Yingtong Hu - yh15 - ECE110

Yuheng Chang - yuhengc2 - ECE110

• Project Final Report:

          

  
      

• Project Code:

     Self-Heat-Pocket.ino
  
  

  
  

• Introduction

      During the cold winter day, you hands will definitely be the coldest thing of your body, When you put your hand in your pockets and it's warm. God! That's heaven. This project is aiming to create this heaven.

  
  

  1. Statement of Purpose

     Build a self heat pocket to keep hands on the desire temperature with indicators(when start heating and when the temperature is desired) and with several opinions(different desire temperature based on "I want to heat up real quick" or "just keep it warm").

  2. Background Research
     
     We can use Arduino with thermal sensor with the heat pad to build the main heating part. We need We also want to building the gates that decide when to start and when to stop (ie. re-heat after temperature drop around 6 degree to avoid constant heat-stop-reheat cycle). We also research around what is the best way to deal with the gap between heat and reheat to achieve desire result and save energy.

• Design Detail 
  
  
1. Block Diagram / Flow Chart
   
   
   The input from the users are controlled by buttons.
   
   
• Parts
  
  • Arduino UNO R-3 Board
  • Thermal Sensor
  • Lillypad Arduino
  • Two 9v batteries 
  • Heating pad 
  • Thermo-resistor (TMP36) 
  • Variable voltage regulator  
  • Transistor
  • Solder 
  
  
• Possible Challenges
  There are several challenges:
        1)  The heat pad require 9V but the Lillypad require 5V. Thus, a carefully designed MOSFET is required.
        2)  Designing and assembling the option gates ("heat up" or "keep warm")
        3)  Heating always require significant amount of power. Finding portable and reliable sources is important.
        4)  Design the circuit to heat up and reheat base on the current temperature and temperature gap is a challenge.
        5)  Learning and manage Arduino Lillypad is a challenge.
  
  

• References

           Akram Shibly. Mar 12, 2014. Retrieve from https://www.youtube.com/watch?v=HBGUXOlEye8

           Alan Zucconi. Aug 2, 2016. Retrieve from  https://www.alanzucconi.com/2016/08/02/arduino-heater-2/