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Hygro Harmony

#IoT #Arduino #C++ #3D-Printing



The "HYGRO HARMONY" humidifier is a sophisticated product that leverages the hygroscopic behavior of wood and ultrasonic atomization technology to enhance indoor air quality by maintaining optimal humidity levels. It is constructed with eco-friendly maple wood veneer, combining functionality and aesthetics. The humidifier is designed to be responsive to humidity changes, ensuring even moisture distribution and automatic humidity control. Essential design metrics such as durability, humidity sensing accuracy, noise level, size, and ease of assembly have been carefully considered to deliver a high-quality and user-friendly product.

1. Case Design

  • Compact, enclosed case for all controller components

  • 50% reduction in size and weight(final volume under 996 Cu. In. & final weight less than 21 lbs)

  • Ability to support a 10lb static load

2. Minimum Power Requirements

  •  Provide at least 12 volts at 2 amps per motor

3. Command Execution

  • Software developed in C++

  • Process encoder signals from each motor

  • Allow command-line input

4. Functionality

  • Maintain the full range of motion outlined in Scorbot VII user manual

  • Operate the arm with a maximum payload of 4.4 lbs

  • Manipulate the robot by rotating each motor individually

The aforementioned project was done in accordance with the final project requirement for MECH 447: Mechanical Design II at the University of Nebraska-Lincoln. This group project was accomplished in a span of 15 weeks during the Fall 2019 term. Other members of the team included Drew Jerred and Connor Kaeding. Within the allocated time for this project, the design team held weekly meetings throughout the semester with the sponsor of this project, Dr. Carl Nelson, to provide updates on the progress and adjust the output result based on the specific needs of the sponsor. At the end of this period, the aforementioned deliverables were successfully met. A compact case with a volume of 154 cubic inches and an overall weight of 0.89 pounds capable of supporting 10 pounds of the external load was 3D printed. The prototype’s cost was $287.84, with a custom-designed PCB taking $67.00 of the expenses. Moreover, sufficient power was successfully provided to operate the motors. Command execution and functionality deliverables were also achieved.


The full report detailing the approach to accomplish the above tasks with justifications to the decisions made for each phase can be found below. 

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