Project

# Title Team Members TA Documents Sponsor
19 Profile Based Shower Head
 Abhi Gupta
Bhavana Ambatipudi
Manav Modi
 Akshatkumar Sanatbhai Sanghvi design_document2.pdf
final_paper1.docx
photo2.jpg
photo3.jpg
presentation1.pdf
proposal1.pdf
proposal3.docx
# Team Members:

- Abhijun Gupta (abhijun2)
- Bhavana Ambatipudi (bhavana4)
- Manav Modi (manavm2)

# Problem:

Sharing a shower with multiple individuals can often lead to conflicts and difficulties. One common issue is the inability to remember the desired position or temperature settings of the showerhead. Additionally, some individuals may have difficulty determining their preferred temperature due to the challenges of adjusting the knob. Another group who may encounter issues with the showerhead are those who are disabled or of shorter stature, as they may have difficulty reaching and adjusting the showerhead to their liking.


# Solution:

Our objective is to address some of the challenges associated with shared shower spaces by designing a showerhead that can save and recall individual user profiles. This includes information such as preferred showerhead position, water temperature settings, and average shower duration. By saving this data for each user, we aim to enhance the shower experience. For instance, by selecting a user's profile, the showerhead can automatically adjust to the last recorded position for that user. Additionally, our showerhead design would allow users to view the current water temperature and their preferred temperature setting. By learning the average shower time for each user, the showerhead can also encourage water conservation by suggesting shorter shower durations. Our showerhead would incorporate various elements such as sensors for detecting shower head position and water temperature, motors for positioning the showerhead, a controller for managing profile data and shower head movement, a display for displaying profile information and water temperature, and a sturdy physical structure suitable for most shower setups.

# Solution Components:

## Subsystem 1 (Sensor Subsystem):

The Sensor subsystem will consist of an accelerometer to collect data on the position of the showerhead in relation to Earth’s gravity, a temperature sensor to measure the temperature of the water flowing through the shower head, and a water flow sensor to detect if the shower is on so we can measure the shower duration. The sensor subsystem will also consist of a communication device to communicate with our remote control subsystem and send the data acquired from the sensors. These sensors will all be placed in the physical subsystem in a separate compartment to avoid water leaking into the sensors.

Accelerometer: ADXL345

https://www.amazon.com/Adafruit-ADXL345-Triple-Axis-Accelerometer-ADA1231/dp/B01BT4N9BC/ref=sr_1_6?keywords=accelerometer&qid=1674700283&sr=8-6

Temperature Sensor: DS18B20

https://www.sparkfun.com/products/11050

Water Flow Sensor: 1597-1516-ND

https://www.digikey.com/en/products/detail/seeed-technology-co-ltd/114991177/7387420

## Subsystem 2 (Positioning Subsystem):

The showerhead will also have a motor to add 1 rotation axis to the shower head to position it to the user’s preference. This motor will attach to a joint in the shower head and move the joint up when rotated one direction and vice versa to move it down. The chosen motor will have high torque and very low speed so that customization for the user is easier. Our option for a motor is the DC motor as it has a high starting torque.

Motor: JGY-370

https://www.amazon.com/Bringsmart-Turbine-Electric-Self-locking-JGY-370/dp/B07FD98N8J/ref=sr_1_2?gclid=Cj0KCQiAw8OeBhCeARIsAGxWtUwBLTCz0UFqaNAR19nPhGkZedCicuhl85gGYoDwjRzrCFuRCj0fOkYaAt70EALw_wcB&hvadid=384322822234&hvdev=c&hvlocphy=9022196&hvnetw=g&hvqmt=b&hvrand=15085001523702390373&hvtargid=kwd-385077632050&hydadcr=8434_9618941&keywords=low%2Bspeed%2Bmotor%2Bdc&qid=1674701110&sr=8-2&th=1

## Subsystem 3 (Physical Showerhead Subsystem):

For the physical subsystem we are planning on making a 3-d printed shell to make room for the sensor and positioning subsystems as well as space for the actual shower head. The 3-d printed showerhead will mimic most other showerheads in design but include space for sensors and motors to move the showerhead.

