MEP EP#299: Operation Scope Creep

MEP EP#299: Operation Scope Creep

8 Layer Design

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  • 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