Final Project

Placeholder to the video

Description of the project

For my project, I'll develop wearable vest with output and inputs.I focused this project to security.

The vest contains LED lights and optical Fiber ,when a person is close to it the Leds lights will activate.

Initial vision of the project

Sketch

• Detects nearby presence from behind (proximity sensor).
• If someone gets too close, the leds turn on.

Objective

This vest helps people in their safety by alerting them when someone is nearby.

What does it do?

I am going to make a vest with the following features:

• The vest will protect people at night.
• The vest will be very practical because it will be easy to put on and take off.
• The vest will have LED lights and vibration.

Laser cutting

3D printing

Electronics design

Molding and casting

Interfaz and programming

🔁 Reflexión

Laser Cutting

I used laser cutting to precisely create the vest pieces based on a designed pattern.I designed this vest with bags in the costados and holes in the back to place the sensor.

I cut the fabric in parts using 100% polyester. The laser settings I used were:

• Power: 70%
• Speed: 30%

3D printing

To protect the sensor, I decided to design a custom case using SolidWorks and print it with a Prusa MK4. In this case, I left enough space for the sensor’s pins, an opening for the sensor to detect properly, and holes for screws to attach the case securely to the vest. I also added an extra screw so that the sensor's position can be adjusted as needed.

Modules for the Optical fiber

To give ligh to the optical fiber i made a modules

Molding and casting

To improve comfort in the vest's pocket area, I made a flexible case for the main PCB using Silicona 930, a soft and durable material suitable for wearables. I designed a simple mold in CAD and 3D printed it. Then I mixed parts A and B of the silicone (100:10 ratio), poured it into the mold, and let it cure at room temperature. The result is a soft, flexible case that protects the electronics and adapts to body movement, making the vest more comfortable to wear.

Molding and casting

To improve comfort in the vest's pocket area, I made a flexible case for the main PCB using Silicona 930, a soft and durable material suitable for wearables. I designed a simple mold in CAD and 3D printed it. Then I mixed parts A and B of the silicone (100:10 ratio), poured it into the mold, and let it cure at room temperature. The result is a soft, flexible case that protects the electronics and adapts to body movement, making the vest more comfortable to wear.

Inputs and outputs

Who's done what beforehand?

I reviewed other related projects and found some that inspire mine.

In my research, I found a mirror with several features, one of which is that it contains a motion sensor, and when it detects movement, it lights up the mirror.

• Mirror project

Another idea I found was this type of vest that protects people at night because it has integrated LED lights that make them visible.

• vest project

What sources did you use?

Material List

Material	Description	Link
Xiao RP2040	Microcontroller	[Link]
Velostat	Pressure-sensitive conductive material	[Link]
MB1000-000	Ultrasonic proximity sensor	[Link]
Vibration motors x2	Haptic feedback components	[Link]
Rechargeable battery	Power source	[Link]
Conductive sewing thread	Stainless steel 316L, 14 Ω/m	[Link]
Small terminal (2 screws)	For PCB connections	[Link]
Waterproof fabric (Tela Robben)	Outer layer of vest	[Link]
Vinyl textile	Decoration or surface graphics	[Link]
Velcro	Fastening system	[Link]
Black or magnetic zipper	For opening/closing the vest	[Link]
LEDs and resistors	Pre-resistored LEDs for sewing	i'm going to tried to do something like it: [Link]

Printing

Here is a possible render of my case.

Laser cutting design

Electronics design