If you order the GEMMA Sensor Pack, you'll have most everything you need. The one exception is the amount of NeoPixels. Since there are five lights/sounds for Close Encounters, you may want to purchase 6 additional NeoPixels to supplement the 4 that come with the kit. That way you'll have lights for the front and back of your hat.

This intermediate level wearables project requires some soldering and sewing. We recommend checking out the following guides before you begin:

• Adafruit Guide To Excellent Soldering
• Adafruit NeoPixel Überguide
• Introducing GEMMA or Introducing Gemma M0 guide

Make sure you have the Adafruit Arduino software installed for GEMMA, or hop on Codebender.

For this project you'll need:

• Gemma M0 or Original Gemma (M0 type is recommended!)
• NeoPixels (Total of 10)
• Photo Cell
• Piezo Buzzer
• 500mAh LiPoly Battery and Charger
• 10k Resistor
• Conductive Thread
• Alligator clips
• Soldering iron and Solder
• Heat Shrink Tubing
• Wire strippers, and Flush Diagonal Cutters
• (optional but very helpful) Third Hand Tool
• One stainless steel snap
• Sewing needle and Thread
• Scissors
• Adhesive Velcro
• Bucket Hat (we recommend getting one size up to save room for the battery