High Voltage Gyrators and KiCad Plugins

November 20, 2019 Hosted by Parker Dillmann, Stephen Kraig

Stephen and Parker discuss Equalizers for High Voltage signal paths and ultra rare Atari 2600 Hardware. Also, what is the Apple H1 Chip?

Parker

  • 50V power pack update
    • Managed to safely remove the cells
    • Protection circuit is functioning correctly
    • One of the 4 banks is “bad”
    • Scrapping all the 18650’s for future projects
  • Helping Ben debug the Atari Junior 2600 Single Chip system
    • Atari 2600’s typically have 3 main ICs
      • 6507 CPU
      • RIOT (RAM and I/O)
      • TIA (Graphics and Sound)
  • Air Raid Siren all printed
    • Needs final fitment and assembly to be completed!

Stephen

  • Rackmount case
    • Designed a rackmount case for a 1u preamp
    • New v-score bend method that works great on aluminum
    • A mixture of chamfer and cut relief
    • Can be bent by hand
  • Back to Gyrators
    • 300V 4 band EQ using high voltage Mosfets as gyrators
    • Gyrators first mentioned on Episode 173 of the MEP
    • Wanted to solve the issue of not having to make more power supply rails
    • About +/- 12is db per band
    • 80hz, 220hz, 750hz and 2k

R.F.O.

  • KiCad Action Plugins
    • Run your KiCadPython scripts direct inside the UI now!
    • RF tools – a very cool curved trace plugin
    • Parker’s major complaint about Zoom Centering in KiCad hasn’t been an issue for at least 2 years now
      • Why did no one tell Parker 🙁
  • EE Web – now with more TOOLS!
    • All about Arrow
    • More EDA tools than you can shake a stick at!
  • Apple H1 Chip?
    • Silly marketing wank
    • It’s just a custom MCU

Hosts: Parker Dillmann, Stephen Kraig

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