Chime Module, Detonator Prop, electronics podcast, EQ Build, LAN9514, MacroFab, macrofab engineering podcast, MP62551, NCP3091, Prop Dev Stick, RPI3 CM, Star Wars, TPS2054B, TPS2113, Wagon, Wiliot
Podcast
155

MEP EP #155: Void Copper Donuts

Podcast Notes

  • Parker
    • Wagon Chime Module Repaired
    • StarWars Detonator Prop
    • RPI3 CM Motherboard USB Hub Saga
      • LAN9514
        • Page 14/15 of the datasheet
        • PRTCTL or Port Control
        • Single I/O that operates as a input and output
        • It operates as an open drain with an internal pullup
        • When the USB Power Switch senses an overcurrent it needs to drives the PRTCTL pin low
        • Then the LAN9514 also drives the pin low
        • This PRTCTL needs to operate the enable pin on the USB Power Switch
      • MP62551 or TPS2054B
        • Would need 4 MP62551 but I can provide 2A total verse 500mA
        • Operates the way the PRTCTL needs
        • Possibly breaking this HUB circuit into its own to prototype?
    • Improving the Prop Dev Stick
      • Changing to QFN from QFP Prop
      • 0402 parts instead of 0603
      • USB Type C for USB 2.0
      • Changing the power handling?
        • Original part is TPS2113
        • Only handles 5.5V MAX
        • NCP3901 is a Dual input Mux
          • Handles more power then I need but no built in current limiting
        • Maybe MPS has a good standalone current limiter?
  • Stephen
    • Beginning the eq build. There is a lot to do so it is taking a bit of time
    • Gold fingers and connectors – They work!
    • Trying a special coax connection – Different rings on top and bottom
  • R.F.O.

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Atari 2600 Junior with the combo 6507, RIOT, and TIA chip.

Atari 2600 Junior with the combo 6507, RIOT, and TIA chip.

 

Pinning out the Atari JAN chip by probing the PCB with the scope and multimeter. This is the LUMA signal for the video.

Pinning out the Atari JAN chip by probing the PCB with the scope and multimeter. This is the LUMA signal for the video.

 

Stephen's copper coax donut footprint.

Stephen’s copper coax donut footprint.


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