MacroFab Engineering Podcast EP 299

Operation Scope Creep

October 20, 2021 Hosted by Parker Dillmann, Stephen Kraig

Multi-layer PCB designs. As an engineer, how do you decide when it is time to increase layer count and how do you decide what goes on those layers?

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

Hosts: Parker Dillmann, Stephen Kraig

Credits

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

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