ET-A08
Qwiic Breadboard Adapter
Plug Qwiic boards into a breadboard or plain headers
AED 9.00
Out of stockOverview
Plug Qwiic boards into a breadboard or plain headers
The ET-A08 is built around the Plug any Qwiic / STEMMA QT board into a breadboard, or wire it to a microcontroller without Qwiic.
Two Qwiic / STEMMA QT connectors let you chain it with other boards without soldering, and the 2.54 mm header fits a breadboard.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Using Qwiic sensors on any board
- Breadboard prototyping
- Wiring to boards without Qwiic
Key features
What makes it different
Function
Plug any Qwiic / STEMMA QT board into a breadboard, or wire it to a microcontroller without Qwiic
Ports
2 × Qwiic (pass-through) + 4-pin 2.54mm header GND · VIN · SDA · SCL
Pull-ups
Optional 10kΩ (JP2, open by default)
Qwiic / STEMMA QT
Two JST-SH connectors plus a 2.54 mm header — 3.3 V and 5 V hosts.
Open documentation
Schematic, BOM and layout notes published for every board.
Breadboard friendly
Standard 2.54 mm pitch and M2.5 mounting holes.
Specifications
Technical specifications
| Function | Plug any Qwiic / STEMMA QT board into a breadboard, or wire it to a microcontroller without Qwiic |
|---|---|
| Ports | 2 × Qwiic (pass-through) + 4-pin 2.54mm header GND · VIN · SDA · SCL |
| Pull-ups | Optional 10kΩ (JP2, open by default) |
| Size | 25.4 × 17.8 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 2 × Qwiic / STEMMA QT (JST SH 4-pin) · 4-pin 2.54 mm header |
| Revision | Rev A |
| JP2 (default Open) | Bridge to add 10k pull-ups to VIN |
|---|
Performance
Bus speeds
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | Power | 3.3–5V |
| 2 | GND | Ground | Ground |
| 3 | SCL | I²C | I²C clock |
| 4 | SDA | I²C | I²C data |
Qwiic / STEMMA QT pins: GND, VIN, SDA, SCL (same on both connectors). I²C pull-ups (10 kΩ) are on the board; cut JP2 to remove them.
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-A08 Qwiic Breadboard Adapter (assembled)
- 1 × 4-pin 2.54 mm male header, unsoldered
Getting started
- Plug in a Qwiic / STEMMA QT cable, or solder the header and wire VIN, GND, SDA and SCL
Compare
Which I²C helper?
| Qwiic Breadboard Adapter (this board)This board | ET-A01 Qwiic 5-Port Hub | ET-A02 TCA9548A I²C Multiplexer | ET-A09 5V Arduino to Qwiic Adapter | |
|---|---|---|---|---|
| What it does | Plug Qwiic boards into a breadboard or plain headers | Split one Qwiic cable into five ports plus a header | Eight separate I²C channels, each with its own Qwiic port | Safe 3.3 V power and I²C levels for Qwiic on 5 V boards |
| Interface | — | — | I²C 0x70 (0x70–0x77 via jumpers); Qwiic in/out +… | — |
| Best for | Using Qwiic sensors on any board | Connecting several sensors at once | Several sensors with the same address | Qwiic sensors on Arduino Uno and Mega |
| Price | 9 AED | 9 AED | 22 AED | 23 AED |
Downloads
Documents and design files
Need a custom version of this board?
Different connector, size or sensor? We design and build custom variants.