Adafruit Feather STM32F405 Express
Best high-performance board for advanced embedded prototyping and complex sensor projects.
This board brings serious ARM Cortex-M4 horsepower to the compact Feather ecosystem, making it the go-to for complex projects that outgrow simpler microcontrollers. You sacrifice the simplicity of entry-level boards for raw speed and massive storage, but gain a professional-grade platform that handles demanding tasks with ease.
$24.95
at
Electromaker
Who it's for
- Engineers building complex, real-time embedded systems
- Developers preferring rapid prototyping with Python
- Makers utilizing the versatile Feather expansion ecosystem
Who should skip it
- Designers prioritizing long-term battery life for portable projects
- Hardware hackers needing extensive pin access for complex peripherals
- Budget-conscious hobbyists who only need basic processing power
Performance breakdown
Processing Power
The 168MHz Cortex M4 handles complex calculations with impressive speed.
Prototyping Versatility
STEMMA QT and Feather form factor make hardware integration remarkably simple.
Software Compatibility
Seamless support for CircuitPython, MicroPython, and Arduino IDE offers great flexibility.
Connectivity Options
USB-C and onboard SD storage provide robust data handling capabilities.
Power Management
Integrated LiPo charging simplifies portable project design and battery maintenance.
Component Compatibility
5V tolerant pins prevent common wiring headaches during rapid development.
Key Specs
Dimensions
52 mm x 23 mm x 10 mm
Weight
6.2g
Processor
STM32F405 Cortex M4 @ 168MHz
RAM
192MB
Flash
1MB on-chip + 2MB SPI Flash
Logic Level
3.3V, most pins 5V compliant
Power Input
USB C, LiPo
Interfaces
USB C, I2C (STEMMA QT/Qwiic), UART, GPIO, ADC, DAC, PWM, SDIO
Physical Interface Ports
USB-C, microSD Slot, JST Connector
Operating Voltage
3.3V
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