The normal chaos

Circuit Break Podcast #224

The Normal Chaos

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May 13, 2020, Episode #224

Stephen adventures into thermal testing of oscillators and analog circuits while Parker gets greasy with timing chains on the Wagon.

Stephen

  • DC Heating and Thermal Testing
    • A low voltage moderate current linear power supply
    • 12.6V dc @ 0.55A 6.93W
    • LM2940T-12.0 LDO
    • TIP42 bootstrap transistor to share the load
    • 12V @ 2A transformer supplies ~16.2vdc with 200mV ripple
    • ~2W of heat to be handled
    • Shooting for about 250mW in the regulator and the transistor then the rest will get dumped in some resistors
    • PCB heatsinking
  • Diptrace 4.0 is finally here!
    • Snapping and aligning items
    • Circles and arcs actually have a center now…
    • Paste and Mask layers are finally visible
    • Pad angles other than 0 and 90 are now available in the pattern editor
    • One button for removing silkscreen from pads
    • Progressive searching for components instead of the seizure it used to be
    • Export options now can export all the manufacturing files as a single zip
    • Teardrops!

Parker

  • Wagoneer Engine Work
    • Timing cover
      • Water pump
      • Timing chain
      • Distributor gear
      • Distributor camshaft gear
      • Harmonic Balancer
      • All the gaskets
    • Radiator next
    • Dash Cluster
  • Fixing a wine chiller
Refinished dash Parker restored and installed new gauges into.

Refinished dash Parker restored and installed new gauges into.

Gears are not supposed to be shiny and sharp! Cam distributor gear is all chewed up.

Gears are not supposed to be shiny and sharp! Cam distributor gear is all chewed up.

Oil seal surface on the harmonic balancer. Supposed to be flat…not dished and grooved.

Oil seal surface on the harmonic balancer. Supposed to be flat…not dished and grooved.

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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