

Heartbie
cute little virtual pet on even cuter PCB
- Size
- 119.7 × 118.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 24
- Nets
- 35
- Pads
- 78
- Tracks, vias
- 240, 0
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 10 Oct 2026
- Updated
- 12 Oct 2026
Overview
Heartbie is an open-source printed circuit board by SILLYIEST, from the SILLYIEST/HalfLifeHardware repository on GitHub. It is a 2-layer board of 119.7 × 118.8 mm with 24 parts on 35 nets, routed with 240 tracks and 0 vias.
It is built around the DHT11. Its parts include 7 resistors, 6 diodes, 2 ICs, 2 connectors and 2 switches. It belongs with the ESP32 and RISC-V boards of this library.
Main components
1README
README.mdHeartbie

Mini pet that you can interact with! (Based off of the starter project Starbie)
This was so fun to create! I love doing personal projects (despite having no prior experience here T-T)
Parts
24| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | LED | LED_THT:LED_D5.0mm | D1, D2, D3, D4, D5, D6 |
| 6 | R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R3, R4, R5, R6, R7 |
| 5 | LOGO | LOGO | G***, G***, G***, G***, G*** |
| 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 | XIAO-ESP32-C3-SMD | Imported Parts:XIAO-ESP32-C3-SMD | U2 |
Questions
How big is the Heartbie PCB?
It measures 119.7 × 118.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Heartbie use?
24 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 Heartbie KiCad files?
From the SILLYIEST/HalfLifeHardware repository on GitHub, at the commit this page was made from: the board is Week 1 - Heartbie/PCB/Heartbie.kicad_pcb and its schematic Week 1 - Heartbie/PCB/Heartbie.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Heartbie design in my own project?
Its repository states no licence, so its author keeps all rights: ask SILLYIEST before reusing the design.
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