Applications and Implications
I referenced Ms. Morrow's site for formatting this week's assignment.
What Will It Do?
My project will allow drivers with Tourette Syndrome to click a button that triggers a display to move into the rear window of the car and convey crucial medical information to a law enforcement officer at a traffic stop.
Who's Done What Beforehand?
As far as I have researched, there aren't any products similar to mine on the market any neurological conditions. The closest product I can find are Resources for Law Enforcement Officers from the Tourette Association of America, as well as Information Cards that people with Tourette's can hand to officers when they are asked for their liscense and registration. There is also a Virtual Customizable Tourette ID Card that serves a similar purpose. The problem with this approach is that it informs the officer of the conditions fairly late in the encounter at a traffic stop, and informing the officer as soon as possible is necessary to prevent escalation and misunderstanding.
What Will I Design?
I will make the following items for the project. The only pre-made parts are the button, bluetooth module, microcontrollers, e-paper display, and servo motor.
Physical Components
| Item | Description |
|---|---|
| Display Case | Case for the 7.5" e-paper display that can be mounted to a servo motor |
| Cup Holder Mechanism Container | Case for the electronics and where the trigger button will sit - should fit in driver-side cup holder |
| Rear Window Attachment | Mechanism for attaching the display mechanism and servo motor to the top rear of the inside of the car - exact mechanism TBD |
Electrical Circuits
| Item | Description |
|---|---|
| Button Mechanism | ESP32C3 using BLE to talk wirelessly to Raspberry Pi Pico when a button is pressed |
| Display Mechanism | Raspberry Pi Pico recieves BLE messages from ESP32C3 with the HM-10 BLE module and uses it to write messages to the e-paper, move the e-paper display with the servo, and (if time permitting) connect to an app to customize the message displayed |
Questions That Need To Be Answered
- How will I attach the display mechanism to the roof or rear window of the car?
How Will The Project Be Evaluated?
The minimum-viable product for my project will be considered successful if it meets all of the following criteria.
- When the button is pressed, the display is moved into the rear window
- There is a message shown on the display
- The display is visible from behind the car
Bill-Of-Materials
BOM Table
| Item | Count | Use | Cost | Link |
|---|---|---|---|---|
| 7.5" E-Paper Display | 1 | Display message in rear window | $57.99 | WaveShare |
| 6"X8"X1/8" Sheets of Black Acryllic | 3 | Case for display | $22.56 | Amazon (more than necessary) |
| 11"X19X"1/8" Sheets of Clear Acryllic | 2 | Frame for display | $29.99 | Amazon (more than necessary) |
| 20kg Servo Motor | 1 | Moving display | $11.99 | Amazon |
| Raspberry Pi Pico RP2040 | 1 | Display electronics | $9.95 | Amazon |
| Seeed Studio XIAO ESP32C3 | 1 | Cup Holder Electronics | $9.90 | Amazon |
| TP4056 Lithium Battery Charger Module | 1 set of 2 | Battery recharging | $10.99 | Amazon |
| Lipo Battery | 2 | Powering electronics | $46.48 | Amazon |
| HM-10 BLE Module | 1 | Wireless communication | $10.99 | Amazon |
| Screws and hex nuts | -- | Assembly | -- | -- |
| PCB Copper | -- | PCB boards | -- | -- |
| Black PLA Filament | -- | 3D printing | -- | -- |
| White PLA Filament | -- | 3D printing | -- | -- |
Calendar
- 5/25-5/29: order materials
- 5/30-6/2: Test display mechanics with servo, fix errors
- 6/3-6/4: Finish electronics
- 6/5: Finalize video and slide
Processes Used
| Process | Use |
|---|---|
| 3D Printing | Cup holder container |
| Milling | PCB boards |
| Laser Cutting | Display case and frame |
| Molding and Casting | Securing display in case? |