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MEP EP#299: Operation Scope Creep

Podcast Notes

8 Layer Design

    • Stephen is working on a 12 pcb design
      • 11 pcbs done 1 left
      • 6 nets left to go out of 963
    • How to attack an 8 layer design?
      • Part placement
      • Stackup prep

Multi Gauge Progress / Prop_Fan

  • Screen and navigation
    • CFA635-TFK-KL
  • Temperature
    • LTC2983
      • Thermistors¬†
      • 5V analog active sensors
  • Level shifter
    • TXB0104DR
    • Shift between the 3.3V MCU and the 5V LTC2986
  • Power filtering
  • Air Quality
    • HPMA115C0-003
      • PM2.5 Particle Sensor
    • Sensirion SGP40
      • VOC Sensor
    • Sensirion SHTC3
      • Temp and Humidity
  • Last thing to finish on the design is to choose how to protect the inputs on the LTC2983
    • Demo boards only use in series 100 ohm resistors

Adventures in Plastic Injection Molding

  • Stephen got the mold state side
    • Second round of payment due
    • Remember Duty/tax
  • Did the first round of prototyping – looking to validate the mold with more precise control
    • Material story
      • Polyethylene
      • Polypropylene
      • Heat/Temperature/Pressure


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

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