156B Week 1

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

• Fabrication

  • • Built four coil array on acrylic test bed

• Testing

  • • Tested functionality of 4 coil array - Successful

• Accomplishments from Previous Week

  • • Manufactured more coils

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

• • Connect H-bridge to coil array for negative voltage to allow for 360 degree stir bar rotation - Jordan, Edward

  • Print extra bobbins - Edward

  • Use COMSOL simulation to optimize B/wire volume and B/bobbin thickness - Nick

  • Order and begin using Raspberry Pi - Edward, Siddarth, Chris

  • Finish individual component analysis, report to each other of our findings - All

  • Purchase many components, tools, and pieces - Edward and Chris

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

03/23/17 - In person

• • Optimize for functionality, not cost

    • Buying higher quality materials

    • Taking more expensive strategies into account

  • 37 degrees C is maximum allowable temperature

    • Moving forward with thicker wire to reduce coil temperatures

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

03/21/17 - In person

• • Move forward with COMSOL analysis of electromagnetic coils

    • COMSOL being used to optimize magnetic field

  • Using a motor with a permanent magnet to spin the stirrer rod

    • A motor is too big, will not meet the size requirements

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

• • None

Risks and Areas of Concern

• • Can the Raspberry Pi with H bridge control the whole system by itself, or do we need further controllers?

  • We may find that the coils aren't strong enough to move the magnetic stirring rod at the full speed.

Resources or Information Required but not Available

• • How to translate our Raspberry Pi code to a controller on a PCB

  • How to accurately calculate the strength of a multi-layer electromagnetic coil

Schedule

• • Individual component analysis - 04/07/2017

  • Design Presentation - 04/10/2017

Budget (list amount spent and amount remaining)

• • $9.69 spent

  • $4981.55 remaining

Progress on Report and Webpage

• • Webpage was redesigned, information added. 

  • Report shall be started soon.