Project

# Title Team Members TA Documents Sponsor
50 Smart Pillow
Aniketh Aangiras
Karan Samat
Trusha Vernekar
Akshatkumar Sanatbhai Sanghvi design_document2.pdf
final_paper1.pdf
photo1.png
photo2.png
presentation1.pdf
proposal2.pdf
video1.mp4
# TITLE: Smart Pillow

# TEAM MEMBERS:
- Karan Samat (karanas2)
- Aniketh Aangiras (aniketh3)
- Trusha Vernekar (tnv2)

# PROBLEM

As technology advances, more people tend to use devices such as their phones or laptops right before going to bed. Studies have shown that sleep is affected drastically due to the use of technology in the hour before going to bed. People have reported less satisfactory sleep which causes them to be sleepier during the day. Some studies have also shown that bright screens can have an impact on alertness which can lead to users having disrupted sleep more often. Repeated dissatisfactory and disrupted sleep can lead to conditions such as sleep apnea. This is a growing concern due to the increase in the use of technology and can be dangerous.

The signs that a person is not having satisfactory sleep can be loud snoring and frequent changes in sleeping positions. One way that can improve sleep is by listening to relaxing music or some peaceful podcasts. However, you cannot be sure when you would be having disrupted sleep. Smartwatches do a good job of detecting your sleep cycle but they must be charged very often and they are not able to help you improve your sleep.

# SOLUTION

To fix the above-stated problems, we propose the implementation of a smart pillow. Through this smart pillow, we aim to not just track sleeping habits, but also improve them. We will track the sleeping habits of the user through the following sensors: touch sensor, audio sensor, and pressure sensor. In addition to these sensors, we will also use a Bluetooth speaker that can play white noise or any other sounds/music that the user feels comfortable with to aid sleep.

The audio sensor will be used to detect snoring. The touch sensor will be used together with the pressure sensor to determine the various sleeping positions of the user. This will then help us determine the quality of sleep of the user at each sleeping position.

We believe that our idea stands out from what is already available today through the usage of the Bluetooth speaker system and the fact that this is more cost-effective. Most devices that are currently available include mattresses and smartwatches. However, these are significantly more expensive and do not provide a speaker system.

We will be using a power system to regulate the power of each sensor subsystem. Hence we will have to use a PCB since it contains all the logic related to the sensors and the power modules.


# SOLUTION COMPONENTS
## SUBSYSTEM 1 : THIN FILM PRESSURE SENSOR SUBSYSTEM

This subsystem will help detect if a person is moving in their sleep. Many pressure sensors will be uniformly scattered across the pillow to detect minute changes in motion which will be reinforced by the touch sensors.
Components: Pressure Sensor
## SUBSYSTEM 2 : TOUCH SENSOR SUBSYSTEM

This subsystem will help detect if a person is moving in their sleep. Many touch sensors will be uniformly scattered across the pillow to detect minute changes in motion reinforced by the pressure sensors.
Components: Touch sensor
## SUBSYSTEM 3 : AUDIO SENSOR SUBSYSTEM

This subsystem will help detect snoring and will have to filter out noise. It will be enabled if the speaker is switched off or will start up after the speaker plays out for 1 hour.
Components: audio sensor
## SUBSYSTEM 4 : BLUETOOTH SPEAKER SUBSYSTEM

This subsystem will connect to a phone/device and allow the user to play the music of their choice. This can be a podcast or something similar. As an isolated system, it will be expected to play the sound until stopped by the user.
Components: Stereo Bluetooth module, SMD amplifier, lithium-ion battery module, sliding switch, 3W speaker
## SUBSYSTEM 5 : POWER SUBSYSTEM

This subsystem will be responsible to supply power to the different components of the device.
Components: Lithium-ion battery module, USB charger/port, Battery controller, Boost/buck converters



# CRITERION FOR SUCCESS

- Detection Accuracy - We should be able to correctly detect the snoring sounds and change in sleep positions with a high enough accuracy.
- Battery life - We will ensure that the battery life is enough to last the night and maybe more based on the hardware component choice.
- Comfort - The pillow, after the addition of the sensors, should still be flexible and light. It should allow for good sleep.

UV Sensor and Alert System - Skin Protection

Liz Boehning, Gavin Chan, Jimmy Huh

UV Sensor and Alert System - Skin Protection

Featured Project

Team Members:

- Elizabeth Boehning (elb5)

- Gavin Chan (gavintc2)

- Jimmy Huh (yeaho2)

# Problem

Too much sun exposure can lead to sunburn and an increased risk of skin cancer. Without active and mindful monitoring, it can be difficult to tell how much sun exposure one is getting and when one needs to seek protection from the sun, such as applying sunscreen or getting into shady areas. This is even more of an issue for those with fair skin, but also can be applicable to prevent skin damage for everyone, specifically for those who spend a lot of time outside for work (construction) or leisure activities (runners, outdoor athletes).

# Solution

Our solution is to create a wristband that tracks UV exposure and alerts the user to reapply sunscreen or seek shade to prevent skin damage. By creating a device that tracks intensity and exposure to harmful UV light from the sun, the user can limit their time in the sun (especially during periods of increased UV exposure) and apply sunscreen or seek shade when necessary, without the need of manually tracking how long the user is exposed to sunlight. By doing so, the short-term risk of sunburn and long-term risk of skin cancer is decreased.

The sensors/wristbands that we have seen only provide feedback in the sense of color changing once a certain exposure limit has been reached. For our device, we would like to also input user feedback to actively alert the user repeatedly to ensure safe extended sun exposure.

# Solution Components

## Subsystem 1 - Sensor Interface

This subsystem contains the UV sensors. There are two types of UV wavelengths that are damaging to human skin and reach the surface of Earth: UV-A and UV-B. Therefore, this subsystem will contain two sensors to measure each of those wavelengths and output a voltage for the MCU subsystem to interpret as energy intensity. The following sensors will be used:

- GUVA-T21GH - https://www.digikey.com/en/products/detail/genicom-co-ltd/GUVA-T21GH/10474931

- GUVB-T21GH - https://www.digikey.com/en/products/detail/genicom-co-ltd/GUVB-T21GH/10474933

## Subsystem 2 - MCU

This subsystem will include a microcontroller for controlling the device. It will take input from the sensor interface, interpret the input as energy intensity, and track how long the sensor is exposed to UV. When applicable, the MCU will output signals to the User Interface subsystem to notify the user to take action for sun exposure and will input signals from the User Interface subsystem if the user has put on sunscreen.

## Subsystem 3 - Power

This subsystem will provide power to the system through a rechargeable, lithium-ion battery, and a switching boost converter for the rest of the system. This section will require some consultation to ensure the best choice is made for our device.

## Subsystem 4 - User Interface

This subsystem will provide feedback to the user and accept feedback from the user. Once the user has been exposed to significant UV light, this subsystem will use a vibration motor to vibrate and notify the user to put on more sunscreen or get into the shade. Once they have done so, they can press a button to notify the system that they have put on more sunscreen, which will be sent as an output to the MCU subsystem.

We are looking into using one of the following vibration motors:

- TEK002 - https://www.digikey.com/en/products/detail/sparkfun-electronics/DEV-11008/5768371

- DEV-11008 - https://www.digikey.com/en/products/detail/pimoroni-ltd/TEK002/7933302

# Criterion For Success

- Last at least 16 hours on battery power

- Accurately measures amount of time and intensity of harmful UV light

- Notifies user of sustained UV exposure (vibration motor) and resets exposure timer if more sunscreen is applied (button is pressed)