July 21, 2014 AT 4:00 pm

Tutorial on Programming the NeoPixel (WS2812) RGB LEDs using a PIC microcontroller and C-language

Shahriar of The Signal Path posted this video tutorial on programming our NeoPixel 60 Ring – WS2812 5050 RGB LED w/ Integrated Drivers using a PIC micro controller and C-language.

In this episode Shahriar takes a close look at programming the popular NeoPixel RGB LEDs using a PIC microcontroller and C-language. A close-up of the NeoPixel (WS2812) LED is shown with attention to identifying various semiconductor elements inside the package. The principle operation of the LED is the described along with a detailed explanation of the pins and the one-wire communication protocol.

A simple evaluation board for the PIC18F4550 is used to drive a circular array of 60 NeoPixel LEDs from Adafruit. After presenting the difficulties of providing an accurate pulse-shape using the C-language, the measured waveform is shown on a Tektronix MDO4000B. Finally, the code for a circular color rotating pattern is presented and demoed. The code for the experiment can be downloaded here.

Read more.


Featured Adafruit Product!

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NeoPixel 1/4 60 Ring – WS2812 5050 RGB LED w/ Integrated Drivers: The biggest NeoPixel Ring yet! With four of these you can make a huge ring with 60 ultra bright smart LED NeoPixels are arranged in a circle with a 6.2″ diameter. Each order comes with just the quarter ring. Four of this item are required to make a large ring. You will have to solder them together as well, so for the full ring of 60 LEDs, buy four and solder them together! Read more.


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