Double Transducer: Distance to Heat

Final images

Detail photos

Final project movies

Tippi Li's Double Transducer

In the video, I altered the input of linear distance by moving my hands away and closer to the ultrasonic ranger (a sensor that measures its distance to any objects, in this case my hand). When the hand is detects closer to the sensor, the RGB LED and bulb shines brighter. Conversely, when the hand is detects closer to the sensor, the RGB LED and bulb dims.  Then I pressed the button to skip the middle step (color). As shown in the video, the distance to the ultrasonic ranger is mapped directly to the brightness of the bulb. Finally, I covered the color sensor with my fingers and altered the input of distance, the brightness of the bulb did not change. The bulb changed brightness when I uncovered the color sensor again, showing that the middle step is working properly. 

In this video, I demonstrate the relationship between the red-detecting ultrasonic ranger, the bottom of the three, the LED ring, and the incandescent bulb. The closer I move my hand to the ultrasonic ranger, the brighter the LED ring shines red. The color sensor then picks up on the amount of red emitted by the LED ring and maps that to a specific bulb brightness. The more red detected, the brighter the bulb. If i were to hold my had over the top (blue) ultrasonic ranger, the LED ring shines blue, but the incandescent bulb should shine minimally, if at all.

Progress images

Functional block diagram and electrical schematic

Code

/*

   Project Title: Double Transducer: Distance to Heat

   Authors: Allison Feldman and Tippi Li

   Description: The first transducer uses an ultrasonic ranger to detect the distance of any object to the machine.

   When it detects something getting closer, it adjusts the RGB LED to emit a brighter color, indicating shorter

   distances with brighter colors. Conversely, when it detects something getting further away, the RGB LED changes

   to a color with lower intensity, reflecting longer distances with dimmer colors.

   Arduino | Role | Details

   -------------------------

   2       input    BUTTONPIN

   3       input    NEORINGPIN

   5       output   MOSFETPIN

   6       output   Trig Pin

   7       output   Echo Pin

   8       output   Trig Pin

   9       output   Echo Pin

   11      output   Trig Pin

   12      output   Echo Pin

*/

#include <NewPing.h>           // Ultrasonic Ranger

#include <Adafruit_NeoPixel.h> // Neo Pixel Ring

#include <Arduino_APDS9960.h>  // Color Sensor

#include <Wire.h>

#include <LiquidCrystal_I2C.h> // LCD Screen

#ifdef __AVR__

#include <avr/power.h>         // Required for 16 MHz Adafruit Trinket

#endif

//---------------------------------------------------

#define SONAR_NUM 3

#define MAX_DISTANCE 40 // Maximum distance we want to ping for (in centimeters). Maximum sensor distance is rated at 400-500cm.

NewPing sonar[SONAR_NUM] = {   // Sensor object array.

 NewPing(6,7, MAX_DISTANCE), // Each sensor's trigger pin, echo pin, and max distance to ping.

 NewPing(8,9, MAX_DISTANCE),

 NewPing(11,12, MAX_DISTANCE)

};

//-------------------------

#define NEORINGPIN 3

#define NUMPIXELS 12

Adafruit_NeoPixel ring(NUMPIXELS, NEORINGPIN, NEO_GRB + NEO_KHZ800);

//-------------------------

#define MOSFETPIN 5 // Mosfet: to control the brightness of bulb

#define BUTTONPIN 2 // Push Button: skip middle step(color)

//-------------------------

LiquidCrystal_I2C screen(0x27, 16, 2); // Display I/O and middle step value

//-------------------------

void setup() {

 Serial.begin(9600);

 ring.begin();        

 ring.show();           

 ring.setBrightness(50);

 while (!Serial);

 if (!APDS.begin()) {

   Serial.println("Error initializing APDS-9960 sensor.");

 }

// initialize screen

 screen.init();

 screen.backlight();

}

void loop() {

 //Ultrasonic Ranger

 delay(50);

 int dist_r = sonar[0].ping_cm();

 int dist_g = sonar[1].ping_cm();

 int dist_b = sonar[2].ping_cm();

 int display_r = map(dist_r,0,40,255,0);

 int display_g = 0;

 int display_b = 0;

  //neopixel ring: produce color

 for(int i = 0; i < 12; i++){

   ring.setPixelColor(i, display_r, display_g, display_b);

 }

 ring.show();

 //color sensor: read color

 while (!APDS.colorAvailable()) {

   delay(2);

 }

 int read_r, read_g, read_b;

 APDS.readColor(read_r, read_g, read_b);

 int sensor_r = map(read_r,0,2600,0,255);

 int sensor_g = 0;

 int sensor_b = 0;

 //color to heat

 int buttonVal = digitalRead(BUTTONPIN);

 int brightness;

// button option to skip middle step(color) and turn distance into heat directly

 if(buttonVal == LOW){

   brightness = map(dist_r,0,30,50,1000);

 } else {

   brightness = map(sensor_r,0,255,50,1000);

 }

 analogWrite(MOSFETPIN,brightness);

 // LCD Display

 screen.home();

 screen.clear();

 screen.print("i:");

 screen.print(dist_r);

 int midIn = map(display_r, 0,255,0,99);

 screen.setCursor(6, 0);

 screen.print("m:");

 screen.print(midIn);

 int mid_Out = map(sensor_r, 0,255,0,99);

 screen.setCursor(8, 1);

 screen.print(mid_Out);

 int b = map(brightness, 50,1000,0,99);

 screen.setCursor(12, 1);

 screen.print("o:");

 screen.print(b);

 delay(4);

}