MEP EP#105: Community Dice

Podcast Notes

• Stephen
  • Community Dice
    • Matt Parker – Standup Maths
    • Thingiverse
    • Shapeways
  • What’s the highest frequency signal a home gamer can generate? (square and sin waves?)
• Parker
  • New Engineering Article
    • 3 Steps to Planning Parts Selection for Your Next Electronic Hardware Product
  • Raspberry Pi Compute Module Motherboard
    • Continuation from the Compute Module board from last year
    • Added the PCM5122 audio DAC
    • Learning about USB HUB design
      • TUSB2046B
      • TPS2044 for overcurrent protection
        • Only rated for 500mA
      • USB spec says only 120uF cap per hub required but 100uF per port is recommended with low ESR
      • USB DM/DP signals require around 227-ohmtermination resistors
      • Optional filter of 22pF recommended for EMI suppression
      • This creates a “low pass” filter with a cut off of 267.9 MHz
        • 12M bit/sec full Speed USB 12MHz, well under this cut off
• Rapid Fire Opinion (R.F.O.)
  • Mouser now Authorized Distributor for Espressif
    • They make the ESP8266 Wifi stuff
  • FPGA Dev boards
    • Arrows $30 FPGA Board
      • Altera MAX 10
      • Built in USB programming
    • TinyFPGA Lattice
      • $12  but requires a $9 programmer

• MacroFab is Hiring!
  • Apply here

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