Weekly Assignments Final Project About me

Week 17 - Applications and Implications, Project Development

Project Applications and Implications

This week's brief: Plan a final project masterpiece that integrates the range of units covered, answering the questions given in the tasksheet.

Individual assignment:

Plan a final project masterpiece that integrates the range of units covered, answering:

Your project should incorporate 2D and 3D design, additive and subtractive fabrication processes, electronics design and production, embedded microcontroller design, interfacing, and programming, system integration and packaging.

Where possible, you should make rather than buy the parts of your project.

Projects can be separate or joint, but need to show individual mastery of the skills, and be independently operable.

Project Development

Prepare drafts of your final project summary slide (presentation.png, 1920x1080) and video clip (presentation.mp4, 1080p HTML5, < ~1 minute, < ~25 MB).

Put them in your root directory, and check that they are linked in the final presentation schedule.

What will it do?

Aura is a smart hair-oil dispenser that warms the oil to 60°C so it can be applied directly to the scalp through a comb-shaped nozzle. While dispensing, it also massages the scalp with three intensity modes: low, medium, and high, helping distribute the oil evenly and improve comfort. The heating is meant to help activate the oil’s minerals, potentially making results faster and more effective than using it at room temperature. Aura uses an internal 20 ml aluminum heating block, so it can work well even for people with long hair. This summarizes the core concept of how Aura will function.

AI Image Prompt

chat gpt prompt: I lost original prompt of this image. I gave screenshot’s from cad and then I told “generate this image in to product photography style make it clear and professional image”

AI Tool Used: ChatGPT

Who's done what beforehand?

Many companies make products like this, but I have not found one that combines a scalp massager and a heating function in a single device. Most brands offer these features separately, either as a massager or as a heater. Indulekha Bringha Hair Oil inspired the comb-style applicator design for my project.

Tru Hair

Tru Hair is a hair-oil brand that provides a heater with the oil. You can fill the container, plug it in, and after about 8 minutes apply the warmed oil using a brush or by hand. Tru Hair & Skin ,

However, the existing product has some limitations. The cap design is not very convenient, and the oil cannot be directly applied to the scalp easily during use.

Image Credits: Tru Hair & Skin

Indulekha Bringha Hair Oil

This company was among the first to offer a bottle with a comb applicator that allows direct application to the hair. However, it does not include a heating system inside the bottle; it only provides the oil and the comb-equipped bottle. They also hold a patent for the bottle thread.

Indulekha Hair Oil ,

Image Credits: Indulekha Hair Oil

Head massager

There are many companies in the market offering different varieties of head massagers. I do not have a specific brand to highlight here, but some models include vibration features in the comb.

You tube Project

Image Credits: Minomo

What Will You Design?

  1. A smart hair oil dispenser with oil heating functionality.
  2. A comb-style applicator for direct oil application.
  3. A vibration-based scalp massage system with multiple modes.
  4. A custom PETG enclosure for the device.
  5. A charging docking station with acrylic indication panel.
  6. Custom PCB and embedded electronics integration.
  7. A user-friendly product design for comfortable handling and use.

Bill of Materials (BOM)

Component Qty Specification Unit Price Total Source Purchase Link
ATTiny85 1 Microcontroller ₹0 ₹0 Lab Inventory Buy Here
FR1 PCB Board 1 PCB Fabrication Material ₹0 ₹0 Lab Inventory —
PETG Filament 1 Kg 3D Printing Material ₹1200 ₹1200 Online Buy Here
3mm Clear Acrylic 1 Dock Indicator Panel ₹100 ₹100 Local Market —
Mini Heater 1 12V PTC Heater ₹195 ₹195 Online Buy Here
Aluminium Block 1 40x40 mm Heating Block ₹150 ₹150 Local Market —
3.7V 500mAh Battery 1 LiPo Battery ₹100 ₹100 Online Buy Here
Coin Vibration Motor 2 6V Vibration Motor ₹67 ₹134 Online Buy Here
SMD Push Button 6 Tactile Switch ₹8 ₹48 Local Market Buy Here
SMD LED 6 Indicator LED ₹0 ₹0 Lab Inventory Buy Here
MOSFET N-CH SOT-323 1 Haptic Motor Driver ₹20 ₹20 Robu Buy Here
Schottky Diode 1 1A 100V Protection ₹3 ₹3 Robu Buy Here
220Ω Resistor 10 SMD Resistor ₹1 ₹10 Robu Buy Here
JST Connector 2 Male + 2 Female Battery Connector ₹30 ₹30 Online Buy Here
12V 3A Type-C Adapter 1 Power Adapter ₹350 ₹350 Online Buy Here
Estimated Total Cost ₹2240

AI Prompt for BOM Table Design

I used a Google Sheets screenshot as a visual reference to redesign and organize the Bill of Materials (BOM) table for my final project documentation. The goal was to create a clean, professional, and readable table layout with proper alignment, pricing, sources, and purchase links.

