stresslet

This was a project I worked on with my friends for the STEAM Tank project in May. We made it to the finals and won a couple of awards for our design! 

Our CADDed design^^^ the circuit would live inside the large "mother" bead in the middle. 

I designed our circuitry prototype--from our schematic to the basic breadboard version.

It's a bracelet that reacts to stress-- the first of its kind because bracelets like these either only focus on reacting OR monitoring to stress but we do both! Furthermore, we made it stylish and added many personalized response mechanisms so that it can be used effectively in every day life. 

1) Schematic

The circuit has a few different parts: There's a microprocessor that controls which "response" mechanism is getting voltage depending on the stress levels recorded and sent to it by the Pulse Sensor-- a premade monitoring Heart Beat monitoring part found online. The response mechanisms would be an LED that would tell the user to open up the aroma therapy stick mechanism, a haptic actuator that would vibrate over your pulse to calm you down, and a thermoelectric cooling plate that would cool the bracelet down to calm you down.

2) It would look like this inside the bracelet:

3) And finally: our breadboard version:

The code took a little bit of work and so did getting the pulse sensor to work (it kept throwing some kind of BAUD error) but this was a very cool project overall!! 

Things I'd like to improve: 

*Maybe put this into a PCB and make it more miniature

*3D print our CAD design for the bracelet and actually see it work altogether 

*Maybe add an OLED to the side of the bracelet to show you your active HRV (the measurement we take to determine your stress level) and maybe give you like little encouraging slogans like "Keep calm and study on!" 

*Use machine learning??? to make our HRV readings more accurate : )