Project

# Title Team Members TA Documents Sponsor
28 JargonJolt
Daniel Chamoun
Luke Hartmann
Nan Kang
Angquan Yu design_document1.pdf
final_paper1.pdf
photo1.jfif
photo2.jpg
presentation1.pptx
proposal2.pdf
video
# JargonJolt

Team Members:
- Daniel Chamoun (chamoun2)
- Luke Hartmann (lukegh2)
- Nan Kang (nankang2)

# Problem

When learning a new language, amassing and retaining vocabulary is often one of the most challenging parts of the learning process and can be a choke point for advancing into conversational fluency. It is very easy for people to fall off track when learning a new language/new content, especially in the later stages which can prove detrimental to spaced repetition algorithms. According to an American 2021 study by preply.com, 71% of those surveyed who have given up on learning second languages regret letting their language skills slip. Furthermore, 43% of those people stopped studying due to either a lack of opportunity to practice, boredom, or a perceived high level of difficulty. Our project aims to assist those people to continue their endeavors to learn language.

Flashcard applications that already exist do so primarily as mobile or desktop applications. Desktop applications such as Anki have high functionality, but are not portable and could cause the user to miss days if they do not have access to their PC. Mobile applications require that the user has a smartphone, which is not ideal for certain audiences such as children or elderly. Battery life is also a concern for longer practice sessions.

# Solution

Our solution is the JargonJolt, a digital pet and portable flashcard device that makes consistently practicing your language skills convenient and fun! The JargonJolt will take advantage of the “tamagotchi effect”. Named after the popular toy by Bandai, the tamagotchi effect is the phenomenon of humans becoming emotionally attached to machines, robots, or otherwise inanimate entities. We plan to harness this aspect of human psychology to encourage people to keep up with their daily language review and practice. Nurturing/playing with a digital pet who gets happier as you do better in your flashcard reviews will keep flashcard users more engaged during their reviews as well as more consistent.

Users of the JargonJolt will be able to download Anki flashcard sets, where we will make use of spaced repetition algorithms to show users flashcards in optimal order for memory and knowledge retention. The JargonJolt will feature a low power digital ink screen for displaying both flashcards and the digital pet as well as several buttons for selecting options for responding to flashcards. Applications of similar functionality may exist as smartphone apps, but the JargonJolt has unique advantages that give it cause to exist as a product. The simplicity and toy-like nature of the JargonJolt makes it ideal for children who are not ready for a smartphone or tablet. A rechargeable battery will also allow users to take their JargonJolt on the go without worrying about the battery life of their mobile devices or the cell reception in any given area.

# Solution Components

## Subsystem 1: MCU/PCB Support/Internet Module

The ESP32 will run code to determine which flashcard to show the user, process the user’s button inputs, and change the digital ink display to show both flashcards and the status of the pet. The ESP32 will interface with the memory module to retrieve flashcard data. The MCU module will also contain serial programming pins for flashing the microcontroller. The internet module will be able to connect to the internet to download flashcard data, which will be stored in the memory module.

ESP32 (Mfr. Part #ESP32-S3-WROOM-1-N16)

## Subsystem 2: Power

The JargonJolt will feature a rechargeable battery and a Micro USB-B charging port. The battery supplies a 3v7 rail which will be regulated down to 3v3 by a linear voltage regulator. All electronics down the line (MCU, E-INK, etc.) will run on 3v3. The power module will also contain a barrel jack for tabletop testing before the battery is integrated.

3.7V 1000mAh Lithium Battery (Mfr. Part # ASR00012)

Battery Charger (Mfr. Part # ASL2112)

Linear Voltage Regulator (Mfr. Part # ADP160AUJZ-3.3-R7)

## Subsystem 3: Video

The video subsystem is used for flashcards and the digital pet display. It consists of two low power digital screens, 4.37inch, 512 × 368 resolution, communicating via SPI interface.

2 x 4.37inch E-Paper (G) raw display, 512 × 368, Red/Yellow/Black/White

## Subsystem 4: Memory

The memory module contains external SRAM which will be used to store the flashcard data, allowing the JargonJolt to operate entirely offline once flashcards are downloaded. The microcontroller will interface with the SRAM through an SPI interface.

32Mb, SerialRAM, 2.7V-3.6V (Mfr Part #: IS66WVS4M8BLL-104NLI)

## Subsystem 5: Audio

Having audio support from text on the cards also makes sense to implement. Using I2S protocols, upon showing the answer to a flashcard, audio will also play. The audio data will be stored on SDRAM.

I2S Amplifier (Mfr Part #: MAX98357 I2S)

Speaker (Mfr Part #: CMS-4017-34SP)

# Criterion For Success

Functionality:
- Syncing data between Anki for Desktop app with JargonJolt and vice versa
- Buttons for answering flashcards
- Algorithm for choosing currently displayed flashcard

Display Functionality:
- Upon receiving data from the MCU, successfully display flashcard information
- Display a digital pet based on performance metrics

USB charging capabilities:
- Reasonable battery life using low-power components

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.

Project Videos