NeoPixel Heart

In this project we’re building an LED heart with NeoPixels. This uses Black LED acrylic to diffuse the NeoPixels inside a 3D printed case. The heart is made from pieces of strips that are daisy chained to create a custom matrix.

3D Printed Case

The ItsyBitsy nRF52840 and 500mah lipo battery are housed in a separate 3D printed case. With a lipo backpack, you can recharge the battery over USB. We think this case will work nicely for your next wearable project. A button lets you trigger a reset, so you can easily update the firmware.

BLE with ItsyBitsy

You can change the colors of the LEDs using the Adafruit BLE Connect app for iOS or Android. You can also trigger LED animations like the classic Paint your Dragon rainbow swirl. With the ItsyBitsy nRF52840, you can easily add BLE to your wearable projects.

Parts List

Adafruit ItsyBitsy nRF52840 Express - Bluetooth LE

What's smaller than a Feather but larger than a Trinket? It's an Adafruit ItsyBitsy nRF52840 Express featuring the Nordic nRF52840 Bluetooth LE...

Adafruit Mini Skinny NeoPixel Digital RGB LED Strip - 144 LED/m

So thin. So mini. So teeeeeeny-tiny. It's the 'skinny' version of our classic NeoPixel strips!These NeoPixel strips have 144 digitally-addressable pixel Mini LEDs...

Adafruit LiIon/LiPoly Backpack Add-On for Pro Trinket/ItsyBitsy

If you have an ItsyBitsy or Pro Trinket you probably know it's the perfect little size for a portable project. This LiPoly backpack makes it really easy to do! Instead of wiring 2...

Lithium Ion Polymer Battery - 3.7v 500mAh

Lithium ion polymer (also known as 'lipo' or 'lipoly') batteries are thin, light and powerful. The output ranges from 4.2V when completely charged to 3.7V. This battery...

Breadboard-friendly SPDT Slide Switch

These nice switches are perfect for use with breadboard and perfboard projects. They have 0.1" spacing and snap in nicely into a solderless breadboard. They're easy to switch...

Silicone Cover Stranded-Core Ribbon Cable - 10 Wire 1 Meter Long

For those who are fans of our silicone-covered wires, but are always looking to up their wiring game. We now have Silicone Cover Ribbon cables! These may look...

Fully Reversible Pink/Purple USB A to micro B Cable - 1m long

This cable is not only super-fashionable, with a woven pink and purple Blinka-like pattern, it's also fully reversible! That's right, you will save seconds a day by...
1 x Black LED Acrylic
100mm x 100mm - 1/8in thickness
1 x 1/8in Flat End Mill
Single Flute Upcut
1 x Bantam Tools CNC
Desktop CNC Milling Machine

Inspirational Source:

This project was inspired by Charlyn Gonda's Ring project. Check it out on her website:

This guide was first published on Feb 12, 2020. It was last updated on Feb 12, 2020.
This page (Overview) was last updated on Aug 02, 2020.