156B Week 4

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• • Awaiting RLC filter and PID values before testing

  • Connector plugs (USB to JST) for charging batteries arrived

  • Commercial TEDs arrived

Accomplishments from Previous Week

• • Determined which RTD to use

  • Began modeling system for controls

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• • Finish modeling and choice of PID values (Justin)

  • Verify that key components (batteries, bluetooth modules, battery connector plugs, wall power supply, TEDs) purchased function as specified by manufacturer (Tom)

  • Communicate with prototype via bluetooth and app (Kam, Jeffrey)

  • Determine what type of non-electrolytic capacitor to use, and possibly the inductor depending on the capacitor (Jeffrey)

  • Begin testing control of commercial TED with prototype (All)

  • Troubleshoot code and fine tune PID values based on test results (Justin)

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• • Battery life: 1-2 hours is already considered good (4/17, via zoom)

  • Access to flexible TED will most likely not be possible (4/17, via zoom)

  • Have additional room in our design for an additional (rigid) TED (4/17, via zoom)

  • Takeaway: Assume no more TEDs will be available from sponsor. If possible, design armband prototype such that there is space to implement additional TEDs from sponsor in the future.

Instructor Comments from Last Meeting and Actions Taken to Address these Comments  (indicate date of comments and if via email or in person)

• • Look at custom H-bridge from team 6 last quarter

  • Look for an non-electrolytic capacitor to incorporate

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

• • None

Risks and Areas of Concern

• • None

Resources or Information Required but not Available

• • What the differences among PTFC, PTFD, and PTFM variations are for RTDs

Schedule

• • Test PID control of commercial TED as proof of concept for portable control of Dr. Chen's TED

Budget (list amount spent and amount remaining)

• • Spent: $256

  • Remaining: $1744

Progress on Report and Webpage

• • Updated "Impact on Society" and "Professional Responsibilities" sections on report draft

  • Updated "Criteria" and "Deliverables" section on website homepage