156B Week 5

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

• • Bought 10 sets of electronics

  • Finished soldering 8 sets of circuit onto the perf board

  • Tested two 12-V (7Ah) batteries in series and parallel 

  • Have working Arduino code; currently working on transferring it to MATLAB to create the GUI

Accomplishments from Previous Week

• • Finalized design of LED circuit and tested on breadboard

  • In process of soldering circuit onto perf board

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

• • Finish PCB design on Eagle by next Wednesday (Nick)

  • Look into Heat Sinks (Noor)

  • Test battery and circuit details and components (Simon & Nick)

  • Work on AutoCADing the entire casing of the system (Jen)

  • Finalize delta pads and temperature control (Jen)

  • Get Matlab code working (Noor & Simon)

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

• • We talked about issues in the coding and she clarified some issues with understanding how to simulate the frequencies (4/22 in person)

    • We have updated the code to get it working in Arduino and now are working on implementing it in Matlab

  • Showed her our initial battery tests proving our theoretical analysis that the battery will last for the experiment time (4/24 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)

• • Measure the current through all the components and calculate the current to see if the battery will last (4/23/14, in person)

  • See if most of the power dissipation is through the transistor or the LEDs (4/23/14, in person)

  • Look into whether or not there will be a PCB fatigue problem with different materials on the LEDs and PCB (4/23/14, in person)

  • Thermal expansion mis-match with PCB, LEDs, and heat sink (4/23/14, in person)

  • Sarcon and Fuji Putty, compliant (4/23/14, in person)

  • Small fan above PCB, made by Sunon (4/23/14, in person)

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

• • NA

Risks and Areas of Concern

• • Need to finalize temperature control design and start building

  • Need to finalize heatsink design and start building

  • PCB design

Resources or Information Required but not Available

• • NA

Schedule

• • Finalize PCB design

  • Get Matlab code to work

  • Update Gantt chart.

Budget (list amount spent and amount remaining)

• • $231.48 spent, $2768.52 remaining

Progress on Report and Webpage

• • Finished Week 5 Progress Report

  • Working on completing the first draft of the report by Friday