Project

# Title Team Members TA Documents Sponsor
67 Toothbrush Alarm
 Carl Xu
Eric Lin
Laurenz Nava
 Zicheng Ma design_document2.pdf
final_paper1.pdf
photo1.png
photo2.png
photo3.png
photo4.png
presentation1.pdf
proposal2.pdf
video1.mp4
video
# Toothbrush Alarm

Team Members:
- Eric Lin (yulin4)
- Carl Xu (zx32)
- Laurenz Nava (lfnava2)

# Problem

Waking up early in the morning is a challenge that many people face, and conventional alarms often fail to provide an effective solution. Despite setting multiple alarms, people find themselves consistently oversleeping, waking up significantly later than intended. This issue can lead to a range of negative consequences, including disrupted daily schedules, reduced productivity, and increased stress. Traditional alarms tend to lack the ability to ensure that a person not only wakes up but also gets out of bed and starts their day. This is particularly problematic for those with a heavy sleeping pattern or a habit of snoozing alarms.

# Solution

To address this issue, our idea is to create a Toothbrush Alarm. The concept involves an alarm that persists until you get up and spend, for example, 3 minutes brushing your teeth. Once the toothbrushing routine is complete, the alarm automatically stops. This not only ensures a timely wake-up but also promotes a refreshed start to the day after engaging in the morning teeth-cleaning ritual.

# Solution Components

## Subsystem 1 – Toothbrush Dock

The dock will sense the proximity of the toothbrush, and how long the user’s been brushing their teeth. Once the user picks the toothbrush up and puts it down after more than 3 minutes, it will tell the alarm to turn off.

The dock will contain our PCB board to control the whole system.
Multiple pressure sensors are contained in a shape that perfectly matches the bottom of the toothbrush to detect if the toothbrush is docked.

The sensors will be at the bottom and side to ensure the object docked is the toothbrush, and the user is not fooling the dock with another object.

DF9-16 pressure sensor: https://a.co/d/5HXVw5w



## Subsystem 2 – Miniature Accelerometer

To ensure the user brushes their teeth after picking up the toothbrush, the accelerometer will be used to detect whether the user is making appropriate teeth brushing movements. While it is possible to simply wave the toothbrush without actually brushing your teeth, the main purpose of the device is to wake up the user, and sufficient physical movement will help, regardless of if it is used to brush teeth or not.

The accelerometer will determine the force applied on the brush and how often it switches directions, so it can tell when the user is brushing their teeth

ADXL326BCPZ-RL7: https://www.digikey.com/en/products/detail/analog-devices-inc/ADXL326BCPZ-RL7/2043340


## Subsystem 3 - Alarm

The alarm is connected to the toothbrush dock, and it will stop ringing once the user picks up the toothbrush. However, if the user does not put it back into the dock after 5 minutes, it will restart the ring.

The alarm will be a speaker integrated into the dock, or can be wired into the user’s room to more effectively wake them up.

COM-11089 ROHS speaker: https://www.sparkfun.com/products/11089


## Subsystem 4 – Body Motion Sensor

A possible addition to the project for added complexity. It would detect the appearance of a new individual in the bathroom to further ensure the system works intended.

The motion sensor will be installed around the dock, facing the user to detect if they have entered the bathroom and continued present in the bathroom, ensuring they are not fooling the system.

HC-SR312 AM312 pir motion detector senses passive body infrared to make sure the moving object is a human.

HC-SR312 AM312 pir motion detector: https://a.co/d/3Jodam9


# Criterion For Success

1. Alarm will turn off after the user brushed their teeth for 3 minutes.

2. Toothbrush can detect if it is inside a human’s mouth.

3. Dock can detect if the toothbrush is present in the dock.

4. Dock can track how long the toothbrush is not present.

Recovery-Monitoring Knee Brace

Dong Hyun Lee, Jong Yoon Lee, Dennis Ryu

Featured Project

Problem:

Thanks to modern technology, it is easy to encounter a wide variety of wearable fitness devices such as Fitbit and Apple Watch in the market. Such devices are designed for average consumers who wish to track their lifestyle by counting steps or measuring heartbeats. However, it is rare to find a product for the actual patients who require both the real-time monitoring of a wearable device and the hard protection of a brace.

Personally, one of our teammates ruptured his front knee ACL and received reconstruction surgery a few years ago. After ACL surgery, it is common to wear a knee brace for about two to three months for protection from outside impacts, fast recovery, and restriction of movement. For a patient who is situated in rehabilitation after surgery, knee protection is an imperative recovery stage, but is often overlooked. One cannot deny that such a brace is also cumbersome to put on in the first place.

--------

Solution:

Our group aims to make a wearable device for people who require a knee brace by adding a health monitoring system onto an existing knee brace. The fundamental purpose is to protect the knee, but by adding a monitoring system we want to provide data and a platform for both doctor and patients so they can easily check the current status/progress of the injury.

---------

Audience:

1) Average person with leg problems

2) Athletes with leg injuries

3) Elderly people with discomforts

-----------

Equipment:

Temperature sensors : perhaps in the form of electrodes, they will be used to measure the temperature of the swelling of the knee, which will indicate if recovery is going smoothly.

Pressure sensors : they will be calibrated such that a certain threshold of force must be applied by the brace to the leg. A snug fit is required for the brace to fulfill its job.

EMG circuit : we plan on constructing an EMG circuit based on op-amps, resistors, and capacitors. This will be the circuit that is intended for doctors, as it will detect muscle movement.

Development board: our main board will transmit the data from each of the sensors to a mobile interface via. Bluetooth. The user will be notified when the pressure sensors are not tight enough. For our purposes, the battery on the development will suffice, and we will not need additional dry cells.

The data will be transmitted to a mobile system, where it would also remind the user to wear the brace if taken off. To make sure the brace has a secure enough fit, pressure sensors will be calibrated to determine accordingly. We want to emphasize the hardware circuits that will be supplemented onto the leg brace.

We want to emphasize on the hardware circuit portion this brace contains. We have tested the temperature and pressure resistors on a breadboard by soldering them to resistors, and confirmed they work as intended by checking with a multimeter.

Project Videos