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March 23, 2022 14:03
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SampleNeoPixel
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// NeoPixel Ring simple sketch (c) 2013 Shae Erisson | |
// Released under the GPLv3 license to match the rest of the | |
// Adafruit NeoPixel library | |
#include <Adafruit_NeoPixel.h> | |
#ifdef __AVR__ | |
#include <avr/power.h> // Required for 16 MHz Adafruit Trinket | |
#endif | |
// Which pin on the Arduino is connected to the NeoPixels? | |
#define PIN 3 // On Trinket or Gemma, suggest changing this to 1 | |
// How many NeoPixels are attached to the Arduino? | |
#define NUMPIXELS 16 // Popular NeoPixel ring size | |
// When setting up the NeoPixel library, we tell it how many pixels, | |
// and which pin to use to send signals. Note that for older NeoPixel | |
// strips you might need to change the third parameter -- see the | |
// strandtest example for more information on possible values. | |
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800); | |
#define DELAYVAL 500 // Time (in milliseconds) to pause between pixels | |
void setup() { | |
// These lines are specifically to support the Adafruit Trinket 5V 16 MHz. | |
// Any other board, you can remove this part (but no harm leaving it): | |
#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000) | |
clock_prescale_set(clock_div_1); | |
#endif | |
// END of Trinket-specific code. | |
pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED) | |
} | |
void loop() { | |
pixels.clear(); // Set all pixel colors to 'off' | |
// The first NeoPixel in a strand is #0, second is 1, all the way up | |
// to the count of pixels minus one. | |
for(int i=0; i<NUMPIXELS; i++) { // For each pixel... | |
// pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255 | |
// Here we're using a moderately bright green color: | |
pixels.setPixelColor(i, pixels.Color(0, 150, 0)); | |
pixels.show(); // Send the updated pixel colors to the hardware. | |
delay(DELAYVAL); // Pause before next pass through loop | |
} | |
} |
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