## Subsystem 4 (Remote Control Subsystem):

The remote control subsystem will communicate with the sensor and positioning subsystem and will have a raspberry pi to store user data and display it to the display subsystem. The remote control subsystem will also have a control to move the position of the shower head. A joystick will be attached to the remote control subsystem that will be able to communicate with the positioning subsystem and move the physical showerhead to the desired location. The display and remote control subsystems will be disconnected from the actual showerhead and communicate with the showerhead using another communication device.

Raspberry PI : SC0510

https://www.microcenter.com/product/643085/pizero2w?src=raspberrypi

Communication Device: 1597-101990981-ND

https://www.digikey.com/en/products/detail/seeed-technology-co.,-ltd/101990981/16570945?utm_adgroup=Seeed%20Technology%20Co.%2C%20LTD.&utm_source=google&utm_medium=cpc&utm_campaign=Shopping_DK%2BSupplier_Tier%201%20-%20Block%202&utm_term=&utm_content=Seeed%20Technology%20Co.%2C%20LTD.&gclid=Cj0KCQiAw8OeBhCeARIsAGxWtUwG39PuVvJmQc2wMEMMwPOC3TXsFfnmmdyhkOCejJKQ6LNssnmC9gYaAvDWEALw_wcB

Joystick: 108-THB001P-ND

https://www.digikey.com/en/products/detail/c&k/THB001P/11687191?utm_adgroup=Navigation%20Switches%2C%20Joystick&utm_source=google&utm_medium=cpc&utm_campaign=Shopping_Product_Switches&utm_term=&utm_content=Navigation%20Switches%2C%20Joystick&gclid=Cj0KCQiAw8OeBhCeARIsAGxWtUzvjqUbI3eIGeC2eboiJbUuwhIz2HG6AQwAD6CnUdDfo5_368jM08AaAi_yEALw_wcB

## Subsystem 5 (Display Subsystem):

We will attach a display to the remote control subsystem so that information collected by the sensor subsystem such as duration of shower, water temperature, and position can be displayed to the user. The display can also be used to show what user is active and allow users to select their profile when beginning the shower. The display and remote control subsystems will be disconnected from the showerhead itself and able to be placed anywhere in the shower.

Display: NHD-2.4-240320CS-CTXI#-FT

https://www.digikey.com/en/products/detail/newhaven-display-intl/NHD-2.4-240320CF-CTXI%23-FT/5209661?utm_adgroup=Optoelectronics&utm_source=google&utm_medium=cpc&utm_campaign=Shopping_Supplier_Newhaven%20Display%20Intl_0757_Co-op&utm_term=&utm_content=Optoelectronics&gclid=CjwKCAiAoL6eBhA3EiwAXDom5jzzoB8yeT2P9AaCyGGPeD4VBZHH3EnTSgczHfHkxkdWIvbkh_4DmhoCLcgQAvD_BwE

# Criterion For Success:

To be successful our shower head should be able to save multiple user’s data and display the user’s average shower time, user’s preferred temperature, and current water temperature. Furthermore our showerhead should have accurate temperature readings making it easier for the user to set the dials to their desired temperature. The showerhead should also be able to record its position and recreate its position after any movement. With all these features, the main goal of our project is to enhance the user’s shower experience.

Healthy Chair

Ryan Chen, Alan Tokarsky, Tod Wang

Healthy Chair

Featured Project

Team Members:

- Wang Qiuyu (qiuyuw2)

- Ryan Chen (ryanc6)

- Alan Torkarsky(alanmt2)

## Problem

The majority of the population sits for most of the day, whether it’s students doing homework or

employees working at a desk. In particular, during the Covid era where many people are either

working at home or quarantining for long periods of time, they tend to work out less and sit

longer, making it more likely for people to result in obesity, hemorrhoids, and even heart

diseases. In addition, sitting too long is detrimental to one’s bottom and urinary tract, and can

result in urinary urgency, and poor sitting posture can lead to reduced blood circulation, joint

and muscle pain, and other health-related issues.

## Solution

Our team is proposing a project to develop a healthy chair that aims at addressing the problems

mentioned above by reminding people if they have been sitting for too long, using a fan to cool

off the chair, and making people aware of their unhealthy leaning posture.

