# Willowy Ivory Gadget Copter ## Description Welcome to your new project. Imagine what you can build here. ## Project Details - **Owner:** 1mm - **Created:** 1/30/2026 - **Last Updated:** 1/30/2026 - **Visibility:** Public - **System Architecture:** ```mermaid flowchart TD subgraph Power [Power] BAT["LiPo Battery"] --> SW["Slide Switch"] SW --> VBAT_SW["VBAT_SW"] VBAT_SW --> MCU["XIAO nRF52840 Module"] VBAT_SW --> IMU["IMU I2C"] VBAT_SW --> GNSS["GNSS I2C"] VBAT_SW --> SD["microSD Socket"] VBAT_SW --> DIV["Battery Divider to A0"] end subgraph I2C [I2C Bus] MCU -->|SDA D4| SDA["SDA"] MCU -->|SCL D5| SCL["SCL"] SDA --> IMU SCL --> IMU SDA --> GNSS SCL --> GNSS SDA --> PU1["4.7k Pullup"] SCL --> PU2["4.7k Pullup"] PU1 --> V33["3.3V"] PU2 --> V33 end subgraph SPI [SPI Bus] MCU -->|CS D10| CS["SD_CS"] MCU -->|SCK D9| SCK["SD_SCK"] MCU -->|MOSI D8| MOSI["SD_MOSI"] MCU -->|MISO D3| MISO["SD_MISO"] CS --> SD SCK --> SD MOSI --> SD MISO --> SD end subgraph Decoupling [Decoupling] V33 --> C_IMU["10uF Decap IMU"] V33 --> C_GNSS["10uF Decap GNSS"] C_IMU --> GND["GND"] C_GNSS --> GND end DIV -->|A0| MCU V33 --> MCU GND --> MCU GND --> IMU GND --> GNSS GND --> SD ``` ## Key Components ### GPS1 — [TESEO-LIV3F](https://www.flux.ai/mvniekerk/teseo-liv3f.md) - Datasheet URL: https://www.st.com/resource/en/datasheet/teseo-liv3f.pdf - Role: GNSS - Package or Case Code: 18-LCC - Part Type: Integrated Circuit - Package: Module - Manufacturer Part Number: TESEO-LIV3F - Voltage: 2.3V - Role Details: I2C GNSS module for position; powered from 3.3V and decoupled with 10uF. - Manufacturer Name: STMicroelectronics - Max Input Voltage: 4.2V **Pins:** - 1PPS [pin 4] - ANT_OFF [pin 13] - GND [pin 1] - GND_RF_1 [pin 10] - GND_RF_2 [pin 12] - RESERVED_1 [pin 15] - RESERVED_2 [pin 18] - RF_IN [pin 11] - RX [pin 3] - SCL [pin 17] - SDA [pin 16] - SYS_RSTN [pin 9] - TX [pin 2] - VBATT [pin 6] - VCC [pin 8] - VCC_IO [pin 7] - VCC_RF [pin 14] - WAKE-UP [pin 5] ### J1 — [PHR-2](https://www.flux.ai/adrian95/phr-2.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role: Battery Connector - Package: JST-PH-2 Housing - Manufacturer Name: JST Sales America Inc. - Role Details: 2-pin LiPo battery connector (to VBAT and GND). - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Manufacturer Part Number: PHR-2 **Pins:** - P1 [pin 1] - P2 [pin 2] ### S1 — [450404015514](https://www.flux.ai/adrian95/450404015514.md) - Package: SMD Slide Switch - Role: Power Switch - Role Details: Main power switch between battery and VBAT_SW power rail. - Part Type: Switch - Datasheet URL: https://www.we-online.com/components/products/datasheet/450404015514.pdf - Manufacturer Name: Würth Elektronik - Manufacturer Part Number: 450404015514 - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - MP1 [pin MP1] - MP2 [pin MP2] - MP3 [pin MP3] - MP4 [pin MP4] ### U1 — [Seeed Studio XIAO nRF52840](https://www.flux.ai/seeedstudio/seeed-studio-xiao-nrf52840.md) - Package: Module - Role: MCU - Purchase Url: https://www.seeedstudio.com/Seeed-XIAO-BLE-nRF52840-p-5201.html - Part Type: Microcontroller - Datasheet URL: https://files.seeedstudio.com/wiki/XIAO-BLE/nRF52840_PS_v1.5.pdf - Role Details: Main controller module; provides I2C on D4/D5, SPI to microSD, ADC A0 for battery monitor. - Manufacturer Name: Seeed Studio - Manufacturer Part Number: 102010448 **Pins:** - 3V3 [pin 12] - 5V [pin 14] - BAT- [pin 16] - BAT+ [pin 15] - CLK [pin 20] - D10_MOSI_P1.15 [pin 11] - D7_RX_P1.12 [pin 8] - D8_SCK_P1.13 [pin 9] - D9_MISO_P1.14 [pin 10] - DIO [pin 19] - GND [pin 13] - GND [pin 22] - NFC 1 [pin 18] - NFC 2 [pin 17] - P0.02_A0_D0 [pin 1] - P0.03_A1_D1 [pin 2] - P0.04_SDA_A4_D4 [pin 5] - P0.05_SCL_A5_D5 [pin 6] - P0.28_A2_D2 [pin 3] - P0.29_A3_D3 [pin 4] - P1.11_TX_D6 [pin 7] - RST [pin 21] ### U3 — [ST-TF-003A](https://www.flux.ai/adrian95/st-tf-003a.md) - Datasheet URL: https://www.snapeda.com/parts/ST-TF-003A/Suntech/view-part/?ref=search&t=micro%20sd%20socket - Package: microSD Socket - Manufacturer Name: Suntech - Role Details: microSD card socket interfaced over SPI (CS D10, SCK D9, MOSI D8, MISO D3). - Part Type: Connector - Role: Storage - Manufacturer Part Number: ST-TF-003A - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - CD [pin G2] - CD2 [pin G3] - CS [pin 2] - DI [pin 3] - DO [pin 7] - GND [pin G4] - GND [pin G1] - GND [pin 6] - NC [pin 1] - RSV [pin 8] - SCK [pin 5] - SHIELD [pin 9] - VCC [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/1mm/willowy-ivory-gadget-copter](https://www.flux.ai/1mm/willowy-ivory-gadget-copter).* --- *Generated from [https://www.flux.ai/1mm/willowy-ivory-gadget-copter](https://www.flux.ai/1mm/willowy-ivory-gadget-copter)*