Everytime I see something cool done on this forum using a Teensy 3.1 I'm inclined to try it myself and in the process have to spend more money and buy more stuff. Luckily this time the stuff was an inexpensive 1.4" Red Serial 128X128 SPI Color TFT LCD display bought on eBay. After reading about somotoy's speedy driver for this display I just had to try it myself.

For the record, I connected the Teensy 3.1 to the display as follows:

Teensy 3.1 Pin         LCD Pin
      3.3V               Vcc
      Gnd                Gnd
      10                 CS
      14                 RESET
      9                  A0
      11                 SDA
      13                 SCK
      3                  LED

Because of the compact size of the display and the Teensy, I decided to build a necklace for a friend. A 3.7 V 500mAh LiPo battery and switch completed the build. I haven't yet built a case for the necklace but I will when the snow melts and the weather warms up so I can work in the garage.

When the Necklace is powered up it displays a series of six dynamic and colorful patterns over and over. Each pattern is displayed for a set length of time which can be changed in the code. 

Enough about the hardware. The necklace would only be as cool as the software for it so besides the code I wrote, I borrowed bits and pieces of code from the FastLED project, the Aurora Project and others. Special mention goes to

Somotoy for the incredibly fast display driver 
Stefan Petrick for his beauiful Mandala display code
Jason Coon and Mark Kriegsman for the Noise display code
Jozsef Fejes for his Rainbow Smoke pattern code (which I refer to as Watercolor)
Jason Coon again for his Waves display pattern

Additionally, the following libraries are required to get the code running.
FastLED v.3.1
Adafruit_GFX
TFT_ILI9163C
SPI

I take no credit for other people's code except for porting and modifying the code to run in my "Necklace" environment.

I haven't had time to shoot a video showing the necklace in operation but I assure you it is very beautiful and attention getting.

A zip file for the Necklace code can be found at: http://www.craigandheather.net/misc/Necklace.zip

If you have this display already you should try out this code. 




