What's going to protect your beloved Raspberry Pi from an onslaught of rainbow-coloured fusion? That's right, it's Unicorn pHAT.
Sporting a matrix of 32 (8 x 4) RGB LEDs and powered directly from the Pi, this is the most compact pocket aurora available.

Unicorn pHAT provides a wash of controllable colour that is ideal for mood-lighting, pixel art, persistence of vision effects, status indications, or just blasting colour into your surroundings.

Features

• 32 RGB LEDs (SK6218 - 3.5mm x 3.5mm)
  
• LED data driven via DMA over PWM
  
• Unicorn pHAT pinout
  
• Compatible with Raspberry Pi 3B+, 3, 2, B+, A+, Zero, and Zero W
  
• Python library
  
• Female header requires soldering
  

Software

Unicorn pHAT uses the same Python library, so it's super-easy to use, should automatically detect that you're using the pHAT and includes some examples written specially for Unicorn pHAT. The library/ software does not support Raspbian Wheezy.

Notes

Warning: SK6218 LEDs are bright enough to cause eye pain, do not look at them directly when brightly lit. We recommend using Unicorn pHAT at lower brightness levels.

Photo-sensitivity warning: flashing, strobing, and patterns of lights may cause epileptic seizures. Always take care and immediately stop using if you feel unwell (dizziness, nausea, affected vision, eye twitching, disorientation).

Power: Unicorn pHAT works best with a >2A microUSB power supply for your Pi. We recommend the official Raspberry Pi power supply.

Compatibility (audio): as Unicorn pHAT uses PWM and GPIO18, it will interfere with analogue audio playback (random colour patterns and flickering). HDMI should work just fine! :