Project

# Title Team Members TA Documents Sponsor
43 Kitchen Dry Ingredient Tracker
Anju Jain
Nynika Badam
Sanjana Kumar
Vishal Dayalan design_document1.pdf
final_paper1.pdf
photo1.jpg
photo2.heic
photo3.heic
presentation1.pdf
proposal1.pdf
video
**Kitchen Dry Ingredient Tracker**

Team Members:
- Anju Jain (anjuyj2)
- Nynika Badam (nbadam2)
- Sanjana Kumar (spkumar4)

**Problem**

In our day to day lives, it's hard to keep track of ingredients in our kitchen and make sure we replenish it often. In order to remedy this, we propose a kitchen dry ingredient tracker.

**Solution**

Our system is designed to track and communicate with users about their ingredient necessities. Each individual ingredient tracker can be tailored to different lower weight threshold measurements.
Our system will use an app to maintain a digital grocery list. If an ingredient is running low, our system will add the ingredient to a digital grocery list. We also will have the option of adding the ingredient to the user's choice of online shopping cart. Users can remove ingredients' names from the list after purchase. ​​If a user is outside and is close to a grocery store (500 m), mobile app notification will be sent to the user's phone to notify them about necessary ingredient/s.

**Solution Components**

## Subsystem 1: LED
LED lights are placed at each ingredient and will light up when a certain percentage of total ingredients are low to indicate a more urgent grocery run.
Components: LEDs (from previous semester lab kits) or LED strip (12V-NB-CW-01M), LED Driver

## Subsystem 2: Weight Sensor
Our system will have 3 weight sensors to track 3 different ingredients. This can be extended for a system with more ingredients.
Each weight sensor will have a button to indicate if that weight sensor is active.
The weight sensor will be used to make sure the dry ingredient has not gone below the minimum weight limit.
Components: weight sensor Alpha (Taiwan) MF01A-N-221-A05, button (from previous lab kits)

## Subsystem 3: Microcontroller
Our system will be powered by plugging the microcontroller to the wall.
It will keep constant track of weight fluctuations for ingredients and send the data to the app.
It will be responsible for controlling individual ingredient’s LEDs.
Components: Microcontroller

## Subsystem 4: App
We will build an Apple based mobile app to provide connectivity between the user and the system.
User specifies which weight sensor station corresponds to what ingredient and its lower weight threshold (grams).
The app will maintain a digital grocery list.
If an ingredient is running low, our system will add the ingredient to a digital grocery list.
We also will have the option of adding the ingredient to the user's choice of online shopping cart.
Users can remove ingredients' names from the list after purchase.
​​If a user is outside and is close to a grocery store (500 m), mobile app notification will be sent to the user's phone to notify them about necessary ingredient/s.

# Criterion For Success
1. System should be able to measure changes in ingredient weights
- Add/Remove ingredient from grocery list/ online store shopping cart
2. Indicate when an ingredient needs replenishing through app
- mobile app should add ingredient name to digital shopping list
- Or add ingredient to an online store shopping cart
3. When many ingredients (2 out of 3) are low, LED lights should turn on around these ingredients
4. If the user’s phone is 500 m or less from a grocery store, mobile app should send reminder to visit the store if there are ingredients in the digital grocery list (if the user chose not to go the online shopping route)

Musical Hand

Ramsey Foote, Thomas MacDonald, Michelle Zhang

Musical Hand

Featured Project

# Musical Hand

Team Members:

- Ramesey Foote (rgfoote2)

- Michelle Zhang (mz32)

- Thomas MacDonald (tcm5)

# Problem

Musical instruments come in all shapes and sizes; however, transporting instruments often involves bulky and heavy cases. Not only can transporting instruments be a hassle, but the initial purchase and maintenance of an instrument can be very expensive. We would like to solve this problem by creating an instrument that is lightweight, compact, and low maintenance.

# Solution

Our project involves a wearable system on the chest and both hands. The left hand will be used to dictate the pitches of three “strings” using relative angles between the palm and fingers. For example, from a flat horizontal hand a small dip in one finger is associated with a low frequency. A greater dip corresponds to a higher frequency pitch. The right hand will modulate the generated sound by adding effects such as vibrato through lateral motion. Finally, the brains of the project will be the central unit, a wearable, chest-mounted subsystem responsible for the audio synthesis and output.

Our solution would provide an instrument that is lightweight and easy to transport. We will be utilizing accelerometers instead of flex sensors to limit wear and tear, which would solve the issue of expensive maintenance typical of more physical synthesis methods.

# Solution Components

The overall solution has three subsystems; a right hand, left hand, and a central unit.

## Subsystem 1 - Left Hand

The left hand subsystem will use four digital accelerometers total: three on the fingers and one on the back of the hand. These sensors will be used to determine the angle between the back of the hand and each of the three fingers (ring, middle, and index) being used for synthesis. Each angle will correspond to an analog signal for pitch with a low frequency corresponding to a completely straight finger and a high frequency corresponding to a completely bent finger. To filter out AC noise, bypass capacitors and possibly resistors will be used when sending the accelerometer signals to the central unit.

## Subsystem 2 - Right Hand

The right subsystem will use one accelerometer to determine the broad movement of the hand. This information will be used to determine how much of a vibrato there is in the output sound. This system will need the accelerometer, bypass capacitors (.1uF), and possibly some resistors if they are needed for the communication scheme used (SPI or I2C).

## Subsystem 3 - Central Unit

The central subsystem utilizes data from the gloves to determine and generate the correct audio. To do this, two microcontrollers from the STM32F3 series will be used. The left and right hand subunits will be connected to the central unit through cabling. One of the microcontrollers will receive information from the sensors on both gloves and use it to calculate the correct frequencies. The other microcontroller uses these frequencies to generate the actual audio. The use of two separate microcontrollers allows for the logic to take longer, accounting for slower human response time, while meeting needs for quicker audio updates. At the output, there will be a second order multiple feedback filter. This will get rid of any switching noise while also allowing us to set a gain. This will be done using an LM358 Op amp along with the necessary resistors and capacitors to generate the filter and gain. This output will then go to an audio jack that will go to a speaker. In addition, bypass capacitors, pull up resistors, pull down resistors, and the necessary programming circuits will be implemented on this board.

# Criterion For Success

The minimum viable product will consist of two wearable gloves and a central unit that will be connected together via cords. The user will be able to adjust three separate notes that will be played simultaneously using the left hand, and will be able to apply a sound effect using the right hand. The output audio should be able to be heard audibly from a speaker.

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