MEP EP #170: Start Getting Crusty

MEP EP #170: Start Getting Crusty

Parker

• PinoTaur
  
  
  
  • MCP23S08
  
  
  • I/O Expanders Verse Shift Registers?
  
  
  
  


• Wagon Tach Project
  
  
  
  • 3D printed the housing
  
  
  • Need to run the wire from the distributor to inside the cab
  
  
  • To knock down the distributor signal
    
    
    
    • In series diode to prevent negative flyback? voltage from affecting circuit
    
    
    • Resistor divider
    
    
    • Zener diode to clamp to 4.7V
    
    
    • H11L1M - Schmitt Trigger Opto
    
    
    
    
  
  
  
  

Stephen

• MacroAmp Testing
  
  
  
  • Used a variac to bring the amp up to voltage
  
  
  • Found some of the resistances were too high
    
    
    
    • It can be difficult to determine what a transformer tap will produce - I chose to guesstimate and fix it later...it works
    
    
    
    
  
  
  • Higher gain when powered from the transformer. About 100x gain
  
  
  • Tested into a Power amp - Works
  
  
  • HUGE ISSUE: MICROPHONIC TUBES
  
  
  • Next steps - Get everything in the enclosure. Wire the output transformers
  
  
  
  

R.F.O.

• Chip component gets heat out of tight spots without leaking electrons
  
  
  
  • TT Electronics has introduced a surface-mount component designed exclusively to get heat out of tight spots.
  
  
  • SMD thermal junctions that can be placed with a pick and place
  
  
  • Can use creative thermal paths instead of more traditional “heat planes”
  
  
  
  


• Server maker Super Micro to ditch 'made-in-China' parts on spy fears
  
  
  
  • Check out Episode 142 of the MEP with Misha and Church
  
  
  • This a security move or just money due to tariffs?
  
  
  • Was there something TO the Bloomberg article that caused this to happen behind the scenes?
  
  
  
  


• On better datasheets
  
  
  
  • Suggested alternate reading: https://www.embeddedrelated.com/showarticle/809.php
  
  
  • Manufacturers could provide a “legend” or “guide” for their family of datasheets
  
  
  • Don't just photocopy your old datasheet and slap your name on top. Do just a little bit of effort and make a new datasheet. Also if you do photocopy anything AT LEAST DO IT STRAIGHT.
  
  
  
  

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