MEP EP #169: Is "I'm an Engineer" a valid defense?

Is "I'm an Engineer" a valid defense?

Parker

• PinoTaur Update
  
  
  
  • 12V master voltage input
  
  
  • Switching psus for the voltage rails
  
  
  • ATSAMD21G18A Breakout Board
    
    
    
    • 32.768KHZ is the external crystal?
    
    
    
    
  
  
  
  


• Lead free Smart LEDS?!
  
  
  
  • Direct from APA Electronic
  
  
  • APA-102C-5050 256
  
  
  • APA-104-260-5050
  
  
  
  

Stephen

• Macroamp Update
  
  
  
  • Tested preamp board
    
    
    
    • ~42x gain which is much too high
    
    
    • Power supply resistance is way too high at 2k
      
      
      
      • Did not account for extra current draw from buffer Jfets
      
      
      
      
    
    
    • J111 Jfet was bad out of the box - Have replaced with a BJT
    
    
    • So far very low noise
    
    
    • Riaa input filter still to be tested however it all works
    
    
    
    
  
  
  
  


• Tested Shielded cable footprint from MEP EP 155: Void Copper Donuts
  
  
  
  • Was a Success!
  
  
  
  

R.F.O.

• Hack my House: UL Certification and Turning the lights on with an ESP8266
  
  
  
  • What is the legality of IOT and connecting them to Mains?
  
  
  
  


• Component Shelf Life: How To Use All That Old Junk
  
  
  
  • How to know when your parts are bad?
  
  
  • How old is too old?
  
  
  • Surplus Stores
  
  
  
  


• EU bans lead solder for real this time
  
  
  
  • Lead has been newly classified by the EU as toxic to reproduction as of March 201
  
  
  • This means it can no longer be sold to the general public, only to commercial users
  
  
  • The transitional period ended Feb 28, 2019
  
  
  
  

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