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Turning it on new design checklists with james lewis

MacroFab Engineering Podcast #222

Turning It On – New Design Checklists with James Lewis

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April 29, 2020, Episode #222

James Lewis is back to discuss testing and validating your new PCB Assembly design and what to look for in electronic lab equipment.

James Lewis

How to test and validate if your new PCB Assembly is working properly
  • What do you do before power on?
    • Component checks?
    • Current limiting?
    • Voltage limiting?
  • The Smoke Test
    • What do you do if it all goes up in smoke?
  • Validating power systems or supplies
  • Equipment for testing
  • IR cameras for looking for hot spots
  • Minimal viable electronic lab equipment
    • Digital Multimeter
      • auto ranging
      • true RMS
      • measure/verify caps (but gotta take it out of circuit)
      • Consider bench style
    • Power Supply
      • Power output, watch the power ratings
      • Current limiting (critical)
      • Output control
      • Avoid the cheap ATX route
    • Oscilloscope bandwidth vs sample rate
      • channel count
      • built-in AWG
      • serial decodes
      • Probes
    • Function Generator
      • Great for filters and to replace a clock, but how useful are they?
    • All-In One devices
      • Analog Discovery 2
      • Great for turning-on boards from home
      • Compromised specs, but could be “good enough.”
    • Soldering Station
      • Think about rework
      • Can you remove SMT?
      • Hot air, etc.
      • Will you need to add debug headers?
James Lewis creator of the Baldengineer Blog and the AddOhms video tutorial series

James Lewis creator of the Baldengineer Blog and the AddOhms video tutorial series

About the Hosts

Parker Dillmann
  Parker Dillmann

Parker is an Electrical Engineer with backgrounds in Embedded System Design and Digital Signal Processing. He got his start in 2005 by hacking Nintendo consoles into portable gaming units. The following year he designed and produced an Atari 2600 video mod to allow the Atari to display a crisp, RF fuzz free picture on newer TVs. Over a thousand Atari video mods where produced by Parker from 2006 to 2011 and the mod is still made by other enthusiasts in the Atari community.

In 2006, Parker enrolled at The University of Texas at Austin as a Petroleum Engineer. After realizing electronics was his passion he switched majors in 2007 to Electrical and Computer Engineering. Following his previous background in making the Atari 2600 video mod, Parker decided to take more board layout classes and circuit design classes. Other areas of study include robotics, microcontroller theory and design, FPGA development with VHDL and Verilog, and image and signal processing with DSPs. In 2010, Parker won a Ti sponsored Launchpad programming and design contest that was held by the IEEE CS chapter at the University. Parker graduated with a BS in Electrical and Computer Engineering in the Spring of 2012.

In the Summer of 2012, Parker was hired on as an Electrical Engineer at Dynamic Perception to design and prototype new electronic products. Here, Parker learned about full product development cycles and honed his board layout skills. Seeing the difficulties in managing operations and FCC/CE compliance testing, Parker thought there had to be a better way for small electronic companies to get their product out in customer's hands.

Parker also runs the blog, longhornengineer.com, where he posts his personal projects, technical guides, and appnotes about board layout design and components.

Stephen Kraig
  Stephen Kraig

Stephen Kraig began his electronics career by building musical oriented circuits in 2003. Stephen is an avid guitar player and, in his down time, manufactures audio electronics including guitar amplifiers, pedals, and pro audio gear. Stephen graduated with a BS in Electrical Engineering from Texas A&M University.

Special thanks to whixr over at Tymkrs for the intro and outro!

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