Project

# Title Team Members TA Documents Sponsor
35 Bluetooth Enabled Gloves for Controlling Music
 Mehul Aggarwal
Oliver Johnson
Saicharan Bandikallu
 Akshatkumar Sanatbhai Sanghvi design_document1.pdf
final_paper1.pdf
other1.pdf
photo1.jpg
photo2.jpg
presentation1.pdf
proposal1.pdf
proposal2.pdf
video1.mp4
Bluetooth Enabled Gloves for Controlling Music

Team Members:
- Saicharan Bandikallu (sb35)
- Mehul Aggarwal (mehula3)
- Oliver Johnson (owj2)


# Problem

Inclement weather can inhibit the users ability to provide input to their phone. When people wear gloves, oftentimes they are too bulky to skip a sound track directly on wireless headphones, and would have to resort to taking out their phone which is rather cumbersome, and lots of times the feedback from the gloves is inconsistent. Since many people already wear gloves during the winter our solution is to use the gloves directly as input.

# Solution

We will create a system of technological gloves that can be used to fix this problem. The gloves will be able to connect via bluetooth to your phone and allow you to control your music settings and accept/reject calls. This will be possible through the use of flex sensors which will translate certain glove movements into command actions for your phone, such as skipping a song or accepting a call. This system will be useful because it allows you to control these phone functions without having to take off your gloves in cold weather and press a button on your earphones or pull out your phone.

# Solution Components

## Subsystem 1
Using the flex sensors in a glove and creating a training model to detect finger/hand movements. We can then program certain finger/hand movements to control certain actions on your phone. The actions we want to focus on are accepting/declining calls, next track, previous track, volume up, and volume down.

Main parts required: ZD10-100 Flex Sensor

## Subsystem 2
One glove will have a bluetooth device which allows it to connect to your phone. The glove will contain flex sensors and be pre-programmed with the movements required to perform certain actions on your phone. A microcontroller will read the flex sensor inputs from hand movements and determine which actions need to be sent to the phone for execution. We will also have to look into how to send specific bluetooth signals which an iphone can interpret.

Main parts required: ESP32 WROOM microcontroller, MDBT42Q-512KV2 bluetooth transmitter


## Subsystem 3
We will also include a haptic feedback system into the glove to indicate when a hand movement has been registered and a command is being sent to your phone. This will require the use of vibration motors.

Main parts required: DC 3V 12000rpm Flat Coin Button-Type Micro Vibrating Motor


# Criterion For Success

The goal is to be able to use a pair of gloves to control the music being played by a phone. The gloves should allow users to control volume, pause/play the music, skip or go back to songs, and accept or decline calls.

Phone Audio FM Transmitter

Madigan Carroll, Dan Piper, James Wozniak

Phone Audio FM Transmitter

Featured Project

# Phone Audio FM Transmitter

Team Members:

James Wozniak (jamesaw)

Madigan Carroll (mac18)

Dan Piper (depiper2)

# Problem

In cars with older stereo systems, there are no easy ways to play music from your phone as the car lacks Bluetooth or other audio connections. There exist small FM transmitters that circumvent this problem by broadcasting the phone audio on some given FM wavelength. The main issue with these is that they must be manually tuned to find an open wavelength, a process not easily or safely done while driving.

# Solution

Our solution is to build upon these preexisting devices, but add the functionality of automatically switching the transmitter’s frequency, creating a safer and more enjoyable experience. For this to work, several components are needed: a Bluetooth connection to send audio signals from the phone to the device, an FM receiver and processing unit to find the best wavelength to transmit on, and an FM transmitter to send the audio signals to be received by the car stereo.

# Solution Components

## Subsystem 1 - Bluetooth Interface

This system connects the user’s phone, or other bluetooth device to our project. It should be a standalone module that handles all the bluetooth functions, and outputs an audio signal that will be modulated and transmitted by the FM Transmitter. Note: this subsystem may be included in the microcontroller.

## Subsystem 2 - FM Transmitter

This module will transmit the audio signal output by our bluetooth module. It will modulate the signal to FM frequency chosen by the control system. Therefore, the transmitting frequency must be able to be tuned electronically.

## Subsystem 3 - FM Receiver

This module will receive an FM signal. It must be able to be adjusted electronically (not with a mechanical potentiometer) with a signal from the control system. It does not need to fully demodulate the signal, as we only need to measure the power in the signal. Note: if may choose to have a single transceiver, in which case the receiver subsystem and the transmitter subsystem will be combined into a single subsystem.

## Subsystem 4 - Control System

The control system will consist of a microcontroller and surrounding circuitry, capable of reading the power output of the FM receiver, and outputting a signal to adjust the receiving frequency, in order to scan the FM band. We will write and upload a program to determine the most suitable frequency. It will then output a signal to the FM transmitter to adjust the transmitting frequency to the band determined above. We are planning on using the ESP32-S3-WROOM-1 microcontroller given its built-in Bluetooth module and low power usage.

## Subsystem 5 - Power

Our device is designed to be used in a car, so It must be able to be powered by a standard automobile auxiliary power outlet which provides 12-13V DC and usually at least 100W. This should be more than sufficient. We plan to purchase a connector that can be plugged into this port, with leads that we can wire to our circuit.

# Criterion for Success

The device can pair with a phone via bluetooth and receive an audio signal from a phone.

The Device transmits an FM signal capable of being detected by a standard fm radio

The Device can receive FM signals and scan the FM bands.

The digital algorithm is able to compare the strength of different channels and determine the optimal channel.

The device is able to automatically switch the transmitting channel to the predetermined best channel when the user pushes a button.