Datasheet

Each Pixie not only contains that aforementioned 3W LED, it also has a Microchip PIC

microcontroller. You send it the color you want to appear at standard 115200 baud (1 byte

per color). You can send a longer string of pixel data and it will 'forward' along the

messages so you can chain them like a shift register. You only have to send the data once

per color change. Once set, the microcontroller does all the PWM handling for you.

You do have to send it data every 1 second at a minimum (as a protection against the

bright and hot LEDs staying 'stuck on', they will eventually timeout if no updates are

received)