Published October 8, 2017 © GPL3+

RGB LED Lamp

Interactive RGB lamp. Made with pupils. We use syringes to change color.

IntermediateShowcase (no instructions)5 hours5,336

Things used in this project

Hardware components

Arduino Mini 05

You can use any arduino

RobotGeek Slider

Any slide potentiometer of 10k.

Transistor BD139

or similar NPN transistor

SparkFun LilyPad Rainbow LED (strip of 7 colors)

LED strip RGB

SparkFun Snappable Protoboard

It's better if you use a printed board

Software apps and online services

Arduino IDE

Story

My student and I built an interactive RGB lamp.

You can change the color of the lamp by placing a syringe with colored water into desired position. For each color we use one syringe (red, green, blue). Plunger of the first syringe moves the plunger of the second syringe, and it moves a linear potentiometer. Therefore, the voltages are changed to three analog inputs of arduino.

You can take a lampshade with some old lamps or make it from the sturdy wire and transparent material.

The syringe lamp.ino

int led1 = 9;
int led2 =10;
int led3 =11;

int osvetljaj1 = 0;
int osvetljaj2 = 0;
int osvetljaj3 = 0;

void setup() 
    {
    Serial.begin(9600);
    pinMode(led1, OUTPUT);
    pinMode(led2, OUTPUT);
    pinMode(led3, OUTPUT);
    }   
   

void loop() 
    {
    int senzorNivo1 = analogRead(A0);
    int senzorNivo2 = analogRead(A1);
    int senzorNivo3 = analogRead(A2);

    osvetljaj1 =  (senzorNivo1 + 100) /4;  //Zavisi od duzine sprica i duzine potenciometra
    osvetljaj2 =  (senzorNivo2 + 100) /4;
    osvetljaj3 =  (senzorNivo3 + 100) /4;
 
    analogWrite(led1, 255 - osvetljaj1);
    analogWrite(led2, 255 - osvetljaj2);
    analogWrite(led3, 255 - osvetljaj3);
 
    Serial.print(senzorNivo1);
    Serial.print("    ");
    Serial.print(senzorNivo2);
    Serial.print("     ");
    Serial.println(senzorNivo3);
    delay(100);
    }