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Team Vision for Detailed Design Phase
To further elaborate on the hardware, software, and enclosure designs created during the last phase, as well as fully finalize a BOM and gather more test data on laundry machines to ensure that the Laundry Bug is adaptable to as many laundry machines as possible.
Progress Report
By the Detailed Design Review, the team is looking to have the enclosure design and PCB layout for the transmitter finished, and progress made on the enclosure/PCB design for the receiver. We are also looking to have all of our test plans situated, and an updated BOM. currently, the majority of the design for the transmitter enclosure and PCB have been completed, and the test plans have been populated. In addition, the BOM has been updated with the new components included in the PCB design. All that remains is to finalize the transmitter designs, which should be finished by the Detailed Design Review. Currently it has been decided that our design currently only works for 120V cables, however it is included in our test plans to test the device for 240V cables as well.
Prototyping, Engineering Analysis, Simulation
The next couple of diagrams show models of what the transmitter and receiver diagram of the enclosures will look like:
The transmitter enclosure is below, showing the connection to the wall for a 120V connection. All transmitter hardware would ideally fit inside of this enclosure. The original document can be viewed here,
The prototype enclosure of the receiver is shown below. There is a 3D rendering of the enclosure as well as a 3D print of the enclosure. This was an open source design. This design is to modified to be more robust and scaled to fit all the components of the design.
Code
Below are the different software code that have been used on the project to test the feasibility of capturing data related to current draw, alert the user that the laundry is completed, and the communication between two ESP32s.
Below is the code used to capture the original data using an Arduino Uno.
Below are the 10 data sets that were captured using the above code.
Data5_Delicates_Full_Load.xlsx
Data6_Quick_Wash_Full_Load.xlsx
Below is the code used to capture data using an ESP32. Several things needed to be modified in order to get the code to work properly. First, the input pin for the ESP3 is PIN34, this was PIN1 on the Arduino Uno. Second, the baud rate was increased to better utilize the improved performance of the ESP32. And third, the DC offset value was increased to 2048 to be half of the 12 bit analog to digital converter.
Below is the code used to test the communication possibilities between two ESP32s.
Drawings, Schematics, Flow Charts, Simulations, etc.
Transmitter Design files:
Schematics:
2D PCB layout (dimensions in mils):
3D PCB layout:
The full PDF can be viewed here.
Receiver Design files:
Schematics:
2D PCB layout (dimensions in mils):
3D PCB:
The full PDF can be viewed here.
Bill of Material (BOM)
These document images were downloaded from the Altium Design Files and converted into Excel documents.
The link to the previous BOM which included a total cost can be found here.
The link the to purchasing template can be found here. The team has only made one purchase so far.
Test Plans
After compiling all of our Customer and Engineering Requirements together, the team put together a total of 7 test plans to encompass all of the engineering requirements. A sample of one of the test plans can be seen below, and the whole document with the remaining test plans can be viewed here.
System Design and Flowcharts/System Block Diagram
The Software Diagram has been updated to include a push button on the receiver that will turn off the alarm notification. The full document is attached to this page as "Software Flow Diagram"
The System Diagram has not had any changes since the previous phase review, and its full document can be viewed here.
Risk Assessment
Since the last review, we have added a risk (risk 12) that any member of the team is diagnosed with COVID, leading to delays. This updated Risk assessment can be seen below, and the full document can be accessed here.
Design Review Materials
Include links to:
- Pre-read
- Presentation and/or handouts
- Notes from review
- Action Items
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