EP#150: Connector Confusion

EP#150: Connector Confusion

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

Jaksot(448)

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