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Chonky motherboards

MacroFab Engineering Podcast #232

Chonky Motherboards

Related Topics
Current Conscience Comparator

How low can the power consumption of the Cat Feeder Unreminder go? Parker and Stephen discuss leakage current on this episode of the podcast!

Color Clashing Chip Consolidation

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July 8, 2020, Episode #232

Parker discusses his latest project. An electronic device to ensure his pet cat does not become a chonker. A lawd its processing!

Parker

  • The Cat Feeder Unreminder
    • Different implementations to accomplish the goal

Stephen

  • Synth DSP replacement
    • Korg MS2000
    • Was pulling an additional 500mA on the power supply
    • Found a blown surface mount fuse
    • The DSP chip XCB56362PV100 was hot to touch
      • Replaced with part found on ebay
      • Wasn’t sure if this part needed programming
  • LED Matrix Driver – IS31FL3741
    • 39×9 LED matrix = 351 individual color leds or 117 RGBs
    • QFN-24 package
    • 256 levels of PWM control and 256 levels of DC current control
    • Layout vs code

R.F.O.

  • Brew Day Updates!
The “motherboard” of the synth Stephen repaired. From a Korg MS2000.

The “motherboard” of the synth Stephen repaired. From a Korg MS2000.

Cat Chonker classification chart.

Cat Chonker classification chart.

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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