commit 9ed5524de563043af30063b9a125d68e4cf81aa1 · dunkirk.sh/pxlboard

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README.md
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       Nothing yet

     

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       ## Pinout & Wiring Diagram

     

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       ### XIAO RP2040 Connections

     

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       | XIAO Pin | Connected To | Description |

     

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       | --- | --- | --- |

     

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       | D0/GPIO26/A0 | - | Unused |

     

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       | D1/GPIO27/A1 | - | Unused |

     

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       | D2/GPIO28/A2 | - | Unused |

     

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       | D3/GPIO29/A3 | - | Unused |

     

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       | D4/GPIO6/SDA | LIS3DHTR SDA | I2C Data Line |

     

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       | D5/GPIO7/SCL | LIS3DHTR SCL | I2C Clock Line |

     

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       | D6/GPIO0/TX | - | Unused |

     

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       | D7/GPIO1/RX | NEOPIXEL_SIG | LED Data In |

     

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       | D8/GPIO2/SCK | - | Unused |

     

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       | D9/GPIO4/MISO | - | Unused |

     

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       | D10/GPIO3/MOSI | - | Unused |

     

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       | 3V3 | LIS3DHTR VDD_IO | 3.3V Power |

     

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       | GND | LIS3DHTR GND, LEDs GND | Ground |

     

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       | 5V | LEDs VDD | 5V Power |

     

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       ### LIS3DHTR Accelerometer

     

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       | LIS3DHTR Pin | Connected To | Description |

     

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       | --- | --- | --- |

     

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       | VDD | 3.3V | Power Supply |

     

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       | VDD_IO | 3.3V | Interface Power |

     

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       | GND | GND | Ground |

     

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       | SDA | XIAO D4 | I2C Data |

     

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       | SCL | XIAO D5 | I2C Clock |

     

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       | INT1 | - | Interrupt (not used) |

     

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       | INT2 | - | Interrupt (not used) |

     

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       ### Wiring Diagram

     

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       ```mermaid

     

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       graph TD

     

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           XIAO[XIAO RP2040] -- SDA --> LIS3D[LIS3DHTR Accelerometer]

     

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           XIAO -- SCL --> LIS3D

     

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           XIAO -- 3.3V --> LIS3D

     

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           XIAO -- GND --> LIS3D

     

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           XIAO -- 5V --> LEDS[SK6812 LED Grid]

     

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           XIAO -- GND --> LEDS

     

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           XIAO -- D7/GPIO1 --> LEDS

     

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           LEDS -- Data chain --> LED1[LED #1]

     

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           LED1 --> LED2[LED #2]

     

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           LED2 --> LED3[LED #3]

     

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           LED3 --> DOT["..."]

     

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           DOT --> LED64[LED #64]

     

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           classDef mcu fill:#f96,stroke:#333,stroke-width:2px;

     

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           classDef sensor fill:#bbf,stroke:#33f,stroke-width:1px;

     

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           classDef led fill:#9f9,stroke:#3a3,stroke-width:1px;

     

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           class XIAO mcu;

     

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           class LIS3D sensor;

     

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           class LEDS,LED1,LED2,LED3,LED64 led;

     

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       ```

     

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       ### Capacitor Placement

     

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       - 100nF ceramic capacitor between VDD and GND of LIS3DHTR

     

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       - 10nF ceramic capacitors for each SK6812 LED (placed close to power pins)

     

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       <p align="center">

     

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       	<img src="https://raw.githubusercontent.com/taciturnaxolotl/carriage/master/.github/images/line-break.svg" />

     

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       </p>