Concept

Our concept is simple

Our project will allow makeup users the ability to create unlimited shades of powdered makeup that cosmetic stores can’t provide, in a cost-effective and quick manner. The prototype uses an iOS app, Bluetooth-enabled smartphones, and an embedded printer component which incorporates fuel injector technology.

The Motivation

Currently, people are forced to choose between cheap limited shades of makeup and expensive unique shades.

With our prototype users will be able to print any color of makeup from home, using inexpensive base powder and selecting a color on the accompanying Chroma app.

Competition

Mink Pen

Our most direct competition, the Mink Pen is a product built for manually measuring ink and mixing your own makeup, a time consuming and messy process of over 12 required steps. Our product would eliminate all manual work the pen requires, allowing the user to simply select a color on the app and press print to have the Chroma printer give you an eye shadow substrate with the correct mix of CMY values. Read more about Mink here

MODA Printer

The MODA Printer has the user select a makeup look on a mobile app, place your face into the printer and will therefore spray the makeup directly onto your face. Our Chroma Makeup Printer provides the right amount of technology involvement in the makeup process by accelerating how makeup is created but not by putting the user at safety risk. Read more about MODA here

Requirements

Functional Requirements

Non-Functional Requirements

The user can select any color via the Chroma app using a color picker or by uploading an image

Quantity requirement: Quantity of the final product will be enough to last for 1-2 uses

Smartphone shall communicate with the Chroma printer via Bluetooth, and be able to send the CMY values from the app to the printer to begin a print job

Cost requirement: Chroma printer should be under $350, which is the price of competitive products

Upon receiving the message from the app, the Chroma printer shall expel atomized ink droplets proportional to CMY values onto a white powder substrate

Size requirement: Chroma printer should be smaller than a regular printer

The printer will expel ink droplets in such a fashion as to cover the whole substrate, as evenly as possible

Timing requirement: Chroma printer should take no more than one minute to prepare final product

Colour of the final product should be reasonably close to goal

Technical Specifications

Hardware

Specification

ATMega328p
Buy here on Digi-key
Cost: $3.70

8-bit microcontroller, Advanced RISC architecture, High Endurance Non-volatile Memory Segments (up to 32KB of in-system self-programmable flash program memory), Operating voltage between 1.8 and 5.5 V, Temperature range: -40 to 85 degrees Celsius

Stepper Motor Controller
Buy here on Mouser
Cost: $3.90

4 channel stepper motor controller chip.

Bluetooth Module
Buy here on Adafruit
Cost: $17.50

UART communication at 9600 baud, wireless UART adapter, 256KB flash memory, ARM Cortex M0 core at 16MHz, on-board 3.3 V regulation, 32KB SRAM

Stepper Motor
Buy here on Sparkfun
Cost: $14.95

Simple, but very powerful stepper motor with a 4-wire cable attached.

Photocell
Buy here on Sparkfun
Cost: $1.50

Light resistance around 1k Ohm, Dark resistance around 10K Ohm, Max Voltage = 150 V

White LED
Buy here on Sparkfun
Cost: $.95

Forward Volatge: min (3.2 V), max (3.4 V), Max Current: 20 mA, Power dissapation 105 mW

Fuel Injector
Buy here on Amazon
Cost: $34.54

GM electromagnetic valve that meters fuel into engine's intake cylinders, PWM actuated, Brand = ACDelco.

Aquatic Pump
Buy here on Amazon
Cost: $11.80

Mini DC brushless water pump used to apply pressure to fuel injectors.

Software Components

Xcode IDE by Apple allows us to create our iOS app in Swift programming language.

Download here

Atmel Software Framework simplifies the usage of microcontrollers, providing an abstraction to the hardware and high-value middlewares, is integrated in the Atmel Studio IDE with a graphical user interface or available as standalone for GCC, IAR compilers. Current version: 3.3

Download here

Protocol

Our product uses bluetooth communication between the iOS app and the printer through the Adafruit bluetooth module. Our microcontroller has the capability to communicate separately with the bluetooth module via UART

User Interaction Design

User Interaction Diagrams

Use Cases

									 Ideal Use Case 
									1.   User places substrate into the printer
2.  User launches the Chroma application, and selects a color from a color picker or from a picture in their photo library
3. The Chroma application sends the CMY values matching that color to the printer to initiate a job. The printer confirms there is a substrate in the printer and if so,attempts the print job
4. The printer sends a bluetooth message back to the phone application confirming that the print job was successful or explaining why the print job failed 


									 Error Cases 
									1. If there was no substrate in the Chroma printer detected
2. If the Chroma printer does not have enough CMY dyes
3. If there was a failure with controlling the stepper motor or the ink injection apparatus
4. If the phone failed to communicate with the printer via bluetooth

								

System Design

Chroma Makeup Printer

Mink Pen

MODA Printer

Functional Requirements

Non-Functional Requirements

Hardware

Specification

8-bit microcontroller, Advanced RISC architecture, High Endurance Non-volatile Memory Segments (up to 32KB of in-system self-programmable flash program memory), Operating voltage between 1.8 and 5.5 V, Temperature range: -40 to 85 degrees Celsius

4 channel stepper motor controller chip.

UART communication at 9600 baud, wireless UART adapter, 256KB flash memory, ARM Cortex M0 core at 16MHz, on-board 3.3 V regulation, 32KB SRAM

Simple, but very powerful stepper motor with a 4-wire cable attached.

Light resistance around 1k Ohm, Dark resistance around 10K Ohm, Max Voltage = 150 V

Forward Volatge: min (3.2 V), max (3.4 V), Max Current: 20 mA, Power dissapation 105 mW

GM electromagnetic valve that meters fuel into engine's intake cylinders, PWM actuated, Brand = ACDelco.

Mini DC brushless water pump used to apply pressure to fuel injectors.

Software Components

Xcode IDE by Apple allows us to create our iOS app in Swift programming language.

Atmel Software Framework simplifies the usage of microcontrollers, providing an abstraction to the hardware and high-value middlewares, is integrated in the Atmel Studio IDE with a graphical user interface or available as standalone for GCC, IAR compilers. Current version: 3.3

Protocol

Our product uses bluetooth communication between the iOS app and the printer through the Adafruit bluetooth module. Our microcontroller has the capability to communicate separately with the bluetooth module via UART

Ideal Use Case

Error Cases

Front View

Top View

Side View

Plate View

Electronics

Demo Day Apparatus

Select a Printer

Main Menu

Pre-set Palette

Print Complete Message