Electronic Output Devices!

This week we worked with electronic output devices! I personally worked with a servo motor and led lights. Here are how we will approach this week:

  • hardware
  • wiring
  • libraries
  • code
  • execution

Hardware

THis week you will need the following:

  1. jumper cables
  2. servo motor
  3. servo rotation attachment
  4. led strip
  5. sautering equipment/ setup After collecting the resources listed you will need to suter wires onto the led strip. You will sauter a 3k Ohm resistor to the middle slot of the led strip, a red wire to the 5v , and a black wire to the ground. Also you will want to connect jumper cables to the servo motor it doesn’t really matter which one you connect to which one as long as GND goes to GND 5v to 5v and vcc to vcc.

Libraries

After sorting out your hardware you will need to download libraries. For the servo motor your ardunio ide will likely already have the servo library included so just select it and include it in your sketch. For the led, however, you will have to go to manage libraries and downlad the adafruit neopixel library. this is a relatively small library. After this you will need to connect the wires you sautered to the arduino either directly or over the protoboard.

Basically, this will help my final project by moving the sonar reader around 180 degrees this will allow me to run a 180 degree scanner and avoid all obstacles.

Code

#include <Servo.h> // Include the Servo library #include <Servo.h> // Declare the Servo pin int servoPin = 3; // Create a servo object Servo Servo1; void setup() { // We need to attach the servo to the used pin number Servo1.attach(servoPin); } void loop(){ Servo1.write(0); delay(500); Servo1.write(180); delay(500); } &lt;/xmp&gt; THis is the code for the servo. Below is the code for the led lights: <xmp> #include <Adafruit_NeoPixel.h> #ifdef __AVR__ #include &lt;avr/power.h&gt; // Required for 16 MHz Adafruit Trinket #endif // Which pin on the Arduino is connected to the NeoPixels? // On a Trinket or Gemma we suggest changing this to 1: #define LED_PIN 6 // How many NeoPixels are attached to the Arduino? #define LED_COUNT 8 // Declare our NeoPixel strip object: Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800); // Argument 1 = Number of pixels in NeoPixel strip // Argument 2 = Arduino pin number (most are valid) // Argument 3 = Pixel type flags, add together as needed: // NEO_KHZ800 800 KHz bitstream (most NeoPixel products w/WS2812 LEDs) // NEO_KHZ400 400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers) // NEO_GRB Pixels are wired for GRB bitstream (most NeoPixel products) // NEO_RGB Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2) // NEO_RGBW Pixels are wired for RGBW bitstream (NeoPixel RGBW products) // setup() function -- runs once at startup -------------------------------- 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__) &amp;&amp; (F_CPU == 16000000) clock_prescale_set(clock_div_1); #endif // END of Trinket-specific code. strip.begin(); // INITIALIZE NeoPixel strip object (REQUIRED) strip.show(); // Turn OFF all pixels ASAP strip.setBrightness(50); // Set BRIGHTNESS to about 1/5 (max = 255) } // loop() function -- runs repeatedly as long as board is on --------------- void loop() { // Fill along the length of the strip in various colors... // colorWipe(strip.Color(255, 0, 0), 100); // Red //colorWipe(strip.Color( 0, 255, 0), 100); // Green colorWipe(strip.Color( 0, 0, 255), 1000); // Blue // Do a theater marquee effect in various colors... theaterChase(strip.Color(127, 127, 127), 100); // White, half brightness theaterChase(strip.Color(127, 0, 0), 100); // Red, half brightness theaterChase(strip.Color( 0, 0, 127), 100); // Blue, half brightness //rainbow(10); // Flowing rainbow cycle along the whole strip //theaterChaseRainbow(50); // Rainbow-enhanced theaterChase variant } // Some functions of our own for creating animated effects ----------------- // Fill strip pixels one after another with a color. Strip is NOT cleared // first; anything there will be covered pixel by pixel. Pass in color // (as a single 'packed' 32-bit value, which you can get by calling // strip.Color(red, green, blue) as shown in the loop() function above), // and a delay time (in milliseconds) between pixels. void colorWipe(uint32_t color, int wait) { for(int i=0; i&lt;strip.numPixels(); i++) { // For each pixel in strip... strip.setPixelColor(i, color); // Set pixel's color (in RAM) strip.show(); // Update strip to match delay(wait); // Pause for a moment } } // Theater-marquee-style chasing lights. Pass in a color (32-bit value, // a la strip.Color(r,g,b) as mentioned above), and a delay time (in ms) // between frames. void theaterChase(uint32_t color, int wait) { for(int a=0; a&lt;10; a++) { // Repeat 10 times... for(int b=0; b&lt;3; b++) { // 'b' counts from 0 to 2... strip.clear(); // Set all pixels in RAM to 0 (off) // 'c' counts up from 'b' to end of strip in steps of 3... for(int c=b; c&lt;strip.numPixels(); c += 3) { strip.setPixelColor(c, color); // Set pixel 'c' to value 'color' } strip.show(); // Update strip with new contents delay(wait); // Pause for a moment } } } // Rainbow cycle along whole strip. Pass delay time (in ms) between frames. void rainbow(int wait) { // Hue of first pixel runs 5 complete loops through the color wheel. // Color wheel has a range of 65536 but it's OK if we roll over, so // just count from 0 to 5*65536. Adding 256 to firstPixelHue each time // means we'll make 5*65536/256 = 1280 passes through this outer loop: for(long firstPixelHue = 0; firstPixelHue &lt; 5*65536; firstPixelHue += 256) { for(int i=0; i&lt;strip.numPixels(); i++) { // For each pixel in strip... // Offset pixel hue by an amount to make one full revolution of the // color wheel (range of 65536) along the length of the strip // (strip.numPixels() steps): int pixelHue = firstPixelHue + (i * 65536L / strip.numPixels()); // strip.ColorHSV() can take 1 or 3 arguments: a hue (0 to 65535) or // optionally add saturation and value (brightness) (each 0 to 255). // Here we're using just the single-argument hue variant. The result // is passed through strip.gamma32() to provide 'truer' colors // before assigning to each pixel: strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue))); } strip.show(); // Update strip with new contents delay(wait); // Pause for a moment } } // Rainbow-enhanced theater marquee. Pass delay time (in ms) between frames. void theaterChaseRainbow(int wait) { int firstPixelHue = 0; // First pixel starts at red (hue 0) for(int a=0; a&lt;30; a++) { // Repeat 30 times... for(int b=0; b&lt;3; b++) { // 'b' counts from 0 to 2... strip.clear(); // Set all pixels in RAM to 0 (off) // 'c' counts up from 'b' to end of strip in increments of 3... for(int c=b; c&lt;strip.numPixels(); c += 3) { // hue of pixel 'c' is offset by an amount to make one full // revolution of the color wheel (range 65536) along the length // of the strip (strip.numPixels() steps): int hue = firstPixelHue + c * 65536L / strip.numPixels(); uint32_t color = strip.gamma32(strip.ColorHSV(hue)); // hue -&gt; RGB strip.setPixelColor(c, color); // Set pixel 'c' to value 'color' } strip.show(); // Update strip with new contents delay(wait); // Pause for a moment firstPixelHue += 65536 / 90; // One cycle of color wheel over 90 frames } } } &lt;/xmp&gt; <video width="955" height="541" controls=""> <source src="led.MOV" type="video/mp4" /> </video> <video width="955" height="541" controls=""> <source src="servo.MOV" type="video/mp4" /> </video> </Adafruit_NeoPixel.h>