Howdy!
We have been hard at work assembling and testing our device.
At our 3rd and final demo with Prof Khamesee, we were able to show the small/discreet package of the device and how it is worn on the body. We also demo’d the Peltier’s cooling ability in both automatic (via temperature sensing) and manual mode. Lastly, we reiterated our weight, cost, and functional goals and demonstrated that the criteria was met (the most surprising spec is that the weight limit we set was 200g and our device is 70g!).
After some iterations, this is the fit that we showed at the demo. We also have some videos:
https://drive.google.com/file/d/19ioTqLlf9I7HoRo3R_0iQajqNgfZNt75/view?usp=sharing
https://drive.google.com/file/d/12Z1O2lxkExa73_eqQdRI2otJniDKsd6M/view?usp=sharing
Since then, we have printed a new case that is slightly smaller, has tighter tolerances around cut-outs, and one that has some cosmetic improvements - we will be sure to share the final look when everything is assembled.
In terms of PCB bring up, we have populated several copies of the device so that the mech and FW teams can develop concurrently. We found a footprint error with our MOSFETs and have since made and tested a workaround:
Our team has pretty much exclusively only been in RPC or the Gear Lab these days, working on making sure the symposium goes smoothly. These places on campus are great places to find super knowledgeable and generous peers who are willing to help us debug and problem-solve. Truly thankful for them and the sense of community!
Our most recent endeavour was to integrate tetherless operation with a rechargeable battery, and we were fortunate enough to have been given some extra test batteries from a team member’s previous workplace. Updates on this will be given - we have confirmed that the battery charger module works, but are currently investigating a MOSFET circuit performance issue (related to load sharing protection).
Finally, we have submitted our poster to W Print for the early bird discount!
And just because it is such a cool graphic, here is a closer look at the updated exploded and isometric views (the mech team has been busy iterating):
