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escape_gallery_obsidian_vault/Notes/Electronics/Raspberry Pi GPIO Expanders.md
John Lyon-Smith ecb462a16b vault backup: 2026-07-11 16:59:05
2026-07-11 16:59:05 -07:00

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Image.png

  • The MegaMUX project shows how to multiplex 5 GPIO lines into 32 read/write channels
  • You can order the PCB board from PCBWay

Raspberry-Pi-GPIO-Layout-Model-B-Plus-rotated-2700x900.png

Small Batch PCB Manufacturers

  • OSHPark
  • PCBWay
    • PCBWay Gerber Viewer
    • PCBWay 3D Model Viewer
    • How to order on PCBWay
  • CircuitMaker
  • 4PCB
  • Technotronix

PCB Design Software

  • List of PCB design software
  • KiCad
  • KiCad tutorial
  • Getting Started in KiCad
  • KiCad documentation
  • Top 15 Mistakes When Designing PCB
  • How to rename a KiCad project

Multiplexors

  • TI CD405xB CMOS Spec Sheet

Dupont Connectors

  • How to find Duport connectors on DigiKey

Ribbon Cables

  • Making flat ribbon cables at home
  • Ribbon cable types

References

  • Flat Ribbon Cables
  • AWG23-08/G-1/300 grey ribbon cable
  • Expand Raspberry Pi GPIOs with I2C Port Expander
  • 10 Best GPIO Extension Board For Raspberry Pi
  • Controlling 32 lights with the Raspberry Pi - Raspberry Pi Forums
  • rppal_mcp23s17 - Rust
  • GitHub - quartiq/mcp230xx: MCP23017/MCP23008 a 16-Bit/8-Bit I2C I/O Expander with I2C Interface
  • Using GPIO Expander MCP23017 With Arduino (Get up to 128 GPIOs)
  • How to use the MCP23017 Port Expander with the Raspberry Pi | The Pi Hut
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