Adafruit Feather M4 Express vs NXP LPC1768 mbed LPC1768
Side-by-side comparison of features, pricing, ratings, and alternatives.
The Feather M4 Express is a tiny development board built around the ATSAMD51 microcontroller, offering 120 MHz Cortex‑M4 performance with floating‑point support. It includes 2 MiB flash, 256 KiB RAM, and native USB, making it ideal for complex projects that need speed and storage. Its Feather‑compatible pinout lets you stack a wide range of add‑on boards, while the built‑in 3.3 V regulator and battery charger let you run untethered from a LiPo cell. Perfect for wearables, audio, and IoT prototypes that demand high‑speed processing in a small package.
The NXP LPC1768 mbed board is a compact development platform featuring a 32‑bit ARM Cortex‑M3 MCU running at 100 MHz. It includes on‑board USB, Ethernet, and a range of I/O pins, making it ideal for rapid prototyping of embedded applications. Supported by the mbed OS ecosystem, the board provides easy access to libraries, cloud services, and a web‑based IDE, allowing developers to focus on functionality rather than low‑level setup. Its robust peripherals and extensive community support make it a go‑to choice for education, hobby projects, and early‑stage product development.
- High clock speed with floating‑point unit
- Large flash and RAM for complex projects
- Native USB and battery charging on board
- Extensive FeatherWing accessory ecosystem
- Extensive mbed OS library support
- Built‑in Ethernet and USB ports
- Rich set of I/O peripherals
- Strong community and documentation
- No built‑in Wi‑Fi or Bluetooth; requires external module
- 3.3 V only, no 5 V tolerant pins
- Limited GPIO count compared to larger boards
- No built‑in Wi‑Fi module (requires external shield)
- Limited flash compared to newer MCUs
- Power consumption higher than ultra‑low‑power chips
More alternatives & similar tools
Alternatives to Adafruit Feather M4 Express
View all →A high-performance ARM Cortex-M7 development board designed for demanding embedded applications.
An ultra-small Arduino-compatible microcontroller powerhouse designed for space-constrained projects.
Compact Feather board with RP2350 dual‑core MCU and high‑speed HSTX port.
An all-in-one Bluetooth Low Energy and Cortex-M4 development board.
Alternatives to NXP LPC1768 mbed LPC1768
View all →Fast, powerful ARM Cortex‑M4 board in a compact Feather form factor
Compact ESP32 board with touch screen, battery and sensors for rapid IoT prototyping
A high-performance ARM Cortex-M7 development board designed for demanding embedded applications.
The Verdict
AI-generated from listing dataThe Feather M4 offers higher speed and more memory in a tiny, battery‑friendly package, while the LPC1768 gives built‑in Ethernet and richer I/O at a higher price.
Key differences
- •CPU speed and floating‑point: 120 MHz Cortex‑M4 vs 100 MHz Cortex‑M3
- •Memory: 2 MiB flash/256 KiB SRAM vs 512 KB flash/64 KB SRAM
- •Connectivity: Feather has only USB and optional wireless; LPC1768 includes USB 2.0 host/device plus 10/100 Mbps Ethernet
- •Form factor & weight: Feather is 51×23×8 mm, 6 g; LPC1768 is 85×53×15 mm, 30 g
- •Price: $24.95 vs $55
Performance
Feather M4 runs 120 MHz with hardware FP and 4× flash, 4× RAM versus LPC1768’s 100 MHz and smaller memory.
Build quality
LPC1768 is larger with robust RJ45 Ethernet jack; Feather is ultra‑compact but minimal enclosure.
Connectivity
LPC1768 provides native USB host/device and Ethernet; Feather only native USB and needs external Wi‑Fi/BLE.
Power & efficiency
Feather includes LiPo charger and 3.3 V regulator for battery operation; LPC1768 is USB‑powered only.
Compatibility
Both are open‑source, support Arduino‑style shields (Feather via FeatherWing, LPC via 2×20 adapter) and C/C++.
Price & value
Feather costs $24.95, roughly half the LPC1768’s $55 while offering more CPU power and memory.
Warranty & support
Both offer a 1‑year warranty and have active community documentation.
Choose Adafruit Feather M4 Express if…
Ideal for makers needing high‑speed processing, battery operation, and a tiny footprint without built‑in networking.
Choose NXP LPC1768 mbed LPC1768 if…
Best for projects that require wired Ethernet, richer I/O, and extensive mbed OS libraries despite higher cost.
Common questions
Which board gives more processing power for complex code?
The Feather M4, with a 120 MHz Cortex‑M4 and 2 MiB flash/256 KiB SRAM, outperforms the LPC1768’s 100 MHz Cortex‑M3 and 512 KB flash/64 KB SRAM.
Do either boards include built‑in Wi‑Fi or Bluetooth?
Neither includes Wi‑Fi/Bluetooth; both require external modules, though the LPC1768’s mbed OS libraries support them via shields.
Is the Feather M4 suitable for a battery‑powered IoT sensor?
Yes; it has an on‑board LiPo charger and 3.3 V regulator, making it ready for battery operation.