Adafruit HalloWing M4 Express
The Adafruit HalloWing M4 Express is a skull-shaped development board powered by the ATSAMD51G18 — a 120 MHz Cortex M4 processor with 512 KB Flash and 192 KB RAM. Featuring a 1.54" IPS TFT display (240×240 pixels), a 3-axis accelerometer, a light sensor, a speaker driver, four NeoPixel LEDs, and Feather-compatible headers, it's the ultimate board for wearables, badges, cosplay props, and spooky interactive projects.
A significant upgrade over the HalloWing M0, the M4 version offers 4× the display pixels on a brighter IPS panel, a much faster processor, more RAM, and side-mounted NeoPixel LEDs for underlighting effects. It supports both Arduino and CircuitPython, with 8 MB SPI Flash for storing images, sounds, and animations.
Key Features
- ATSAMD51G18 at 120 MHz – 512 KB Flash, 192 KB RAM, 3.3V logic
- 1.54" IPS Colour TFT Display – 240×240 pixels with excellent colour and brightness, ships with customisable eye animation
- 8 MB SPI Flash – Store images, sounds, and animations (up to ~3 minutes of WAV audio)
- 3-Axis Accelerometer – Built-in motion sensing
- Light Sensor – Front-facing, reverse-mounted for ambient light detection
- Mono Class-D Speaker Driver – Drives 4–8 ohm speakers up to 1W, connected to 12-bit DAC
- 4 NeoPixel Side-Light LEDs – For cool underlighting effects
- 4 Capacitive Touch Pads – Analog inputs with large alligator-clip holes
- Feather-Compatible Headers – Two female header strips accept FeatherWings
- JST Ports – 3-pin connectors for NeoPixels and sensors, 4-pin I²C connector (Grove-compatible)
- LiPo Battery Port – Built-in charging via USB
- 3.3V Regulator – 500 mA peak output
- On/Off Switch and Reset Button
- UF2 Bootloader – Drag-and-drop programming, easy CircuitPython conversion
Ideal For
- Halloween props and spooky interactive displays
- Wearable badges and cosplay electronics
- Sound, animation, and display-driven projects
- FeatherWing-compatible development and prototyping
Package Contents
- 1× Adafruit HalloWing M4 Express – Fully assembled with UF2 bootloader
Resources
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Adafruit HalloWing M4 Express is a skull-shaped development board powered by the ATSAMD51G18 — a 120 MHz Cortex M4 processor with 512 KB Flash and 192 KB RAM. Featuring a 1.54" IPS TFT display (240×240 pixels), a 3-axis accelerometer, a light sensor, a speaker driver, four NeoPixel LEDs, and Feather-compatible headers, it's the ultimate board for wearables, badges, cosplay props, and spooky interactive projects.
A significant upgrade over the HalloWing M0, the M4 version offers 4× the display pixels on a brighter IPS panel, a much faster processor, more RAM, and side-mounted NeoPixel LEDs for underlighting effects. It supports both Arduino and CircuitPython, with 8 MB SPI Flash for storing images, sounds, and animations.
Key Features
- ATSAMD51G18 at 120 MHz – 512 KB Flash, 192 KB RAM, 3.3V logic
- 1.54" IPS Colour TFT Display – 240×240 pixels with excellent colour and brightness, ships with customisable eye animation
- 8 MB SPI Flash – Store images, sounds, and animations (up to ~3 minutes of WAV audio)
- 3-Axis Accelerometer – Built-in motion sensing
- Light Sensor – Front-facing, reverse-mounted for ambient light detection
- Mono Class-D Speaker Driver – Drives 4–8 ohm speakers up to 1W, connected to 12-bit DAC
- 4 NeoPixel Side-Light LEDs – For cool underlighting effects
- 4 Capacitive Touch Pads – Analog inputs with large alligator-clip holes
- Feather-Compatible Headers – Two female header strips accept FeatherWings
- JST Ports – 3-pin connectors for NeoPixels and sensors, 4-pin I²C connector (Grove-compatible)
- LiPo Battery Port – Built-in charging via USB
- 3.3V Regulator – 500 mA peak output
- On/Off Switch and Reset Button
- UF2 Bootloader – Drag-and-drop programming, easy CircuitPython conversion
Ideal For
- Halloween props and spooky interactive displays
- Wearable badges and cosplay electronics
- Sound, animation, and display-driven projects
- FeatherWing-compatible development and prototyping
Package Contents
- 1× Adafruit HalloWing M4 Express – Fully assembled with UF2 bootloader
