APA Electronic, APA-102C-5050 256, APA-104-260-5050, Component Shelf Life, Copper Donuts, electronics podcast, ESP8266, EU bans lead solder, J111, MacroAmp, MacroFab, macrofab engineering podcast, PinoTaur, SLO, UL Certification
Podcast
169

MEP EP #169: Is “I’m an Engineer” a valid defense?

Podcast Notes

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.

Visit our Public Slack Channel and join the conversation in between episodes!


Schematic for the ATSAMD21G18A breakout board.

Schematic for the ATSAMD21G18A breakout board.

 

PCB layout for the ATSAMD21G18A breakout board. USB Type-C!

PCB layout for the ATSAMD21G18A breakout board. USB Type-C!

 

Stephen's copper donut for soldering COAX cable to PCBs.

Stephen’s copper donut for soldering COAX cable to PCBs.

 

Inside the amplifier Stephen rebuilt recently. Mike Ikes for resistors and capacitors!

Inside the amplifier Stephen rebuilt recently. Mike Ikes for resistors and capacitors!

 

Stephen's amplifier put together and working. Here Stephen is recording the output with a microphone.

Stephen’s amplifier put together and working. Here Stephen is recording the output with a microphone.


Special thanks to whixr over at Tymkrs for the intro and outro!