Project Title–  TEB (Thermoelectric Bracelet) *name still in progress

Project Team Members- Jason Sylvestre

Description of what you are going to do- I will attempt to construct a working prototype that is capable of sending tailored thermal stimuli to the wrist using pulse width modulation (PWM) and a thermoelectric cooler. To adjust the temperature, you will use two push buttons to determine the frequency of the pulses and whether the pulses are cold or warm. There will be a RGB LED bar that corresponds to the pulse frequency and the thermal stimuli being sent.
Concept Art– 

Description of what inspired this project– Earlier this year, I read an article about a project engineered by some MIT students that was capable of sending regulated pulses of cold stimuli to the wrist to induce a perceptual change in body temperature.  It would essentially be a personal air conditioner. I thought I could improve this by making the device capable of sending both warm and cool stimuli to the wrist.

Description of Materials you plan to use along with the costs for these materials- Click here for the Bill of Materials

Steps/Timeline

10/28/2014- Finish complete design (electrical, 3D model, parts list, programming block diagram)

10/30/2014- Finish PCB design

11/11/2014- Assemble physical prototype (except PCB)

11/25/2014- SMT PCB board should be soldered and functioning

12/02/2014- Complete program that has been debugged

12/15/2014- Testing, Redesign, Implementation Complete

Backup Plans / Fallback plans

The part that I see most likely to fail is my circuit board design so as an extra precaution, I  have inserted extra vias into the PCB design in case there are faults.  My fallback plan is to assemble it on perfboard using through-hole components. I will also buy extra discrete components in case those fail.

Since the presentations, I have made great progress on the PCB design, which you can see below.   I designed this using Altium software.   As you may notice, it’s a very compact design.