Gerrit van Zeijts
Published © GPL3+

Laserbeam-Figures

This instruction will show you a simple construction to use a controlled laser beam for projecting nice figures on a wall.

IntermediateFull instructions provided15 hours2,923
Laserbeam-Figures

Things used in this project

Hardware components

Arduino UNO & Genuino UNO
Arduino UNO & Genuino UNO
Any other microcontroller will do, but a minimum of 3 PWM-outputs are required.
×1
DC motor (generic)
12 - 24 Volt. from demolished printers
×3
Laser Diode, 2 Pins
Laser Diode, 2 Pins
Rating 5mW. 650nm
×1

Story

Read more

Custom parts and enclosures

Total construction of mounting plate

LaserBeam3.mp4

Video example figures

IMG_0556.jpg

Example of figure

IMG_0557.jpg

Example of figure

Principle Laserbeam.jpg

Principle of the system

IMG_5433.jpg

Detail of mirror on motor

LaserBeamFigures

Some Figures

Schematics

LaserBeam-SchemeH

Wiring Diagram

Code

LaserBeam.ino

Arduino
// LaserBeam with 3 Mirrors on 3 Electric motors
// Declarations :
int DataIn;
int PosSelector;    // Position of Selector (16-positions)
int Figure;
int LoopCounter;    // Determines time duration off 1 figure during "Show01()"
int Sm1, Sm2, Sm3;  // Speed motor 1 , 2 en 3 (=Output of PWM)
int Pin4 = 4;       // One of the 4 inputs for the Selector
int Pin5 = 5;       // One of the 4 inputs for the Selector
int Pin6 = 6;       // One of the 4 inputs for the Selector
int Pin7 = 7;       // One of the 4 inputs for the Selector
int Motor1 = 9;     // PWM-output for Motor
int Motor2 = 11;    // PWM-output for Motor
int Motor3 = 10;    // PWM-output for Motor
int Laser=12;       // Digital output for Laser diode  

void setup()
{ Serial.begin(9600);      // Preparation Serial Communication 
  pinMode(Pin4, INPUT); digitalWrite (Pin4, HIGH);  // Internal Pullup
  pinMode(Pin5, INPUT); digitalWrite (Pin5, HIGH);  // Internal Pullup
  pinMode(Pin6, INPUT); digitalWrite (Pin6, HIGH);  // Internal Pullup
  pinMode(Pin7, INPUT); digitalWrite (Pin7, HIGH);  // Internal Pullup
  digitalWrite (Laser, HIGH);                       // Laser always on !!!
  pinMode(Motor1, OUTPUT);
  pinMode(Motor2, OUTPUT);
  pinMode(Motor3, OUTPUT);  
  pinMode(Laser, OUTPUT);  
  LoopCounter=0;
  Figure=999;
  PosSelector=0;}

void loop()
{   ReadDigitalInputs();
//    Display();                 // Used only for making nice Figures 
    switch (PosSelector) 
   { case 0: ReadPotmeters(); break;
     case 1: Figure01(); break;  
     case 2: Figure02(); break;
     case 3: Figure03(); break;
     case 4: Figure04(); break;
     case 5: Figure05(); break;
     case 6: Figure06(); break; 
     case 7: Figure07(); break;    
     case 8: Figure08(); break;  
     case 9: Figure09(); break;
     case 10: Figure10(); break;  
     case 11: Figure11(); break;
     case 12: Figure12(); break;  
     case 13: Figure13(); break;
     default: Show01(); break;}}  // Positions 14 en 15 give all figures !!!!

void Show01()
{    LoopCounter++;
//     Display();
     delay(500);    // with delay(500) avery Figure takes 5 seconden (without Display())
     if (LoopCounter>0)  {if (LoopCounter<11){Figure01();}}  //  
     if (LoopCounter>10) {if (LoopCounter<21){Figure02();}}  //  
     if (LoopCounter>20) {if (LoopCounter<31){Figure03();}}  //     
     if (LoopCounter>30) {if (LoopCounter<41){Figure04();}}  // 
     if (LoopCounter>40) {if (LoopCounter<51){Figure05();}}  //      
     if (LoopCounter>50) {if (LoopCounter<61){Figure06();}}  // 
     if (LoopCounter>60) {if (LoopCounter<71){Figure07();}}  // 
     if (LoopCounter>70)  {if (LoopCounter<81){Figure08();}} //  
     if (LoopCounter>80) {if (LoopCounter<91){Figure09();}}  //  
     if (LoopCounter>90) {if (LoopCounter<101){Figure10();}}  //     
     if (LoopCounter>100) {if (LoopCounter<111){Figure11();}} // 
     if (LoopCounter>110) {if (LoopCounter<121){Figure12();}} //      
     if (LoopCounter>120) {if (LoopCounter<131){Figure13();}} // 
     if (LoopCounter>130) {LoopCounter=0;}} 
          
