Project

# Title Team Members TA Documents Sponsor
29 Automated Tea Maker
Kyle Humphries
Milan Patel
Tanmay Mittal
Chi Zhang design_document1.pdf
proposal1.pdf
proposal2.pdf
# Automatic Tea Maker

## Team Members:
-Tanmay Mittal (tmitta3)
-Kyle Humphries (kylebh2)
-Milan Patel (milanhp2)

## Problem
Preparing tea can be a tedious process that requires knowing how to balance the right amount of tea leaves and monitoring steeping times. Measuring specific amounts of leaves requires tea drinkers to pack ingredients into a mesh/metal infuser. They have to wait, depending on how strong they want the final drink to be, which can be an additional inconvenience. New drinkers can have a hard time knowing what types of tea to mix and knowing how long to steep them for. The current process for preparing tea from loose leaves is very hands-on but can be automated.

## Solution
Our proposed solution is to introduce a device that is capable of storing a variety of dry leaves and dispensing them depending on the drink the user wishes to make. This blend would be loaded into some sort of mesh chamber that lies above a space where a hot cup/mug of liquid will be placed. A motorized subsystem would then lower the mesh chamber into the cup and steep the blend for some amount of time. Once complete, it would raise back up, allowing the user to take their cup. Finally, it would dispose of the wet tea leaves by dropping them into a waste compartment. Our microcontroller will be responsible for controlling motors and measuring out specific amounts of leaves as well as dispensing them into the mesh chamber. An application component would allow users to select blends, control steep times, and get notified when the drink was prepared.

# Solution Components

# Steeping Subsystem

The purpose of this subsystem is to steep the tea leaves in the water for a specified amount of time so that we can make tea in various strengths and flavors. The subsystem will steep a measured amount of tea leaves to ensure consistent flavor across multiple uses. We want to have a retractable system that can lower into a cup of water and retract after about 2-3 minutes depending on the strength of the tea desired. Load up the spoon with the specified amount of tea leaves automatically as well as discard the tea leaves after use. Also, have a motor to press a lever to compress the tea and leaves in the spoon when they are in the water to prepare the tea
## Storage and Dispensing Subsystem

This subsystem will need to store the dry tea leaves in separate compartments and leverage weight sensors to dispense specific amounts. The backside of this component can be clear to allow users to see when specific ingredients are running low or spoiling. The dispensing requires a valve that will open/close depending on what step of the process we are in.

## Sensors

We will require a weight measuring sensor to measure the weight of the specified type of tea to be able to accurately ensure tea strength across multiple uses. We will also require a timer sensor that can keep track of the time the steeping spoon has been steeping in the water to ensure consistent batches.

## Control and Communication

The microcontroller will be responsible for controlling multiple aspects of this device. We will use the ESP32-S3-WROOM for its wi-fi/Bluetooth capabilities. This will communicate with the sensors that will help measure specific amounts of leaves. The motors that control the valves that dispense the blend of dry leaves will need to be controlled by the MCU as well. Finally, the subsystem responsible for steeping the recipe will have motors involved as well as a timing component. The microcontroller will need to be able to process data from the sensors and relay the correct commands to different subsystems. The application component will need to be to communicate with it as well.

## Mobile Application

This subsystem will be responsible for providing users with a friendly interface. Through a lightweight application, users can have access to preset blends that they can select. They can also create their own. Steeping times can be selected as well. Once a user wishes to dispense and steep a recipe, they can use the application to communicate wirelessly with the microcontroller to begin the process. Once the process is complete, we can notify users through the app. Additional features we could add include a live countdown of how long is left until their drink is ready and saving specific blends.

## Power

Provide power for all the motors and sensors for at least 10 minutes so the tea process can be set up, made, and reset. A 12V battery would be used to supply the power due to all the motors being smaller. The battery will be either rechargeable or have a compartment for the battery to be easily switched out. To fix the inconsistent power of batteries we would add a voltage regulator circuit.

# Criterion For Success:

-Fully Automated Steeping Process: A working system to lower the ingredients into the water and remove them once the tea is at the desired strength.
-Measuring: An accurate way to control/measure the ingredients being put into the steeping system. Be able to take the user set input of the amount of ingredients and correctly disperse the set amount
-An interactive interface: The consumer can input the amount, time duration, and emergency stop/hold. All information should be clearly displayed and easy to use. Notification to show that the process is done or any errors that have occurred.
-Longevity: The overall system should be able to handle high temperatures since they will be operating around a cup of boiling water. The device should be able to handle water due to working near it and for cleaning purposes.

Habit-Forming Toothbrush Stand

John Kim, Quinn Palanca, Rahul Vasanth

Habit-Forming Toothbrush Stand

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.

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