Arduino programming fagcafe - Levende lamper

by Daniel Davidsen

access to presentation:
PowerPoint file

PDF file

access to files:
Demo example

Laser cut files

Here is the presentation but as a blog post, not to be followed but for easy to scroll and look.

Download and install Arduino Download link: https://www.arduino.cc/en/software
Add “FastLED” library
Settings: Turn on “editor quick suggestions”

First code - Blink test

void setup() {  
 // initialize digital pin LED_BUILTIN as an output.
 pinMode(LED_BUILTIN, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {  
 digitalWrite(LED_BUILTIN, HIGH);  // turn the LED on (HIGH is the voltage level)
 delay(1000);                      // wait for a second
 digitalWrite(LED_BUILTIN, LOW);   // turn the LED off by making the voltage LOW
 delay(1000);                      // wait for a second
}

Blink and print over USB

void setup() {  
 Serial.begin(9600);            //setup USB port for communication
 pinMode(LED_BUILTIN, OUTPUT);  // initialize digital pin LED_BUILTIN as an output.
}

// the loop function runs over and over again forever
void loop() {  
 digitalWrite(LED_BUILTIN, HIGH);  // turn the LED on (HIGH is the voltage level)
 Serial.println("ON");             // Print on serial "ON"
 delay(1000);                      // wait for a second
 digitalWrite(LED_BUILTIN, LOW);   // turn the LED off by making the voltage LOW
 Serial.println("OFF");             // print on Serial "OFF"
 delay(1000);                      // wait for a second
}

Blink with LED string

#include <FastLED.h>

#define NUM_LEDS 1
#define DATA_PIN 3

CRGB leds[NUM_LEDS];    // Define the array of leds

void setup() {  
   FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);  // GRB ordering is assumed
}

void loop() {  
 leds[0] = CRGB::Red;    // Set the LED 0 red
 FastLED.show();         // Push the state to all LEDs
 delay(1000);            // Pause for 1 sec       

 leds[0] = CRGB::Black;  // Set the LED 0 red
 FastLED.show();         // Push the state to all LEDs
 delay(1000);             // Pause for 1 sec
}

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Turn all LED’s Red

void loop() {  
 leds[0] = CRGB::Red;
 leds[1] = CRGB::Red;
 leds[2] = CRGB::Red;
 leds[3] = CRGB::Red;
 leds[4] = CRGB::Red;
 (...)
 leds[23] = CRGB::Red;
 leds[24] = CRGB::Red;
 FastLED.show();
}

Turn all LED’s blue with loop

void loop() {  
 counter = counter + 1;    //increase number with + 1
 Serial.println(counter);
 leds[conuter] = CRGB::Blue;
 FastLED.show();
 delay(1000);
}

/*
This code will work but is very bad as number will increase to a very high number ( and sooner or later loop over to zero again)  
*/

Turn all LED’s blue with 'for-loop'

void loop() {  
 for (int counter = 0; counter < NUM_LEDS; counter++) {
   Serial.println(counter);
   leds[conuter] = CRGB::Red;
   FastLED.show();
   delay(1000);
 }

Now have some fun with the demoreel example there has been modified to only use function you have learned doing this workshop.
Demo example