Current conscience comparator

Circuit Break Podcast #360

Current Conscience Comparator

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January 6, 2023, Episode #360

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

Framework, Noctua, and other brands add official 3D models to Printables

  • Prusa Research’s “Printables” website added a new section called “Brands”
  • Manufacturers and OEMs can upload verified models for their products

CNC Update

  • All of the fasteners arrive this week along with the aluminum extrusions
  • Build weekend
  • Developed a 3d printable cable tie for 4040 t-slots
    • 3d prints with planned bending sections
    • Other than iteration and experience is there a way to design this?
    • Elastic deformation in the area that we want – avoid plastic deformation on stress-strain curve
  • Will be printing along with the spray system from episode 354

The Return of the Cat Feeder Unreminder

  • MAX9019 Comparator Oscillator
  • Low power design considerations
    • Consider every current path for leakage current
  • Super Capacitor Leakage Comparison
    • DSF505Q6R0JBG
      • 5F at 6VDC
      • 40uA leakage
    • HSL0814-3R8106-R
      • 10F at 3.8VDC 
      • 2.0-3.0uA leakage
  • Get the timer working 
    • LTC2956-1
    • 0.8uA
    • Use the enable output to switch between what segments are being driven on the TN LCD
  • DG419 signal switcher

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 is a component engineer working in the aerospace industry. He has applied his electrical engineering knowledge in a variety of contexts previously, including oil and gas, contract manufacturing, audio electronic repair, and synthesizer design. A graduate of Texas A&M, Stephen has lived his adult life in the Houston, TX, and Denver, CO, areas.

Stephen has never said no to a project. From building guitar amps (starting when he was 17) to designing and building his own CNC table to fine-tuning the mineral composition of the water he uses to brew beer, he thrives on testing, experimentation, and problem-solving. Tune into the podcast to learn more about the wacky stuff Stephen gets up to.

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

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