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# Title Team Members TA Documents Sponsor
58 Adherescent (Team 2) Auto Time Setting Scent Reminder
 Megan Shapland
Wenchang Qi
 Jiaming Xu design_document1.pdf
final_paper1.pdf
presentation1.pptx
proposal1.pdf
video
 Adherascent
# Adherescent (Team 2) Auto Time Setting Scent Reminder

Team Members:
- Megan Shapland (meganls2)
- Wenchang Qi (qi14)

# Problem

Daily Medication is imperative to health, but is often easy to forget as we grow older and the reliability of our memories, sight, and sound decrease. Traditional medication reminders are lost in the frenzy of notifications and sounds that we experience on a daily basis. (As presented by Gaurav Nigam and Brian Mehdian at Adherescent ) There also is an ease of use problem. Many adaptive devices are not adopted due to the intimidation of learning to work with a new technology, particularly with time setting and confusing user interfaces.

# Solution

We propose a smart pill dispenser that utilizes scent as the primary notification mechanism. The system is built around a custom-designed PCB integrating an ESP32 microcontroller module. This allows for Wi-Fi connectivity, enabling time synchronization and remote scheduling potential. When a scheduled dose is due, the system triggers a scent release mechanism. The scent persists until the user opens the correct pill compartment. We will achieve the scent generation by electronically interfacing with and controlling a commercial aroma diffuser. The system will also employ magnetic sensors to detect the precise open/closed state of each medication compartment to close the feedback loop.

# Solution Components

## Subsystem 1: Custom Control Electronics (PCB Design)

This subsystem is the central processing unit of the device. Instead of using a pre-made development board, we will design and fabricate a custom PCB to ensure a compact form factor and specific power requirements.

* Microcontroller: An ESP32 Module will be used as the core processor to handle logic and Wi-Fi connectivity.
* Power Management: The PCB will include a Voltage Regulator circuit to step down the external power supply (5V USB) to the voltage required by the logic circuits (3.3V).
* Programming Interface: A UART interface will be exposed on the PCB to allow firmware flashing and debugging via an external serial adapter.

## Subsystem 2: Olfactory Notification Interface

This subsystem is responsible for generating the scent alert. We will adopt a system integration approach to leverage existing reliable atomization technology.

* Primary Approach (Commercial Integration): We will reverse-engineer a commercially available Ultrasonic Aroma Diffuser. The control signals of the diffuser will be intercepted and managed by our main PCB.
* Isolation Circuit: To safely interface the low-voltage ESP32 logic with the potentially higher-voltage circuit of the commercial diffuser, we will design an Optocoupler Isolation Circuit on our PCB. This acts as an electronic switch, simulating physical button presses to trigger the scent without electrical risk to the microcontroller.
* Backup Approach (Thermal Diffusion): In the event that the commercial unit cannot be successfully integrated due to space constraints, we will implement a fallback mechanism using Thermal Diffusion. This involves a PTC Heating Element driven by a MOSFET on our PCB to gently heat a scent-infused pad, promoting rapid evaporation.

## Subsystem 3: Compartment State Detection

This subsystem verifies user compliance by monitoring the physical state of the pill box lids.

* Sensors: We will utilize Hall Effect Sensors placed on the PCB or routed to individual compartments. These non-contact sensors offer superior durability compared to mechanical switches.
* Triggers: Small permanent magnets will be embedded into the lid of each pill compartment.
* Logic: The system will read the sensor state to determine if the correct compartment has been opened. If confirmed, the microcontroller will immediately send a signal to stop the scent generation.


# Criterion For Success

1. Scheduling Reliability: The device must trigger the scent notification within 5 seconds of the scheduled medication time.
2. Scent Control: The system must successfully turn on the external diffuser via the custom isolation circuit and turn it off automatically when the pill box is opened.
3. Sensor Accuracy: The Hall Effect sensors must detect the Open and Closed states of the compartment with 100% accuracy across consecutive test trials.
4. PCB Functionality: The custom-designed PCB must successfully power the ESP32 module and handle the logic levels without overheating or resetting due to power fluctuations.

Electronic Automatic Transmission for Bicycle

Tianqi Liu, Ruijie Qi, Xingkai Zhou

Featured Project

Tianqi Liu(tliu51)

Ruijie Qi(rqi2)

Xingkai Zhou(xzhou40)

Sometimes bikers might not which gear is the optimal one to select. Bicycle changes gears by pulling or releasing a steel cable mechanically. We could potentially automate gear changing by hooking up a servo motor to the gear cable. We could calculate the optimal gear under current condition by using several sensors: two hall effect sensors, one sensing cadence from the paddle and the other one sensing the overall speed from the wheel, we could also use pressure sensors on the paddle to determine how hard the biker is paddling. With these sensors, it would be sufficient enough for use detect different terrains since the biker tend to go slower and pedal slower for uphill or go faster and pedal faster for downhill. With all these information from the sensors, we could definitely find out the optimal gear electronically. We plan to take care of the shifting of rear derailleur, if we have more time we may consider modifying the front as well.

Besides shifting automatically, we plan to add a manual mode to our project as well. With manual mode activated, the rider could override the automatic system and select the gear on its own.

We found out another group did electronic bicycle shifting in Spring 2016, but they didn't have a automatic function and didn't have the sensor set-up like ours. Commercially, both SRAM and SHIMANO have electronic shifting products, but these products integrate the servo motor inside the derailleurs, and they have a price tag over $1000. Only professionals or rich enthusiasts can have a hand on them. As our system could potentially serve as an add-on device to all bicycles with gears, it would be much cheaper.

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