MEP EP#110: Dangling Transformers

Podcast Notes

Stephen
- Ribbon Microphone
  - Turn it into a Hackaday.io project?
  - Make a USB microphone from scratch?
    - PCM2912A
    - Talked about this IC on a previous episode of the MEP
    - Datasheet
- Stephen will be in Denver next week
  - Contact Info
Parker
- Test results of the PCM5122 Audio DACs
  - Covered in a previous episode of the MEP
  - Ceramic caps sound better?
    - Sound is subjective
- PinHeck REV8 Update
  - PCM5122
  - Running I2C and I2S on the Raspberry Pi Compute Module
    - Have to run them on alternate pins
  - Looking into the source code for the dtoverlays to figure out how to pass the correct overrides
    - dtoverlay=i2c1-bcm2708,sda1_pin=44,scl1_pin=45,pin_func=6
    - dtoverlay=i2s-gpio28-31
  - REV8 will be used as a test mule for PinoTaur
RFO
- Shortage of Passive Parts
  - Hackaday article
  - MacroFab article
- Juicero already found at a Goodwill Store
  - Selling for $40 verse the original price of $700
- Why is the boardhouse putting on a UL mark on my PCB?
  - The mark means UL recognized which means that it is a component that can be used as a part of UL listed produt

Visit our Slack Channel and join the conversation in between episodes and please review us, wherever you listen (PodcastAddict, iTunes). It helps this show stay visible and helps new listeners find us.

Data’s utility device from the Goonies.

Stephen’s ribbon microphone with transformer. Featured is Stephen’s patented “Invis-o-Connector”.

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

About The Hosts

Parker Dillmann is MacroFab's Co-Founder, and Lead ECE with backgrounds in Embedded System Design, and Digital Signal Processing. He got his start in 2005 by hacking Nintendo consoles into portable gaming units. He also runs the blog, longhornengineer.com, where he posts his personal projects, technical guides, and appnotes about board layout design and components. Parker graduated with a BS in Electrical and Computer Engineering from the University of Texas.

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.