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Resource Details

Title Intermediate Wearables Sushi


Language Wearables
Level Intermediate
Length 2 Dojos
Medium Sushi Card
Format PDF

CoderDojo Foundation


Ninjas decorate a t-shirt with coloured flashing lights controlled by code.

What's Covered

  • Testing NeoPixels
  • Stitching a NeoPixel circuit with positive, negative and data flow
  • The flow of a Flora program (setup and loop functions)
  • Turning NeoPixels on and off
  • Addressing individual NeoPixels
  • RGB colour mixing
  • Functions and parameters
  • for loops
  • Exploring more advanced examples

Materials Required

  • Adafruit Flora or Gemma and a USB cable
  • Around eight NeoPixels
  • Conductive thread
  • Three pairs of crocodile clips (you could use pieces of conductive thread instead but crocodile clips are easier to test with)
  • Optional: a battery pack to make the project portable
  • Embroidery needle and scissors
  • T-shirt or other fabric
  • Embroidery hoop - strongly recommended as it makes stitching much easier
  • Recommended: clear nail polish

Expected cost

Prices vary depending on what you buy and where you buy it from but you can expect to pay approximately €30-50 for the hardware for one project (excl online delivery charges). The Gemma is much smaller and cheaper than the Flora but is not as widely compatible. It also may be cheaper to buy parts separately or in a kit. Advice: shop around!


The Sushi Cards are in a web based format and can be read online (recommended) at the link below. Read the Sushi Cards!

They can also be downloaded in PDF format for printing. Visit this page, select a Language and click Download PDF.