156B Week 7

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

• • Manufactured the aluminum body of water block

  • Designed a circuit with motor driver and voltage regulator  

  • Purchased all the circuit components

Accomplishments from Previous Week

• • Designed a water block which can be waterproof

  • Performed the Bang-bang control for one Peltier device

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

• • Complete manufacturing and assemble of water block (Khang and Josh)

  • Test the functionalities of the water block(Khang and Josh)

  • Build and test circuit to make sure it works, and extend the circuit to multiple temperature stages (Jacob and Zinan)

  • Start the PCB after testing the circuit (Jacob and Zinan)

  • Implement the derivative term in bang-bang control (Jacob and Zinan)

  • Research for the PID controls and find Kp and Ki for closed loop control (Jacob and Zinan)

  • Research the bluetooth module and buy required components (Jacob and Zinan)

  • Make a demonstration of device capability for presentation (all)

  • Prepare presentation (all)

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

• • Prefer Bluetooth over WiFi connection for user's interface (last Thursday, in person).

  • Specified temperature presets (last Thursday, in person).

  • Specified that skin interfaces should stick out 2-3 mm (last Thursday, in person).

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

• • Insufficient effort on report drafts; we started to seriously revised the draft. 

  • Meet with Steve; we met with Steve to discussed overall circuits and motor drivers.

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

• • N/A

Risks and Areas of Concern

• • Complexity of coding

  • The possibility of PID control of Peltier device

  • Overall size of control box and the main wire that connects to and powers the Peltier devices on the main device

  • How to prevent the circuit from water

Resources or Information Required but not Available

• • N/A

Schedule

• • Meet with sponsor (Wed)

  • Meet with professor (Thu)

Budget (list amount spent and amount remaining)

• Spent $342.58

• Remaining $2657.42

Progress on Report and Webpage

• • revised the first draft of the report