MEP EP#275: Log Stepping Revision Control

MEP EP#275: Log Stepping Revision Control

• Log stepper
  
  
  
  • Exercise in madness
  
  
  • 24 position stepped attenuator
  
  
  • 1db steps with step 0 being -infinite and step 24 being 0db attenuation
  
  
  • Requires lots of non standard resistor values
  
  
  • Constant total resistance
  
  
  • Excel sheet
  
  
  • Make before break operation
  
  
  
  


• Revision workflow
  
  
  
  • How do you document and handle revisions for schematics and pcbs?
  
  
  • Process
    
    
    • Get new rev
    
    
    • Go to testing
    
    
    • Find issues and document
    
    
    • Make new revision
    
    
    • Repeat
    
    
    
    
  
  
  
  


• Venturing into hobby level SLA printing
  
  
  
  • Elegoo Mars 2
    
    
    • Quality is amazing
    
    
    • Print speed is interesting
    
    
    • Will have to experiment with different resins to find a high strength, high temperature
    
    
    • Plating process to test
    
    
    
    
  
  
  
  


• Amplifier update
  
  
  
  • Live next week on parts replacement?
  
  
  • Recovering it