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August 2, 2025 04:27
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Neopixel blink sketch example
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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 | |
| /* ... | |
| /* Blink the single neopixel | |
| /* Wasn't in it examples? | |
| /* Project Crew™ 8/2/2025 | |
| */ | |
| #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 8 // On Trinket or Gemma, suggest changing this to 1 | |
| // How many NeoPixels are attached to the Arduino? | |
| #define NUMPIXELS 2 // Why it needs to be 2 | |
| // 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 for "on" | |
| pixels.setBrightness(0); // Jacket off | |
| delay(DELAYVAL); // Pause for "off" | |
| pixels.setBrightness(255); // Jacket on | |
| } | |
| } |
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