Create a professional Bill of Materials (BOM) table for a technical project documentation page. Use a clean white and light gray theme with black text. Include columns for component name, quantity, specification, unit price, total price, source, and purchase link. Keep the table modern, minimal, and easy to read. Use alternating row colors and proper spacing for better readability. Take inspiration from a Google Sheets style layout.

AI Tool Used: ChatGPT

What Parts and Systems Will Be Made?

  1. 3D printed PETG enclosure for the device.
  2. Charging docking station with acrylic indicator panel.
  3. Comb-style oil dispensing mechanism.
  4. Heating system for warming the hair oil.
  5. Vibration massage system using a coin vibration motor.
  6. Custom PCB and electronic control system.
  7. Battery charging and power management system.
  8. Embedded programming and temperature control system.

What Processes Will Be Used?

  1. 3D printing using PETG material for the device enclosure and charging dock.
  2. Laser cutting 3 mm transparent acrylic for dock indication.
  3. PCB fabrication using FR1 board material.
  4. Integration of heating system using an aluminium heating block.
  5. CAD modeling and product design using Fusion 360.

What Questions Need to Be Answered?

  1. How long can the device run with continuous vibration?
  2. Will the enclosure deform after heating?
  3. Is a charging dock necessary, or can everything be integrated into a single device?
  4. How can user safety be ensured?

How Will It Be Evaluated?

Slide and Video Making

Before starting the final project, I created a sample presentation slide and a demo video. I also tested uploading the documentation and media files by following the Fab Academy guidelines.

given below there are formates for the presentation slide and video clip:

Prepare drafts of your final project summary slide (presentation.png, 1920x1080) and video clip (presentation.mp4, 1080p HTML5, < ~minute, < ~25 MB), put them in your root directory, and check that they are linked in the final presentation schedule

Slide Making For Aura Smart

After finalizing the basic structure of the slide, I selected the download option, chose PNG format, and downloaded the slide image.

This is the template for the final presentation slide.

Video Editing

Final Presentation Video Testing

Since the final presentation video must be under 25 MB and less than 1 minute long, I first tested the workflow using a short draft video before creating the final version.

I edited the draft video using VN Video Editor. Even for a short test clip, the initial exported file size was large.

To reduce the file size while keeping acceptable visual quality, I compressed the video using HandBrake with the Fab Academy compression preset.

After compression, the file size was reduced significantly while maintaining good video quality. This testing helped confirm that the same workflow could be reliably used for the final one-minute presentation video without exceeding the Fab Academy file size limit.

  1. I opened VN Video Editor on my smartphone.
  2. I clicked the plus (+) icon.
  3. I added the required images and videos.
  4. I adjusted the speed, sound, transitions, and text.
  5. I selected the resolution and FPS according to the Fab Academy guidelines.
  6. Finally, I exported the video.

To reduce the file size while maintaining acceptable visual quality, I compressed the video using HandBrake with the Fab Academy compression preset.

Saheen shared the HandBrake compression preset file, and we installed and imported the preset before compressing the final presentation video.

There was a small issue in the HandBrake preset resolution settings, so we manually changed the resolution from 720p to 1080p before exporting the final video.

Next, we only needed to drag and drop the video into HandBrake for compression. Then, I clicked Start Encode, and the video was compressed and automatically saved to the selected download location.

then i pushed it to the repo.

After pushing the presentation.png and presentation.mp4 files to the repository, I verified the upload by checking the Fab Academy Final Project Schedule page to ensure that both the slide and video were correctly linked and accessible under my final project entry.

Final Project Documentation

Click the link below to view the complete documentation of my final project, Aura – Smart Hair Oil Dispenser.

Project Development Documentation

Documentation References