2 layers116.8 × 30 mm
Type d
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
14 parts3kApache-2.0
2 layers72 × 48 mm
A compact, educational pulse oximeter PCB based on the Arduino Nano (ATmega328P). The board integrates an I²C pulse oximeter sensor module (MAX30100/MAX30102), an SSD1306 OLED display, 3-button navigation, power…
- Size
- 72 × 48 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 14
- Nets
- 31
- Pads
- 67
- Tracks, vias
- 54, 3
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 21 Aug 2026
- Updated
- 22 Aug 2026
Overview
Spo2 is an open-source printed circuit board by Yashas022, from the Yashas022/PCB_design repository on GitHub. It is a 2-layer board of 72 × 48 mm with 14 parts on 31 nets, routed with 54 tracks and 3 vias.
Its parts include 4 resistors, 3 capacitors, 3 switches, 2 ICs and 1 diode. It belongs with the AVR (ATmega, ATtiny) boards of this library.
README
README.mdDIY SpO₂ Monitoring PCB
A compact, educational pulse oximeter PCB based on the Arduino Nano (ATmega328P). The board integrates an I²C pulse oximeter sensor module (MAX30100/MAX30102), an SSD1306 OLED display, 3-button navigation, power regulation, and an LED alarm indicator onto a single prototyping PCB designed in KiCad.
Key Features
- Controller: Arduino Nano
- Display: 0.96" I²C SSD1306 OLED (128×64)
- Sensor Interface: MAX30102 via I²C with interrupt support (
D2) - User Input: 3 tactile push buttons (
MODE,UP,DOWN) - Alert System: Visual LED threshold alarm (
D6) - Design Tool: KiCad EDA
Repository Structure
My_project/
└── SPo2/
├── hardware/
│ ├── footprints/ # Custom footprint libraries (.pretty / .kicad_mod)
│ ├── gerbers/ # Fabrication output files
│ ├── spo2.kicad_pro # KiCad project file
│ ├── spo2.kicad_sch # Schematic file
│ └── spo2.kicad_pcb # PCB layout file
├── docs/
│ ├── schematic.pdf # Schematic reference
│ └── bom.csv # Bill of materials
└── README.md # Project documentationParts
14| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100n | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C2, C3 |
| 3 | 1k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2, R3 |
| 3 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1, SW2, SW3 |
| 1 | 1K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R4 |
| 1 | Arduino_Nano_v2.x | Module:Arduino_Nano | A1 |
| 1 | LED | LED_THT:LED_D5.0mm | D1 |
| 1 | SSD1306 | spo2:SSD1306 | U2 |
| 1 | ~ | spo2:MAX30102 | U1 |
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Questions
How big is the Spo2 PCB?
It measures 72 × 48 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Spo2 use?
14 parts. 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 Spo2 KiCad files?
From the Yashas022/PCB_design repository on GitHub, at the commit this page was made from: the board is My_project/SPo2/spo2.kicad_pcb and its schematic My_project/SPo2/spo2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Spo2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask Yashas022 before reusing the design.