1. It uses thin film pressure sensors under the chair’s seat to detect the presence of a user,

and pressure sensors on the chair’s back to detect the leaning posture of the user.

2. It uses a temperature sensor under the chair’s seat, and if the seat’s temperature goes

beyond a set temperature threshold, a fan below will be turned on by the microcontroller.

3. It utilizes an LCD display with programmable user interface. The user is able to input the

duration of time the chair will alert the user.

4. It uses a voice module to remind the user if he or she has been sitting for too long. The

sitting time is inputted by the user and tracked by the microcontroller.

5. Utilize only a voice chip instead of the existing speech module to construct our own

voice module.

6. The "smart" chair is able to analyze the situation that the chair surface temperature

exceeds a certain temperature within 24 hours and warns the user about it.

## Solution Components

## Signal Acquisition Subsystem

The signal acquisition subsystem is composed of multiple pressure sensors and a temperature

sensor. This subsystem provides all the input signals (pressure exerted on the bottom and the

back of the chair, as well as the chair’s temperature) that go into the microcontroller. We will be

using RP-C18.3-ST thin film pressure sensors and MLX90614-DCC non-contact IR temperature

sensor.

## Microcontroller Subsystem

In order to achieve seamless data transfer and have enough IO for all the sensors we will use

two ATMEGA88A-PU microcontrollers. One microcontroller is used to take the inputs and

serves as the master, and the second one controls the outputs and acts as the slave. We will

use I2C communication to let the two microcontrollers talk to each other. The microcontrollers

will also be programmed with the ch340g usb to ttl converter. They will be programmed outside

the board and placed into it to avoid over cluttering the PCB with extra circuits.

The microcontroller will be in charge of processing the data that it receives from all input

sensors: pressure and temperature. Once it determines that there is a person sitting on it we

can use the internal clock to begin tracking how long they have been sitting. The clock will also

be used to determine if the person has stood up for a break. The microcontroller will also use

the readings from the temperature sensor to determine if the chair has been overheating to turn

on the fans if necessary. A speaker will tell the user to get up and stretch for a while when they

have been sitting for too long. We will use the speech module to create speech through the

speaker to inform the user of their lengthy sitting duration.

The microcontroller will also be able to relay data about the posture to the led screen for the

user. When it’s detected that the user is leaning against the chair improperly for too long from

the thin film pressure sensors on the chair back, we will flash the corresponding LEDs to notify

the user of their unhealthy sitting posture.

## Implementation Subsystem

The implementation subsystem can be further broken down into three modules: the fan module,

the speech module, and the LCD module. This subsystem includes all the outputs controlled by

the microcontroller. We will be using a MF40100V2-1000U-A99 fan for the fan module,

ISD4002-240PY voice record chip for the speech module, and Adafruit 1.54" 240x240 Wide

Angle TFT LCD Display with MicroSD - ST7789 LCD display for the OLED.

## Power Subsystem

The power subsystem converts 120V AC voltage to a lower DC voltage. Since most of the input

and output sensors, as well as the ATMEGA88A-PU microcontroller operate under a DC voltage

of around or less than 5V, we will be implementing the power subsystem that can switch

between a battery and normal power from the wall.

## Criteria for Success

-The thin film pressure sensors on the bottom of the chair are able to detect the pressure of a

human sitting on the chair

-The temperature sensor is able to detect an increase in temperature and turns the fan as

temperature goes beyond our set threshold temperature. After the temperature decreases

below the threshold, the fan is able to be turned off by the microcontroller

-The thin film pressure sensors on the back of the chair are able to detect unhealthy sitting

posture

-The outputs of the implementation subsystem including the speech, fan, and LCD modules are

able to function as described above and inform the user correctly

## Envision of Final Demo

Our final demo of the healthy chair project is an office chair with grids. The office chair’s back

holds several other pressure sensors to detect the person’s leaning posture. The pressure and

temperature sensors are located under the office chair. After receiving input time from the user,

the healthy chair is able to warn the user if he has been sitting for too long by alerting him from

the speech module. The fan below the chair’s seat is able to turn on after the chair seat’s

temperature goes beyond a set threshold temperature. The LCD displays which sensors are

activated and it also receives the user’s time input.

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