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PRINTED CIRCUIT BOARD DESIGN

Root Ai | November 2019 - January 2020

PURPOSE

  • I had been assisting my co-workers with much of the electrical cabinet wiring and integration before this point and was looking for the chance to be more involved with the robots electrical system.

  • This PCBs purpose is as a general purpose communication board, offloading computer power from our main CPU through a CAN connection.

  • Part of this projects purpose was also allowing me to learn AutoDesk EAGLE and gain a much deeper understanding of Electrical Engineering.

CHALLENGES

  • Independently learning ECAD software, EAGLE, from part generation to Gerber exporting and submitting designs to manufacturers

  • Had to learn shortcuts and advanced functions such as multi-wire routing, part grouping, and prefixing footprints

  • Learning to navigate electrical part websites to find useful and relevant parts

  • Took a deep dive into many different data sheets to learn more about the chosen parts and how to properly design around their requirements

  • Learning how to do trace width calculations for a given power draw

  • Refreshing myself on what the different types of schematic symbols meant, especially for more nuanced things like transistors and switches

  • Figuring out what some of the different routing techniques were to make wire routing easier and cleaner

  • Moving components around and re-running traces to account for labeling the different components for assembly and usability

  • Ensuring that designs met the manufacturers specifications and generating the relevant information needed to produce the PCB

 

RESULTS

  • This PCB has been fully validated and integrated into a complete robotic subsystem (see video)

  • I found some unused real estate on the board and was able to add a few sketches on the silkscreen layer

  • Final design included communication through CAN, I2C, SPI, ADC, FTDI, Optocoupled inputs/outputs, and GPIO

  • This PCB is getting integrated into the rest of the platform to perform a variety of functions.

  • This design went through 2 different review stages allowing me to run a meeting and solicit feedback to improve design 

 

SKILLS DEMONSTRATED

  • Highlights my ability to learn on that job and then apply it to the task at hand

  • Electrical engineering ability in circuit design, digital i/o, and EAGLE

  • Able to work with experienced engineers to quickly solve problems as they arise and solicit feedback in designs

  • I am a self-starter that not only does work asked of me but can see what work needs to get done

  • Able to finish a project from initial requirements to validation and integration.

 

Contact

(302) 438 -1480

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