2 layers20.5 × 24.8 mm
2 layers42.6 × 9.3 mm
QWIIC breakout
whizzy-tech/QWIIC-breakoutBreakout board that brings data and clock out to a header for a logic analyzer, provides pins if you want to measure current, and optional pull up resistors.
- Size
- 42.6 × 9.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 8
- Nets
- 10
- Pads
- 25
- Tracks, vias
- 38, 6
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 16 May 2026
- Updated
- 17 May 2026
Overview
QWIIC breakout is an open-source printed circuit board by whizzy-tech, from the whizzy-tech/QWIIC-breakout repository on GitHub. It is a 2-layer board of 42.6 × 9.3 mm with 8 parts on 10 nets, routed with 38 tracks and 6 vias.
Its parts include 3 resistors, 3 connectors and 1 switch. It belongs with the interfaces and adapters and sensors and measurement boards of this library.
README
README.mdQWIIC-breakout
Breakout board that brings data and clock out to a header for a logic analyzer, provides pins if you want to measure current, and optional pull up resistors.
This uses KiCad 10.
Parts
8| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 4.7K | Resistor_SMD:R_1206_3216Metric | R2, R3 |
| 1 | 0 | Resistor_SMD:R_1206_3216Metric | R1 |
| 1 | Current Tap | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal | JP1 |
| 1 | I2C Signals | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Horizontal | J2 |
| 1 | Pullups | WT:DIP_SW_Aliexpress_01_P2.54_300mil | SW1 |
| 1 | QWIIC A | SparkFun-Connector:JST_1x04_P1.0mm_Horizontal_SMD | J1 |
| 1 | QWIIC B | SparkFun-Connector:JST_1x04_P1.0mm_Horizontal_SMD | J3 |
Questions
How big is the QWIIC breakout PCB?
It measures 42.6 × 9.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the QWIIC breakout use?
8 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 QWIIC breakout KiCad files?
From the whizzy-tech/QWIIC-breakout repository on GitHub, at the commit this page was made from: the board is QWIIC-breakout.kicad_pcb and its schematic QWIIC-breakout.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the QWIIC breakout design in my own project?
Its repository states no licence, so its author keeps all rights: ask whizzy-tech before reusing the design.
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