RGB LEDs - Revision history

JaneMiller at 00:26, 28 March 2015

2015-03-28T00:26:58Z

JaneMiller at 00:25, 28 March 2015

2015-03-28T00:25:10Z

JaneMiller at 23:59, 27 March 2015

2015-03-27T23:59:47Z

JaneMiller at 23:10, 27 March 2015

2015-03-27T23:10:27Z

JaneMiller at 21:02, 13 March 2015

2015-03-13T21:02:41Z

JaneMiller at 21:00, 13 March 2015

2015-03-13T21:00:28Z

JaneMiller at 19:35, 13 March 2015

2015-03-13T19:35:04Z

JaneMiller at 19:02, 13 March 2015

2015-03-13T19:02:20Z

JaneMiller at 19:01, 13 March 2015

2015-03-13T19:01:15Z

JaneMiller: Created page with "'''WS2812 Addressable RGB LEDs (NeoPixels)''' Download the NeoPixels Library Wire up a circuit Write code Applications"

2015-03-13T18:57:14Z

Created page with "'''WS2812 Addressable RGB LEDs (NeoPixels)''' *Download the NeoPixels Library *Wire up a circuit *Write code *Applications"

New page

'''WS2812 Addressable RGB LEDs (NeoPixels)'''

*Download the NeoPixels Library
*Wire up a circuit
*Write code
*Applications

@@ Line 1: / Line 1: @@
-'''WS2812 Addressable RGB LEDs (NeoPixels)'''[[image:Adafruit_RGB_LEDS.jpg|thumb|250px|[http://www.adafruit.com/products/302 RGB LEDs]|right]]
+== WS2812 Addressable RGB LEDs ==
+ (NeoPixels)[[image:Adafruit_RGB_LEDS.jpg|thumb|250px|[http://www.adafruit.com/products/302 RGB LEDs]|right]]

@@ Line 10: / Line 10: @@
 **If you don't have a "Libraries" folder in Arduino/Libraries, create one and put the Adafruit_NeoPixels folder in it
 *Restart the Arduino IDE if it's already running
-*Open up a new Arduino sketch (program) and check to see if the Adafruit NeoPixels library is installed by going to
+*Open up a new Arduino sketch (program) and check to see if the Adafruit NeoPixels library is installed by going to Sketch-->Import Library and seeing if the NeoPixels library is listed.
- Sketch-->Import Library and seeing if the NeoPixels library is listed.
 ----
-'''Wire Up Your LEDs'''[[image:RGB_LEDs_Wiring.jpg|thumb|150px|[https://cdn.sparkfun.com/datasheets/Components/LED/COM-12877.pdf RGB LEDs Datasheet]|right]][[image:RGB_LEDs_Wiring_Diagram.jpg|thumb|100px|Wiring up Two LEDs|right]]
+[[image:RGB_LEDs_Wiring.jpg|thumb|100px|[https://cdn.sparkfun.com/datasheets/Components/LED/COM-12877.pdf RGB LEDs Datasheet]|right]]
+[[image:RGB_LEDs_Wiring_Diagram.jpg|thumb|350px|Wiring up Two LEDs|right]]
+'''Wire Up Your LEDs'''
 *The pinout for one of our RGB LEDs is as shown to the right
 *When creating a circuit with RGB LEDs, make sure to have a 300-500 ohm resistor on the data input for the first LED
+**Also make sure to connect the ground wire, then the +5V wire
-*The next diagram down to the right shows how to wire up two RGB LEDs in a chain to an Arduino Uno.
+**When disconnecting, disconnect power, then ground
- The signal for the second LED will travel through the first one.
+*The next diagram down to the right shows how to wire up two RGB LEDs in a chain to an Arduino Uno.
+**The signal for the second LED will travel through the first one.
@@ Line 32: / Line 54: @@
 ----
-*Write code
+'''Writing Code'''
-*Applications
+*This program is a simple test program based on the "simple" example program that comes with the NeoPixels Library.
+*If you're using the circuit diagrammed above, this program should make both of your LEDs a moderate green color
+<pre>
+#include <Adafruit_NeoPixel.h>
+#include <avr/power.h>
+// Which pin on the Arduino is connected to the NeoPixels?
+// On a Trinket or Gemma we suggest changing this to 1
+#define PIN            8
+// How many NeoPixels are attached to the Arduino?
+#define NUMPIXELS      2
+// When we setup the NeoPixel library, we tell it how many pixels, and which pin to use to send signals.
+// example for more information on possible values.
+Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_RGB + NEO_KHZ800);
+int delayval = 500; // delay for half a second
+void setup() {
+  pixels.begin(); // This initializes the NeoPixel library.
+}
+void loop() {
+  // For a set of NeoPixels the first NeoPixel is 0, second is 1, all the way up to the count of pixels minus one.
+  for(int i=0;i<NUMPIXELS;i++){
+    // pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
+    pixels.setPixelColor(i, pixels.Color(0,150,0)); // Moderately bright green color.
+    pixels.show(); // This sends the updated pixel color to the hardware.
+    delay(delayval); // Delay for a period of time (in milliseconds).
+  }
+}
+</pre>
+*The other examples in the NeoPixels example folder give demonstrations of more complex programs and other displays you can create with the NeoPixels
+----
+'''Applications'''
+*RGB LEDs are great to use as analog "status" lights telling you information such as:
+**How much battery something has left
+**How much pressure is applied to something
+**If it's an appropriate time to trigger some other action

