5.7.2020
5.10.2020
Prof. Notash send an email welcoming the team to the Senior Design course. Online meeting options were presented and the new syllabus was made available. Prof. Notash also identified differences between this course and the proposal course for the report requirements.
Group Communication regarding purchasing components, discussed what parts should be bought as soon as possible and what could wait for another order. Kevin shared researched links for possible purchase.
5.20.2020 - 5.21.2020
There was communication via email with Prof. Cara about creating a circuit that will allow all components of the headset to be switched on at the same time. This process would be triggered by detecting if there is a current flow between the trigger device (Vufine board) and the power source.
The first methods discussed to achieve this involved the use of an optocoupler. The trigger device would have a ouptocoupler in series with it and when the trigger device turns on, the current flow would trigger the normally-open optocoupler to close, allowing the other devices to turn on.
The second method discussed involved the use of an op-amp to detect the small voltage drop across a sensor resistor that is in series with the trigger device. When the device is turned on, the differential op-amp would amplify the small voltage drop across the sensor resistor enough to bias the base terminal of a transistor. The other devices would then be pulled to ground by being connected to the collector of this transistor.
Component requirements were then discussed for both methods and specific components were suggested by Prof. Cara. The importance of testing the circuit design before applying them to the more expensive components was also stressed by Prof. Cara.
5.22.2020
There was correspondence between team members about the correct use of an op-amp. Text concerning the use of op-amps were shared between team members.
Sent an email to Prof. Notash updating him on the progress of the project. Each team member’s status for their respective responsibilities was shared with Prof. Notash.
Marty:
Main focus has been the cooling system and module. All parts needed have been received except the Beetle micro controller and I have researched examples, and various circuits. Currently coding (troubleshooting) the thermistor input (on another microcontroller for now), then will move on to coding the fan speed output based on the temperature reading. Building the circuit and testing should be completed by the end of next week, earlier next week. Then will work on installing the system inside of a “cheaper test bag” to see what problem might be encountered there. As I have been working on the above I have also started to test the individual components. USB Camera is working, and I have coded an image capture, and a video capture. Other researching has been taking place as well. I made myself familiar with the feather and beetle microcontrollers that I will be using. Also getting aquintanted with the capacitive touch sensor, how to wire, and program. After the cooling module is completed I will be moving on to the much more difficult task of the controller module. So I’m hoping to start on this by end of next week by getting the feather and touch sensor working together.
Kevin:
My main focus up to this point has been to get the headset done. I should be able to have everything done by mid June. This includes the 3D printed case. Currently, all the components are stripped down to their boards and are being externally powered. I had already tested them to know that they are communicating as expected. So the main thing I am currently working on is powering them all via a rechargeable battery. The next hurdle that I have to overcome is turning on all the components with one button press.Concerning the programming, I've bushed up on the libraries that I have to use. I'm focusing on the headset first because I can "rush" the coding towards the end if needed, but i cannot do that with physical components that I may need to order.
5.28.2020
Team members had conversation about coordinating updates to the website. Progress on the project report was also discussed.
There was communication via email to setup a meeting between the team and Prof. Notash for the following day.
5.29.2020
The online meeting with Prof. Notash covered four aspects ofthe project: current progress, future plans, troubleshooting problems and progressdocumentation.The team members shared their current progress on theproject. The focus for the first part of the development focused on the bag and the headset. The issue of turning on all the components of the headset with a singular user input was covered. Parts needed for the backpack were delayed, but the current progress on the cooling system was shared. The microcontroller for the cooling system was accurately measuring the temperature values. Kevin shared his plans going forward to complete the headset within two weeks. This would involve getting a 3D printer to produce the housing for the device and completing the switching circuit. Martin also planned to have the backpack system completed within that timeframe because the ordered parts would be delivered by then. Prof. Notash also suggested looking into patenting and publishing the idea. There was a question concerning measuring the internal resistance of a PCB. An effort was made to discern the test points on the Vufineboard that would allow for the measurements to be obtained. There was also an attempt to find any online technical information on the Vufine. No sources werefound, and Prof. Notash suggested contacting the manufacturer directly to ascertainthe relevant information. Prof. Notash shared concerns with the website design, the meeting minutes section of the website, and an updated version of the budget. The two versions of the website were deemed to be unwieldly, so consolidating the information into one website while keeping a similar format was suggested.The meeting minutes section was empty up to this point because it waspreviously used, in the proposal section, to record in-person meetings betweenthe team and the supervisor. Prof. Notash suggested expanding the entry criteria to include various conversations between team members and other relevant persons. Prof. Notash suggested that there be two budgets, one that memorializes the proposed budget, and another that tracks the current budget for the design phase.Team members had a conversation about workarounds for thelack of access to tools usually available via Valencia’s facilities.
6.10.2020
Zoom meeting with Professor Notash on Wednesday June, 10th. Meeting was originally schedule for Monday the 8th, but due to delays in parts (Power Transistor) and schedule changes the meeting was moved to Wednesday at 2pm.
