2 layers96.6 × 82.8 mm
2 layers103.7 × 88.1 mm
Starbie
notahuman404/AutoCADLearningStarbie is a small motion-controlled digital pet built around a Seeed Studio XIAO ESP32-C3. It draws a one-bit pet on a 128×64 OLED, uses an MPU6050 to read tilt and shaking, and offers a four-way action menu.
- Size
- 103.7 × 88.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 8
- Nets
- 38
- Pads
- 60
- Tracks, vias
- 27, 0
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 5 Oct 2026
- Updated
- 10 Oct 2026
Overview
Starbie is an open-source printed circuit board by notahuman404, from the notahuman404/AutoCADLearning repository on GitHub. It is a 2-layer board of 103.7 × 88.1 mm with 8 parts on 38 nets, routed with 27 tracks and 0 vias.
It is built around the DHT11. Its parts include 2 ICs, 2 connectors, 2 switches and 1 resistor. It belongs with the ESP32 and RISC-V boards of this library.
Main components
1README
README.mdStarbie
Starbie is a small motion-controlled digital pet built around a Seeed Studio XIAO ESP32-C3. It draws a one-bit pet on a 128×64 OLED, uses an MPU6050 to read tilt and shaking, and offers a four-way action menu. A DHT11 can provide temperature and humidity readings.
Project images
Concept render | 3D PCB render |
PCB layout | Schematic |
Features
- Animated pet with nap, play, feed, and pet actions.
- Tilt-controlled radial menu, using the MPU6050 as a simple air mouse.
- Shake reaction that wakes Starbie and changes its stats.
- Stats screen for joy, energy, fullness, and available sensor readings.
- Joy, energy, and fullness are saved using the ESP32 Preferences storage; stats do not drain while idle.
Hardware
| Part | Role |
|---|---|
| Seeed Studio XIAO ESP32-C3 | Controller and firmware target |
| 0.96-inch 128×64 I²C OLED, SSD1306-compatible | Pet display |
| MPU6050 module (external via J2) | Tilt and shake sensing |
| DHT11 | Optional temperature and humidity sensing |
| 2 Cherry MX-compatible 1U switches | Menu/action and stats controls |
| 10 kΩ through-hole resistor | Listed as R1 in the schematic |
| Custom PCB | KiCad design in the starbie directory |
See BOM.csv for the current parts list. The guide pairs the XIAO ESP32-C3 symbol with the custom footprint ID Imported Parts:XIAO-ESP32-C6-DIP; the BOM preserves that assignment. The guide represents the MPU6050 module with a generic 1x08 connector: J2 is the board-mounted header and pins 1-4 carry +3.3V, GND, SCL, and SDA. The guide does not specify a particular breakout-board variant, so the BOM names it as an MPU6050 module connected via J2.
Wiring
The firmware pin assignments are in Firmware/Starbie/Starbie.ino. OLED and MPU6050 share I²C.
| Device | XIAO connection | Notes |
|---|---|---|
| OLED SDA | D4 / GPIO6 | I²C address defaults to 0x3C |
| OLED SCL | D5 / GPIO7 | Shared I²C bus |
| MPU6050 SDA | D4 / GPIO6 | I²C address defaults to 0x68 |
| MPU6050 SCL | D5 / GPIO7 | Shared I²C bus |
| DHT11 data | D1 / GPIO3 | Optional; set USE_DHT11 to false if not fitted |
| Button 1 | D2 / GPIO4 | Opens the menu; confirms the selected action |
| Button 2 | D3 / GPIO5 | Shows or hides the stats screen |
Connect module power and ground according to the module labels and the schematic. Verify voltage and pin order before powering the board.
Firmware setup
- Install Arduino IDE and add the Espressif ESP32 board package URL: https://espressif.github.io/arduino-esp32/package_esp32_index.json
- Install the ESP32 board package by Espressif Systems and select XIAO_ESP32C3 under Tools → Board → esp32.
- Install Adafruit GFX Library, Adafruit SSD1306, Adafruit MPU6050, and DHT sensor library. Accept the IDE's dependency prompts.
- Open Firmware/Starbie/Starbie.ino, check the beginner settings and pin assignments, then upload to the XIAO ESP32-C3.
Button 1 opens the four-way menu. Tilt toward top for NAP, right for PLAY, bottom for FEED, or left for PET; press Button 1 again to confirm. Button 2 toggles stats. Shaking Starbie gives it a reaction and wakes it from a nap. The DHT11 can be disabled with USE_DHT11 if that sensor is not installed.
Repository layout
- Firmware/Starbie/Starbie.ino — Arduino firmware.
- starbie/ — KiCad schematic, board, and project files.
- assests/ — project renders, schematic, and PCB images (the directory name is intentionally kept as it exists in the repository).
- 3D Models/ — STEP models for the display, switches, sensor module, and controller.
- Imported Parts.pretty/ — custom KiCad footprints.
Reference
This project follows the Starbie Week 1 guide.
Parts
8| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1 |
| 1 | Conn_01x04_Pin | Imported Parts:Display_128x64_096_I2C | J1 |
| 1 | Conn_01x08_Pin | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J2 |
| 1 | DHT11 | Sensor:Aosong_DHT11_5.5x12.0_P2.54mm | U1 |
| 1 | LOGO | logo:logo | G*** |
| 1 | XIAO-ESP32-C3-SMD | Imported Parts:XIAO-ESP32-C6-DIP | U2 |
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Questions
How big is the Starbie PCB?
It measures 103.7 × 88.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Starbie use?
8 parts, built around the DHT11. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Starbie KiCad files?
From the notahuman404/AutoCADLearning repository on GitHub, at the commit this page was made from: the board is starbie/starbie.kicad_pcb and its schematic starbie/starbie.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Starbie design in my own project?
Its repository states no licence, so its author keeps all rights: ask notahuman404 before reusing the design.