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Item #:
20291646
Adafruit Feather M0 Express - Designed for CircuitPython
Item #:
20291646
BHD 14
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What Stands Out
CircuitPython Compatible
The Feather M0 Express is specifically designed to work seamlessly with CircuitPython, enabling users to easily write and upload Python code, making it ideal for beginners and educators.
Compact Design
Its lightweight and compact form factor allows for easy integration into projects, making it suitable for both small devices and larger projects requiring a versatile microcontroller.
Rich Connectivity
Equipped with built-in Wi-Fi and Bluetooth capabilities, the Feather M0 Express provides extensive connectivity options, allowing for innovative IoT applications and enhancing project possibilities.
Product Details
- ATSAMD21G18 ARM Cortex M0+ processor with 256K Flash and 32K RAM
- Measures 2.0 x 0.9 x 0.28 (51mm x 23mm x 8mm) without headers soldered in
- 20 GPIO pins, hardware Serial, hardware I2C, hardware SPI support
- 6 x 12-bit analog inputs, 1 x 10-bit analog ouput (DAC)
- Comes fully assembled and tested, with a USB bootloader
- Can be used with Arduino IDE or for loading CircuitPython
| RAM Memory Installed | 32 KB |
| Memory Storage Capacity | 2 MB |
| Processor Speed | 48 MHz |
| Connectivity Technology | I2C, USB |
| Operating System | CircuitPython |
| Processor Brand | Atmel |
| Wireless Compability | Bluetooth |
| Compatible Devices | Computers (PCs, laptops, tablets), microcontrollers, sensors, displays, other peripherals |
| RAM Memory Technology | LPDDR3 |
| Processor Count | 1 |
| Total Usb Ports | 1 |
| Brand | Adafruit |
| Model Name | Feather M0 Express |
| Built-In Media | Headers |
| UPC | 717520031277 |
| Unit Count | 1 Count |
| Manufacturer | Adafruit |
| Model Number | 3403 |
| Mfr Part Number | 3403 |
| Ram Memory Installed Size | 32 KB |
| CPU Speed | 48 MHz |
| Item Weight | 0.7 lbs (320 grams) |
Who Should Buy?
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Beginner Programmers
Ideal for those new to coding, Adafruit Feather M0 Express offers a straightforward path to learn CircuitPython.
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Prototyping Enthusiasts
Perfect for inventors and makers looking to prototype electronics with easy integration and lightweight components.
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IoT Projects
Great for Internet of Things applications, providing wireless capabilities and compatibility with various sensors and modules.
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Advanced Developers
More seasoned programmers may find the limitations of CircuitPython restrictive compared to more complex environments.
Product Description
Adafruit Feather M0 Express - Designed for CircuitPython
About This Item
Introducing the Adafruit PID 3403 Feather M0 Express - Designed for CircuitPython Unlock the power of circuitry and electronics with the Adafruit PID 3403 Feather M0 Express. This compact and versatile development board is designed specifically for use with CircuitPython, a beginner-friendly version of MicroPython. Whether you're new to programming or an experienced enthusiast, this board is perfect for exploring and creating with circuitry. At the heart of the Feather M0 Express is the ATSAMD21G18 ARM Cortex M0+ processor, delivering reliable performance with a clock speed of 48 MHz.
With 256KB of FLASH memory and 32KB of RAM, this board offers ample space for your projects, enabling you to store scripts, libraries, and files without compromise. The onboard USB port and built-in USB-to-Serial functionality make programming and debugging a breeze, eliminating the need for additional hardware. Additionally, the Feather M0 Express features a 32.768 KHz crystal for clock generation and real-time clock (RTC) capabilities. With its compact dimensions of 2.0 x 0.9 x 0.28 inches (51mm x 23mm x 8mm) and lightweight design at just 5 grams, this Feather M0 Express board offers both portability and convenience. Its 20 GPIO pins, hardware Serial, hardware I2C, and hardware SPI support provide flexibility for your projects.
You can also take advantage of the six 12-bit analog inputs and one 10-bit analog output (DAC) for precise control and measurements. The Adafruit PID 3403 Feather M0 Express comes fully assembled and tested, with a USB bootloader ready to quickly integrate with the Arduino IDE or to load CircuitPython. For added convenience, we provide headers that can be soldered in for easy connection to a solderless breadboard. Explore the possibilities of the Adafruit PID 3403 Feather M0 Express - Designed for CircuitPython. Whether you're a hobbyist, student, or professional, this development board empowers you to bring your ideas to life.
Get started today and join the CircuitPython community in shaping the future of electronics. Keywords: Adafruit Feather M0 Express, CircuitPython programming, ATSAMD21 Cortex M0 microcontroller, Feather M0 Express board, CircuitPython programming language, ATSAMD21 Cortex M0 development board, Adafruit M0 Express Feather, CircuitPython programming tutorial, ATSAMD21 Cortex M0 support, Feather M0 Express development board, CircuitPython projects, ATSAMD21 Cortex M0 datasheet, Adafruit Feather M0 Express guide, CircuitPython libraries, ATSAMD21 Cortex M0 specifications, Feather M0 Express pinout, CircuitPython code examples, ATSAMD21 Cortex M0 programming, Adafruit Feather M0 Express features, CircuitPython tutorials, ATSAMD21 Cortex M0 documentation.
