MEP EP#299: Operation Scope Creep

MEP EP#299: Operation Scope Creep

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
  • Comprehensive Power Supply System Designs for Harsh Automotive Environments
  • LT8672
  • LT8614
• 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