| Constraint Category | Constraint | Justification | Connection to Requirement |
Economic | The manufacturing process of the project cannot cost more than $500.00. | Each student gets $125.00 from the engineering department and this amount cannot be exceeded. | New |
| Global | N/A | N/A | N/A |
Environmental | The device should use the minimal necessary power source such as usage of batteries. | Improper disposal of batteries leads to contamination of air, soil, and water since they are made out of lithium. | Addressed by power source requirement 4. (Chapter 2.4) |
| Social | Results should easily be read – specifically by those who are 65+ years old (font size should be legible). | The device encompasses those who are visually impaired as well as the elderly. | Addressed by requirement 3 (Chapter 2.3) |
| Political | N/A | N/A | N/A |
| Ethical | Stored data cannot be shared with third parties. | Users must be informed that their results are being stored but not shared with anyone. | Addressed by data storage requirement 7.(Chapter 2.7) |
Health/Safety | Device must follow FDA requirements for sanitation. | Test strips are in contact with urine. Infectious pathogens can be transmitted if the device is not properly cleaned. | Addressed by sanitation requirement 5.(Chapter 2.5) |
| Patients cannot use pre-owned test strips. | This is forbidden by the FDA since it can lead to health risks as well as misleading and inaccurate test results. | Beyond project scope. | |
| The device must follow electrical safety standards IEC600601 | IEC 60601 must be followed by any medical device containing electrical components | Addressed by requirement 6(Chapter 2.6) | |
Manufacturability | Device is manufactured by a team of 4 only. | ChromaScan Health team consists of 4 individuals. | Not linked to requirement of device design – only limited by the senior design course. |
| The device must have the ability to be manufactured and go through the process of verification and validation testing using resources available to TCNJ students. | The resources will primarily come from the Engineering Department at TCNJ. | This is not linked to a requirement but has been taken into consideration when doing the specifications of the device. | |
| Devices must be designed and manufactured within the timeframe of the academic year 2023-2024. | The device must be presented by the end of the spring semester, so it must be manufactured before then. | Not linked to requirement of device design – only limited by the senior design course. | |
| Sustainability | Limit the amount of 3D printing material used. | Plastics are non-degradable | Not linked to requirement of device design but will be considered in the design. |
Author: guerreg2
Nov. 18th, 2023 to Dec. 8th, 2023
- All electrical design components have been selected after evaluation their respective decision matrix.
| Electrical Components |
| Arduino Nano |
| TCS3200 Color sensor |
| Battery Case |
| Screen |
| Motor Driver DRV8871 |
| Linear Actuator |
| Breadboard power supply |
| L7805 voltage regulator |
| 9V alkaline Battery |
- Team presented final project design on November 6th, 2023.
- Final prototype design has been created using Fusion360 Software among the three different design options.
Nov. 3rd, 2023 to Nov. 17th, 2023
- Team started ordering parts such as the RGB Color Sensor and Microcontroller.
- Hazard analysis of the device was performed.
- In the next two week, team will be working on ways to obtain RBG colors using the sensors and testing of this.
- Decision matrix of the screen, design material and motors are currently being evaluated.
Oct 21st,2023 to Nov. 2nd, 2023
- The decision matrix for the microcontroller, color sensor, and screen has been finalized. However, other design components are still under evaluation, including the motor and the isolated material for the device case.
- The team has elaborated on three designs for the device, with one of them being selected.
- All requirements, specifications and verification have been finalized.
- The team is currently waiting for approval to commence the process of ordering the necessary components with the intention of starting testing.
Oct 7th, 2023 to Oct 20th, 2023
- All requirements have been updated including specifications as well as way of testing these.
- The team has work in the Gantt chart for the academic year 2023-2024
- Budget was finalized and turned in
- The team has work in standards. There were seven standards one for each requirement.
- Currently, the team is working in the device design and design matrix.
Sep. 22nd, 2023 to Oct. 6th, 2023
- Device requirement 4 was updated and added to requirements list.
- The teams have been working in the device specifications. Currently, these are under review.
- Team has worked in realistic constrains and those were approved by advisor.
- Draft Budget has be done by the treasure, and it is actively being updated.