Description

Congratulations to our Slack member Mobius Striptease! Mobius’ pulse generator won first place at their Senior Design Expo!

Article written about MacroFab: Houston electronics manufacturing company gears up for growth. Talks about the growth of MacroFab over the past 2 years.

• Parker
  • RPI3 Compute Module
    • PCM5122 Routed
    • LAN9514 Routed
      • single upstream USB port on BCM2835
      • Pin 44 Ethernet 25MHz output
      • Pin 31 LAN RESET
      • Information found on the Raspberry pi forum
    • Need to add USB current limiting
    • CM3 HOME
      • Guido Ottaviani made his own carrier board I have been looking at for inspiration to solve some of the final problems
    • 1473149-4
      • Connector being used to socket the RPI3 Compute Module
• Stephen
  • Crazy EQ amplifier design continuation
    • Opted to go with a card edge solution for each EQ band
    • Each band connects via a 36 pin PCI-Express connector
      • +12V
      • -12V
      • +5v Reference
      • -5V reference
      • Gnd
      • 4 In Signals
      • Cut
      • Boost
      • Potentiometer pin 2
    • 21 modules in total. 1 module has all of the power and main signal in/out from the amp. This sends all of the other modules their power/ground and signals.
    • Need to rethink things - Feedback loops are crappy.. Need to go with a 64 pin solution
      • 20 ins and 20 outs
  • Beveled edges and Hard Gold plating discussion in a future episode
• R.F.O.
  • Debugging I²C with Hardware
    • I²CDriver is a crowdfunded effort by James Bowman
    • Open Source tool used to easily drive I2C devices
    • Controls with a GUI, command-line, C and C++ using a single source file, or Python 2 and 3, using a module
  • Low Cost Reverse Polarity and Over Current Protection
    • Jeri Ellsworth's new video on reverse bias protection
    • Has a Robbie Robot on her desk!
    • Methods
      • “One of the options is to do nothing”
      • Diode input
      • Exploding Diode
      • PMOS FET
        • Low rds on - “almost not there”
        • Body Diode - Watch out for this

Tags: 1473149-4, 20-Band, CM3 Home, electronics podcast, EQ, i2c, Jeri Ellsworth, LAN9514, MacroFab, macrofab engineering podcast, Mobius Striptease, PCM5122, Reverse Polarity, Reverse Polarity Protection