Martin reported that the cooling module is mostly complete, but it has been made using PWM to control the fan speed instead of the intended MOSFET circuit that would vary the voltage to control fan speed. Also reported the Beetle microcontroller is having communicating problems, the system is modeled on an Arduino Mega2560 board at the momment.
6.12.2020
Martin has sent an email requesting the usage of some lab equipment at home. The email and response are as follows.
Good Afternoon,
As a student currently participating in the Senior Design course, and currently building their project.I would like to explore the possibility of borrowing Valencia's BSECET lab equipment for usage at home.
I know it may be late in the process to be requesting something like this amidst the COVID-19 closures and
procedures in place at the moment. I am just now realizing it would be a great convenience to have continual
and easy access to an oscilloscope, and a power supply for general troubleshooting as it happens, and data collection.
I am not currently needed any equipment to proceed, at the moment, so this is not an urgent matter. It would just
be really great to have instant access to real equipment we are familiar with to easily examine our systems. The little conveniences like have a nice multi-meter with alligator clips would be nice. Also thinking about possible future troubleshooting needs, and if monitoring all of our Bluetooth signals with a spectrum analyzer may be a useful tool, and provide useful data to report.
I know safety may be a concern with equipment usage, especially since I am asking to take the pieces home. So I would be
happy to sign any agreement that would release the school from liability, and make me responsible for any damages.
Thank you for your time,Martin MacNeill and The Leitch-MacNeill Design Team
I wanted to cc: Will from the open lab on this but couldn't locate his email.
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Martin,
Will is copied who can help you out with your request.
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Hello Marty,
Thank you for letting us know of your group's needs. There should not be any problems to check out the needed equipment. Please work with Will (included in this reply) to coordinates any access requirements to the labs or use of.
Best,
Prof. Notash
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A follow up email to Will may be needed - mm 6/23/2020
6.14.2020
Communication between group members regarding website updating. We discussed to need make a push for more in depth project details on the website, and knowing the report is due in a month, and presentations on 7.20.20
Team members had a discussion on how to proceed with Beetle Microcontroller. Martin has found very little documentation on the microcontroller and how to troubleshoot the connection issues and the only troubleshooting technique discribe in the official literature do indeed admit the timing of reseting and being able to upload code is in the microseconds. It was decided to not waste anymore time on the beetle and a Arduino Nano has been selected to replace the Beetle in the Cooling Assembly.
6.23.2020
Progress meeting may be needed soon. It is getting to the point where the Team member may need to meet up in person for bag installations decisions.
Some options like battery placement, cable management, micro-controller installation position, fan position can all have an affect on the overall system performance. Group will need to meet to 3D print controller case, and External Hub 3D printing.
6.28.2020
Group Meeting:
Discussed finishing details for the camera mount, the need for an additional 3D print for the camera. The camera will then will mounted by velcro to the desire location. Multiple velcro attachment areas may be possible for many options.
Talked about controller progress, and the set back with feather MC being damaged. Marty has reordered the device but it might not arrive in time. Ideas on 3D printing/ PCB and general assembly were discussed, and the design was modified to excluded the side buttons.
7.5.2020
Group Communication via Texts
Since controller progress has been stalled Kevin has offered to take over the controller to finish it up. This will allow Marty to focus on the data collection, the report and general documentation that will be due very quickly.
Also due to the controller assembly not on schedule the competition of the finger print scanner is in question. It has been decided that the fingerprint device will be left out of the 3D printed controller design. If there is time the fingerprint scanner can be added to the still on breadboard prototype phase controller since we will have an additional feather MC board to work on.
Kevin will email Professor Notash to inform and update.
7.13.2020
Zoom Meeting with Professor Notash scheduled for 1pm on Monday 7.13.2020.
The controller was talked about at length, and it was brought to the attention of Prof Notash that the size of the current controller design is larger than expected. The dimensions are 88mm by 57mm and it is a concern that it is not quite the keyfob design proposed, and more like a remote controller. Some ideas were discussed to reduce the size of the controller. Prof Notash had an excellent idea to change our physical button design to a touch screen device, and it was well received by all, and plans to change the design have begun.
The plan for the camera was discussed and shown. Velcro will beinstall on Friday during the group meeting we have planned.
The backpack and cooling system were discussed, and the fan installation was shared. Progress needs to be made on the testing, validation, and evaluation of cooling system.
It was also talked about the projects progress and the time schedule. We are running behind, and we feel like we could rush and get everything done, documented in time. But if we are to make changes to a major design choice like physical buttons and ajoystick to all touch screen navigation more time will be needed. More time would also allow for better testing of the systems all working together, benefiting the documentation and reporting, and overall presentation. As it is right now we would be integrating all systems and testing on Friday 7.17.20 trying to get it all in the report by Monday 7.20.20. A decision on a time extension will be made by Wednesday 7.15.2020.
7.15.2020
Emailing with Professor Notash:
A decision on a time extension will be made by Wednesday 7.15.2020.
7.17.2020
Group Meeting planned for installation and testing.