@@ Line 10: / Line 10: @@
 **If you don't have a "Libraries" folder in Arduino/Libraries, create one and put the Adafruit_NeoPixels folder in it
 *Restart the Arduino IDE if it's already running
-*Open up a new Arduino sketch (program) and check to see if the Adafruit NeoPixels library is installed by going to Sketch-->Import Library and seeing if the NeoPixels library is listed.
+*Open up a new Arduino sketch (program) and check to see if the Adafruit NeoPixels library is installed by going to
+ Sketch-->Import Library and seeing if the NeoPixels library is listed.
 ----
-'''Wire Up Your LEDs'''[[image:RGB_LEDs_Wiring.jpg|thumb|150px|[https://cdn.sparkfun.com/datasheets/Components/LED/COM-12877.pdf RGB LEDs Datasheet]|right]]
+'''Wire Up Your LEDs'''[[image:RGB_LEDs_Wiring.jpg|thumb|150px|[https://cdn.sparkfun.com/datasheets/Components/LED/COM-12877.pdf RGB LEDs Datasheet]|right]][[image:RGB_LEDs_Wiring_Diagram.jpg|thumb|100px|Wiring up Two LEDs|right]]
-[[image:RGB_LEDs_Wiring_Diagram.jpg|medium|150px|Wiring up Two LEDs|center]]
+*The pinout for one of our RGB LEDs is as shown to the right
+*When creating a circuit with RGB LEDs, make sure to have a 300-500 ohm resistor on the data input for the first LED
+*The next diagram down to the right shows how to wire up two RGB LEDs in a chain to an Arduino Uno.
+ The signal for the second LED will travel through the first one.

@@ Line 16: / Line 16: @@
 '''Wire Up Your LEDs'''[[image:RGB_LEDs_Wiring.jpg|thumb|150px|[https://cdn.sparkfun.com/datasheets/Components/LED/COM-12877.pdf RGB LEDs Datasheet]|right]]
+[[image:RGB_LEDs_Wiring_Diagram.jpg|medium|150px|Wiring up Two LEDs|center]]
-*Diagram of how to wire 2 RGB LEDs together goes here

← Older revision		Revision as of 21:02, 13 March 2015
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	butt

	'''Install the NeoPixels Library'''		'''Install the NeoPixels Library'''

@@ Line 2: / Line 2: @@
 [[image:Adafruit_RGB_LEDS.jpg|thumb|300px|[http://www.adafruit.com/products/302 RGB LEDs]|right]]
-*Download the NeoPixels Library
+'''Install the NeoPixels Library'''
-*Wire up a circuit
+*[https://github.com/adafruit/Adafruit_NeoPixel Download ZIP of all library files here]
+*Unzip the ZIP file when it's done downloading
+*Put all of the files from the folder into a new folder called "Adafruit_NeoPixels"
+*Put this new folder into your Adruino Libraries folder (usually located at  (home folder)/Documents/Arduino/Libraries)
+**If you don't have a "Libraries" folder in Arduino/Libraries, create one and put the Adafruit_NeoPixels folder in it
+*Restart the Arduino IDE if it's already running
+*Open up a new Arduino sketch (program) and check to see if the Adafruit NeoPixels library is installed by going to Sketch-->Import Library and seeing if the NeoPixels library is listed.
+----
+'''Wire Up Your LEDs'''
+[[image:RGB_LEDs_Wiring.jpg|thumb|300px|[https://cdn.sparkfun.com/datasheets/Components/LED/COM-12877.pdf RGB LEDs Datasheet]|right]]
+----
 *Write code
 *Applications