Project :: ECE 445 - Senior Design Laboratory

#	Title	Team Members	TA	Documents	Sponsor
51	Auto Aquarium	Caleb Chow Irfaan Attarwala Sihun Hyun	Pooja Bhagchandani	design_document1.pdf final_paper1.pdf photo2.jpeg photo1.JPG presentation1.pptx proposal1.pdf
	# Auto Aquarium Team Members: - Sihun Hyun (sihunhh2) - Caleb Chow (calebyc2) - Irfaan Attarwala (iia2) # Problem With owning a fish tank, there are many maintenance steps that need to be conducted every so often to make sure the environment is livable for the fish. For example, the pH of the tank must remain constant, along with water levels, temperature, and oxygenation. These things require human maintenance and monitoring to make sure the fish have a livable environment. In addition, feeding the fish is typically a manual process. # Solution Our solution seeks to create an autonomous all-in-one solution that can monitor things such as (pH, water levels, temperature), via sensors. Our microcontroller will be wifi connected and will have a compatible mobile app that will alert the user when any of these variables are outside the acceptable variance for the fish’s living environment. In the mobile app, the user can set the ranges of acceptable variance for each variable, make profiles, etc. In addition, we will have LEDs on the tank that change color in accordance with the variables. ## Subsystem 1: Microcontroller The microcontroller will be the processor that connects all other sensors and the wifi. ## Subsystem 2: Sensors The sensors subsystem will contain a pH sensor, temperature sensor, and conductivity sensor. These sensors will be connected to the microcontroller and provide constant data back, that gets relayed back to the mobile app and LEDs. ## Subsystem 3: Feeder The feeder will be controlled by the microcontroller. The automated feeder will be on a time based schedule set in the app. In addition, the feeder can be dispensed remotely from a button on the app. ## Subsystem 4: Wifi/mobile app The wifi module will interface with the microcontroller and send data to the mobile app (ex. Temperature of water, pH level, etc.) The mobile app will display such information. # Envision of final demo For our final demo, we will have a small scale fish tank, and be able to add different things into the tank that will reflect in the app and show the LEDs changing.

Featured Project

I spoke with a TA that approved this idea during office hours today, and they said I should submit it as a project proposal.

# Habit-Forming Toothbrush Stand

Team Members:

- Rahul Vasanth (rvasant2)

- Quinn Andrew Palanca (qpalanc2)

- John Jung-Yoon Kim (johnjk5)

# Problem

There are few habits as impactful as good dental hygiene. Brushing teeth in the morning and night can significantly improve health outcomes. Many struggle with forming and maintaining this habit. Parents might have a difficult time getting children to brush in the morning and before sleep while homeless shelter staff, rehab facility staff, and really, anyone looking to develop and track this habit may want a non-intrusive, privacy-preserving method to develop and maintain the practice of brushing their teeth in the morning. Keeping track of this information and but not storing it permanently through a mobile application is something that does not exist on the market. A small nudge is needed to keep kids, teenagers, and adults of all ages aware and mindful about their brushing habits. Additionally, many tend to zone out while brushing their teeth because they are half asleep and have no idea how long they are brushing.

# Solution

Our solution is catered toward electric toothbrushes. Unlike specific toothbrush brands that come with mobile applications, our solution applies to all electric toothbrushes, preserves privacy, and reduces screen time. We will implement a habit-forming toothbrush stand with a microcontroller, sensors, and a simple LED display that houses the electric toothbrush. A band of sensors will be wrapped around the base of the toothbrush. Lifting the toothbrush from the stand, turning it on, and starting to brush displays a timer that counts seconds up to ten minutes. This solves the problem of brushing too quickly or losing track of time and brushing for too long. Additionally, the display will provide a scorecard for brushing, with 14 values coming from (morning, night) x (6daysago, 5daysago, . . . , today) for a "record" of one week and 14 possible instances of brushing. This will augment the user's awareness of any new trends, and potentially help parents, their children, and other use cases outlined above. We specifically store just one week of data as the goal is habit formation and not permanent storage of potentially sensitive health information in the cloud.

# Solution Components

## Subsystem 1 - Sensor Band

The sensor band will contain a Bluetooth/Wireless Accelerometer and Gyroscope, or Accelerometer, IR sensor (to determine height lifted above sink), Bluetooth/Wireless connection to the microcontroller. This will allow us to determine if the electric toothbrush has been turned on. We will experiment with the overall angle, but knowing whether the toothbrush is parallel to the ground, or is lifted at a certain height above the sink will provide additional validation. These outputs need to be communicated wirelessly to the habit-forming toothbrush stand.

Possibilities: https://www.amazon.com/Accelerometer-Acceleration-Gyroscope-Electronic-Magnetometer/dp/B07GBRTB5K/ref=sr_1_12?keywords=wireless+accelerometer&qid=1643675559&sr=8-12 and individual sensors which we are exploring on Digikey and PCB Piezotronics as well.

## Subsystem 2 - Toothbrush Base/Stand and Display

The toothbrush stand will have a pressure sensor to determine when the toothbrush is lifted from the stand (alternatively, we may also add on an IR sensor), a microcontroller with Bluetooth capability, and a control unit to process sensor outputs as well as an LED display which will be set based on the current state. Additionally, the stand will need an internal clock to distinguish between morning and evening and mark states accordingly. The majority of sensors are powered by 3.3V - 5V. If we use a battery, we may include an additional button to power on the display (or just have it turn on when the pressure sensor / IR sensor output confirms the toothbrush has been lifted, or have the device plug into an outlet.

# Criterion For Success

1. When the user lifts the toothbrush from the stan and it begins to vibrate (signaling the toothbrush is on), the brushing timer begins and is displayed.

2. After at least two minutes have passed and the toothbrush is set back on the stand, the display correctly marks the current day and period (morning or evening).

3. Track record over current and previous days and the overall weekly record is accurately maintained. At the start of a new day, the record is shifted appropriately.

Project Videos

Habit Forming Toothbrush Stand