Wrong variants

Circuit Break Podcast #71

Wrong Variants

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We delve into the fascinating world of time modulation, discussing recent advancements in capacitor technology.

Holy Static Hazard Batman!

Parker and Stephen discuss a recent article exploring how electrostatic discharge damage isn’t the only kind of static hazard digital designs can face.

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Tour MacroFab's ITAR-Compliant Facility

June 9, 2017, Episode #71

Stephen gets his Synth's envelope working and Parker starts looking into Class D Amplifiers.
  • Derrick from The Current Source sent in his stomp box as some “reverse” swag.
    • Recommend putting an LED in the Bass’ eyeball for power notification.
  • Parker
    • Finished and ordered the Raspberry Pi Compute Module LVDS test board.
    • Started researching more about I2S Audio.
  • Stephen
    • Synthesizer Update
      • Got the envelope working.
      • Envelope controls the volume and signal amplitude.
      • There was a hardware bug in that the envelope turned on before the frequency changed to the next note.
        • Stephen fixed it in software by adding a small 10ms delay before opening the envelope.
  • Pick Of the Week (POW)
    • Kinda unusual this week but DRAGONLOCK
      • 3D printer files for dungeons and stuff.
    • MonoPrice is having a sale on 3D printers.
  • Rapid Fire Opinion (RFO)
    • Heads up – WS2812B NeoPixels are about to change! – By Particle.io
      • 1. “RGB port refresh rate increased from 400Hz to 2000Hz, there’s LOW Frame Frequency and No Flicker appear in HD Video Camera, it improves excellent Large-Screen display effect.”
      • 2. “RGB port current-output reduced from 17.5mA to 16.5mA, it can’t be recognized by naked eyes and won’t affect the mixed OLDs & NEWs. However, it’s recommended to separate these old & new chips if your demand performance-critical.”
      • 3. “Old & New chips go all the way in PINs, application circuits, operating voltage, and PCB drawings, and the software is also fully compatible.”
      • 4. “Old & New chips are exactly the same as in Timing, Data transmission and Data structure. However, the Reset Time increased from >50us to >280us. It won’t cause wrong reset while interruption, and what’s more, it supports the lower frequency and inexpensive MCU. When the “Reset Time<280us”, don’t mixed up and kindly please make necessary amends.”
    • Samsung to recycle millions of recalled Galaxy Note 7 phones – Electronics Weekly
      • 4 million phones have been recalled.
      • All salvageable components, such as semiconductors and camera modules, shall be detached for test sample production purposes.
      • Samsung also plans to join the EU’s R&D and test efforts to develop new eco-friendly processing methods.
    • IBM unveils world’s first 5nm chip – Ars Technica
      • notable for being one of the first to use horizontal gate-all-around (GAA) transistors, and the first real use of extreme ultraviolet (EUV) lithography.
      • 2D, 3D, and back to 2D
        • First transistors where 2D
        • FinFETs where dev and where 3D
        • GAAFETS are FinFETs set sideways
        • fin is now a silicon nanowire
        • GAAFETs may go all the way down to 3nm, especially when combined with EUV. No one really knows what comes after 3nm.

Are you interested in seeing a blog series for the synth we’re working on? [Let us know!](mailto: podcast@macrofab.com)

Figure 1: Derrik’s BASS ACKWARDS stompbox he sent in!

Figure 1: Derrik’s BASS ACKWARDS stompbox he sent in!

Figure 2: Parker’s Layout for the Raspberry Pi 3 Compute Module LVDS test board.

Figure 2: Parker’s Layout for the Raspberry Pi 3 Compute Module LVDS test board.

Figure 3: Timing diagram and measured waveform of Stephen’s Synth envelope problem.

Figure 3: Timing diagram and measured waveform of Stephen’s Synth envelope problem.

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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