Built with the ATSAMD51J19 Cortex M4 processor running at 120 MHz, the Feather M4 Express is a powerful and flexible board for robotic applications. It supports CircuitPython and Arduino IDE, and includes USB, LiPo battery charging, and a STEMMA QT connector for easy sensor integration.
Product Description
The Adafruit Feather M4 Express (ATSAMD51-based) is a high-performance, compact development board designed for makers, educators, and embedded enthusiasts. Here’s what makes it stand out:
- Processor: ATSAMD51J19A, a 120 MHz ARM Cortex-M4 with floating-point and DSP instructions — delivering smooth, efficient performance.
- Memory: 512 KB flash and 192 KB RAM for executing heavy code and managing tasks.
- Built-in 2 MB SPI Flash: Functions as onboard storage—perfect for CircuitPython libraries, scripts, and data logging
- USB Native Support with a UF2 bootloader: makes reprogramming as easy as dragging and dropping files.
- Battery Charging: Built-in LiPo charger (100 mA) with status LED and JST connector.
- Power Regulation: 3.3 V regulator capable of delivering up to 500 mA.
- Measures around 50.8 × 22.8 × 7 mm (roughly 2.0" × 0.9" × 0.28") and weighs about 5 g—ideal for compact and portable devices.
- Includes 4 mounting holes, a reset button, and an enable (EN) pin for switching off the 3.3 V regulator.
- website:https://www.adafruit.com/product/3857
Controller Specific
| Attribute | Value | Description | Why It Matters |
|---|---|---|---|
| Processor Type | N/A | CPU architecture and speed | Computational capability |
| I/O Capacity | N/A | Digital/analog input/output count | System integration capacity |
| Memory | N/A | RAM and storage capacity | Program complexity capability |
| Real-time Capability | N/A | Deterministic response time | Motion control precision |
| Communication Interfaces | N/A | Network and fieldbus support | System connectivity |
| Programming Environment | N/A | Development software | Ease of implementation |
| Safety Features | N/A | Functional safety compliance | Human safety requirements |
| Expansion Options | N/A | Modular expansion capability | System scalability |
Form Factor
| Attribute | Value | Description | Why It Matters |
|---|---|---|---|
| Height | N/A | Total standing height (cm) | Human-scale enables use of tools, navigation of spaces |
| Width | N/A | Shoulder-to-shoulder width (cm) | Affects balance, door/passage fit |
| Weight | N/A | Total mass (kg) | Impacts mobility, safety, power usage, transportability |
Power System
| Attribute | Value | Description | Why It Matters |
|---|---|---|---|
| Battery Type | N/A | Li-ion / LiFePO4 / etc. | Determines energy density, safety |
| Battery Capacity | N/A | Wh or Ah | Impacts range and operating time |
| Operating Duration | N/A | Hours under normal load | Key for logistics, shift planning |
Performance
| Attribute | Value | Description | Why It Matters |
|---|---|---|---|
| Payload Capacity | N/A | Maximum carrying capacity (kg) | Determines real-world utility |
| Speed | N/A | Maximum operational speed | Task completion rate & productivity |
| Precision | N/A | Positioning accuracy (mm) | Quality of work & application suitability |
| Repeatability | N/A | Consistency of positioning (±mm) | Manufacturing quality & reliability |
| Cycle Time | N/A | Time per standard operation | Productivity & throughput calculations |
| MTBF | N/A | Mean Time Between Failures (hours) | Reliability & maintenance planning |
| Service Life | N/A | Expected operational lifespan (years) | ROI calculations & replacement planning |
Connectivity
| Attribute | Value | Description | Why It Matters |
|---|---|---|---|
| Communication Protocol | N/A | Wi-Fi / Ethernet / 5G / Bluetooth | Network integration capabilities |
| Remote Control | N/A | Web / App / Joystick / API | Needed for manual override or remote training |
| Programming Interface | N/A | Drag-drop / Code / Visual / Teach pendant | Ease of deployment and customization |
| Integration APIs | N/A | Available software interfaces | System integration capabilities |
| Cloud Connectivity | N/A | Cloud platform compatibility | Data analytics & remote monitoring |
| Security Features | N/A | Encryption & authentication methods | Cybersecurity compliance |
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