156B Week 6

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

• • Now have unified code for communication via app and temperature control

  • Purchased and awaiting capacitors and inductors for filter implementation

Accomplishments from Previous Week

• • Finished debugging code for bluetooth communication with phone (can now set reference temperature through phone)

  • Combined bluetooth communication code with temperature control code

  • Implemented safe temperature range checks in controller code

  • Successfully send data from phone to directly effect controller. Basic bug testing wireless communication 

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

• • Figure out circuit and code for RTD (Justin)

  • Look into conductive film/cloth for covering TED (Justin)

  • Purchase circuit elements required for RTD circuit (Tom, Kam)

  • Research options for implementing reverse current control on microcontroller, i.e H-bridge (Jeffrey)

  • Test and debug unified bluetooth+temperature control code (Tom, Kam)

  • Acquire oscilloscope (Tom, Kam)

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

• • Sponsor stated cost of mass production of TED itself will be quite low (5/3, via email)

  • Sponsor confirmed that +/- 1 degree (C) is adequate for temperature controller (5/3, via email)

  • Sponsor stated that a thin membrane covering the TED (protect from dirt/debris) is necessary (5/3, via email)

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

• • Use vertical orientation of TEDs to dissipate heat via natural convection more effectively (4/27/20, via zoom)

  • May insert fins (not very densely) (4/27/20, via zoom)

  • Use integral capping algorithm to eliminate integrator windup issue (4/27/20, via zoom)

    • Test for integrator windup issue by incrementing 2-3 degrees at a time

  • Introduce derivative action into controller to reduce overshoot (4/27/20, via zoom)

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

• • Fix the overshoot in temperature rise (4/27/20, via zoom)

Risks and Areas of Concern

• • None

Resources or Information Required but not Available

• • Get Oscilloscope this week 

Schedule

• • Finish performing control on commercial TED with full functionality (wireless, bidirectional operation)

Budget (list amount spent and amount remaining)

• • Spent $394.61 (Remaining $1605.39)

Progress on Report and Webpage

• • Updated chapters 2, 3, 4, and 5 of report

  • Completed first draft of report

  • Updated webpage layout