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Product Buying Guide
The Adafruit PID 3403 Feather M0 Express is a versatile microcontroller designed for use with circuitry and electronics. It is equipped with the beginner-friendly CircuitPython and can also be used with Arduino IDE, making it an ideal choice for experimenting, learning, and prototyping.
Product Specifications
- ATSAMD21G18 ARM Cortex M0+ processor with 256K Flash and 32K RAM
- Measures 2.0 x 0.9 x 0.28 inches without headers soldered in
- 20 GPIO pins, hardware Serial, hardware I2C, hardware SPI support
- 6 x 12-bit analog inputs, 1 x 10-bit analog ouput (DAC)
- USB native support, built-in 100mA lipoly charger with charging status indicator LED
- 2 MB SPI Flash storage, Mini NeoPixel, and a little prototyping space
Key Features
- Versatile use with CircuitPython and Arduino IDE
- Highly capable ATSAMD21G18 processor
- USB native support and serial port debugging
- Multiple GPIO pins, analog inputs, and analog output
- Built-in 100mA lipoly charger and 2 MB SPI Flash storage
Usage Scenarios
- Learning and experimenting with CircuitPython or Arduino programming
- Prototyping and creating projects with circuitry and electronics
- Datalogging, file storage, and access over USB
Usage Scenarios
Some of the competitors for Adafruit PID 3403 Feather M0 Express include SparkFun SAMD21 Mini Breakout, Arduino Zero, and Teensy 3.2.
Some User Review
- Users appreciate the ease of use with CircuitPython and the compatibility with Arduino IDE.
- The availability of USB native support and built-in features like the lipoly charger is highly praised.
- The compact size and robust capabilities make it a popular choice for projects and prototyping.
Competitors
The cost of Adafruit PID 3403 Feather M0 Express is competitive when compared to its counterparts, offering great value for its features and capabilities.
Buying Considerations
- Consider your programming preferences and requirements - whether you prefer CircuitPython, Arduino IDE, or both
- Evaluate the need for specific features such as USB native support, GPIO pins, and built-in storage
- Take into account the size and form factor based on the intended usage and projects
Conclusion
The Adafruit PID 3403 Feather M0 Express is an excellent choice for beginners and experienced users alike, offering a wide range of features and capabilities for learning, experimenting, and prototyping with circuitry and electronics.
View LessThe Adafruit PID 3403 Feather M0 Express is a versatile microcontroller designed for use with circuitry and electronics. It is equipped with the beginner-friendly CircuitPython and can also be used with Arduino IDE, making it an ideal choice for experimenting, learning, and prototyping. Continue Reading
Customer Questions & Answers
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Answer: The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.
Adafruit Single Board Computers 3403 Editorial Review
**** The Adafruit Feather M0 Express has garnered positive feedback from customers who appreciate its versatility and ease of use. Designed primarily for CircuitPython, this microcontroller also supports Arduino coding, allowing users to switch between programming languages without a steep learning curve. Many users have found it to be reasonably priced for the capabilities it offers, especially those focusing on projects requiring battery operation, thanks to the built-in LiPo charger. Customers highlight its performance in data-logging applications, citing successful implementations with additional components such as real-time clocks and thermocouple amplifiers. The user-friendly Mu interface enhances the coding experience, allowing for quick updates and real-time script execution, which is especially beneficial for debugging purposes. Adafruit’s commitment to open-source software and a strong community presence is also a recurring theme in reviews. Users appreciate the availability of examples on the Adafruit website and the straightforward instructions that accompany updates for the device. Any learning curve is minimal for those already familiar with Python, making the M0 Express accessible for both seasoned programmers and newcomers. While there are some challenges such as the need for soldering skills for certain applications, the overall sentiment is overwhelmingly positive. Customers feel confident in the product's reliability and are satisfied with their purchase, often returning for more projects with Adafruit's range of offerings. **
Customer Reviews & Ratings
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Pros
- Versatile support for both CircuitPython and Arduino code.
- Affordable price for the features provided.
- Built-in LiPo charger for battery-powered applications.
- Quick updates and real-time script execution via the Mu interface.
- Strong community support and thorough documentation.
Cons
- Limited to 250 lines of CircuitPython code.
Platform Trust & Buyer Confidence
T
trusttaker
Verified buyer
“I loved it. That was my second order, and I am already thinking of placing a third order.”
16-Jul-26 · via Trustpilot
HA
Haitham
Verified buyer
“Trusted merchant”
11 July 2026 · via Trustpilot
MB
Maryam
Verified buyer
“The order arrived fast and in perfect condition”
2 June 2026 · via Trustpilot
MA
Mohammad
Verified buyer
“Excellent quality and very fast delivery, I really appreciate your service, when you work good I will appreciate that, I am very satisfied , thank you”
13 June 2026 · via Trustpilot
T
Trusttaker
Verified buyer
“I loved it, that was my second order, I am thinking of a third order already.”
Jul 16, 2026 · via Trustpilot
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