Final Project for 391AH- Electronics for Research and Prototyping

Amandeep Kaur Singh, Ibrahima Keita

Initial Objective

From our first project log:

“Wearable wrist-band that takes as input measurements of biometric markers of stress such as an elevated pulse-rate/heart rate, etc. to facilitate appropriate therapeutic intervention”

https://docs.google.com/document/d/1wDUOl5e3cJcz3zI6fTmAbI1git7_5fLGCCoQiHZeyr8/edit

Changes made to our initial objective:

• Changed our wearable from a wrist-band to a glove to get better measurements from the index finger.
• Detects users’ stress-levels based on certain biometric readings, which are scaled/mapped to defined thresholds to detect and measure users’ stress-levels. The LED strips light up accordingly and serve as visual indicators of stress/mental distress to check-in with users to remind them to take out a moment to destress and collect themselves. Additionally, there are flex sensors attached to the fingers and thumb of the glove and the glove also encourages stress-ball mechanics as a de-stressing technique.

Sensors + Materials

1. Pulse, Oximeter and Heart Rate Sensor - Pulse Oximeter : Mikroe MAX30100 - To try to measure the user’s stress levels.

   “Heart rate click carries a MAX30100 integrated pulse oximetry and heart rate sensor. It’s an optical sensor that derives its readings from emitting two wavelengths of light from two LEDs, then measuring the absorbance of pulsing blood through a photodetector. The signal is processed by a low-noise analog signal processing unit and communicated to the target MCU (Microcontroller Unit) through the mikroBUS™ I2C (Inter-Integrated Circuit) interface. A programmable INT pin is also available. Uses 3.3V power supply.” - http://download.mikroe.com/documents/add-on-boards/click/heart-rate/heart-rate-click-manual-v100.pdf

1. Arduino Nano - Microcontroller Unit (MCU)
2. Flex Sensors - To detect flexing motion for the stress-ball mechanics
   1. Allows for the lighting up of the LEDs when a flexing motion is detected

1. Glove

2. LED Strips - To visually interact with and inform the user of their stress levels based on the following format:

   Stress Lighting Up:

   Normal: Green

   Mildly/Moderately stressed: Yellow

   Stressed: Red