between 0 and 3 after soldering, vs. between 100 and 1000 before soldering

Solution: Solder the wires together to bypass the breadboard

screenshot-8

Soldering instead of using a breadboard meant we had less to stuff inside the glove

Challenge: visualizing the schematic & figuring out what needs to be soldered together

Solution: colour-coding & lots of drawing

screenshot-11

Batteries we tried: A23, 8x AA, 9V, 10x 3V coin cells, lithium ion 3.7V, 2 different power banks, 2 different ac wall adapters

Challenge: How many volts do we need? How many mAh? And watts? How much resistance does our fabric have? What is electricity?

Solution: TBD

Finalize

screenshot-12

img_20181115_061956

Duplicate the circuit

Combine fleece lining, circuit baggy, and outer glove

Stitch it all together

Future Improvements

→ LED indicators (on/off, temp. scale)

→ Temp. feedback from the heating fabric

→ Battery powered

→ Heating for the whole hand (fingers incl.)

→ Haptics: touch a sensor on the wearer’s hand to send a little buzz (why not?)

→ Aesthetics (gloves now look like Mickey Mouse Hands)

Project Context

Our project has significant differences from other DIY heated gloves. An important difference between our project and the Arduino Powered Heated Glove Liners is the material used to heat the glove. While we used Thermionyx Warming Fabric from Eeonyx, this project used copper wire. While copper wire is conductive, wires are less comfortable and more dangerous, considering they will be right against the skin. Electric blankets are another common product that involve heating a material to be placed against the body, and those often have specified shut-off times and warnings due to the wiring and electrical danger. Using a conductive heating fabric is a safer option, though more difficult to power. Adafruit’s How to Make Tech Gloves that Keep You Warm used LilyPad instead of Arduino, due to its size and ability to incorporate into wearables. We had considered using LilyPad when researching smaller microcontrollers, but due to our familiarity with Arduino, and comparative lack of familiarity with other microcontrollers, we decided to go with the Arduino Nano over the LilyPad. Other than that, they also used conductive thread rather than wires to create a circuit, which is something we were advised to consider during the critique on Thursday. In future, we plan to follow that advice, as it will give our circuit more flexibility and durability. The project DIY Carbon Tape Heated Gloves, the main difference is the same as the Arduino Powered Heated Glove Liners, namely, the use of wire in such close proximity to the skin. Also, the carbon tape doesn’t allow for the same even heating across a larger surface area the way the Thermionyx material does. It would be interesting to see how we could combine the two materials, as carbon tape may be more suitable for heating smaller surfaces such as fingers. Perhaps with the use of conductive thread, the danger of wires could be avoided as well.

Leave a Reply