void Figure01()  // Rotating (small) stick
{    Figure=01; 
     Sm1=171; Sm2=38; Sm3=253;
      analogWrite(Motor1, Sm1);
      analogWrite(Motor2, Sm2);
      analogWrite(Motor3, Sm3);}

void Figure02()   // Propellor 4 blades
{     Figure=02; 
      Sm1=62; Sm2=30; Sm3=255;
      analogWrite(Motor1, Sm1);
      analogWrite(Motor2, Sm2);  
      analogWrite(Motor3, Sm3);} 

void Figure03()   // Rotating dot
{    Figure=03; 
     Sm1=33; Sm2=0; Sm3=0;
     analogWrite(Motor1, Sm1);
     analogWrite(Motor2, Sm2);
     analogWrite(Motor3, Sm3);}      

void Figure04()   // Ovals Changing in size
{    Figure=04; 
     Sm1=199; Sm2=212; Sm3=202;    
     analogWrite(Motor1,Sm1);
     analogWrite(Motor2, Sm2);
     analogWrite(Motor3, Sm3);}  

void Figure05()  // Rotating Ovals
{    Figure=05; 
     Sm1=53; Sm2=255; Sm3=255;    
     analogWrite(Motor1,Sm1);
     analogWrite(Motor2, Sm2);
     analogWrite(Motor3, Sm3);} 

void Figure06()  // Flower 5 petals
{    Figure=06; 
     Sm1=138; Sm2=0; Sm3=57;    
     analogWrite(Motor1,Sm1);
     analogWrite(Motor2, Sm2);
     analogWrite(Motor3, Sm3);} 
     
void Figure07()  //  Square stretched
{    Figure=07; 
     Sm1=48; Sm2=42; Sm3=0;    
     analogWrite(Motor1,Sm1);
     analogWrite(Motor2, Sm2);
     analogWrite(Motor3, Sm3);} 
               
void Figure08()   // Rotating Circles
{    Figure=8; 
     Sm1=255; Sm2=255; Sm3=255;    
     analogWrite(Motor1,Sm1);
     analogWrite(Motor2, Sm2); 
     analogWrite(Motor3, Sm3);} 
     
void Figure09()   // Circles Changing in size
{    Figure=9;     
     Sm1=0; Sm2=226; Sm3=255;     
     analogWrite(Motor1,Sm1);
     analogWrite(Motor2, Sm2); 
     analogWrite(Motor3, Sm3);} 
               
void Figure10()   // Circle with internal circle
{    Figure=10; 
     Sm1=0; Sm2=52; Sm3=255;    
     analogWrite(Motor1,Sm1);
     analogWrite(Motor2, Sm2); 
     analogWrite(Motor3, Sm3);} 
     
void Figure11()   // Rotating Apple
{    Figure=11;     
     Sm1=0; Sm2=77; Sm3=255;     
     analogWrite(Motor1,Sm1);
     analogWrite(Motor2, Sm2); 
     analogWrite(Motor3, Sm3);}  
               
void Figure12()   // Rotating Circles
{    Figure=12; 
     Sm1=0; Sm2=42; Sm3=255;    
     analogWrite(Motor1,Sm1);
     analogWrite(Motor2, Sm2); 
     analogWrite(Motor3, Sm3);} 
     
void Figure13()   // Star
{    Figure=13;     
     Sm1=255; Sm2=105; Sm3=0;     
     analogWrite(Motor1,Sm1);
     analogWrite(Motor2, Sm2); 
     analogWrite(Motor3, Sm3);}     

void ReadDigitalInputs()  // Read 4 Switches. PosSelector has values from 0 to 15
{  PosSelector=0;
   DataIn=digitalRead(Pin4); if (DataIn==LOW){PosSelector=1;}            // 
   DataIn=digitalRead(Pin5); if (DataIn==LOW){PosSelector=PosSelector+2;}
   DataIn=digitalRead(Pin6); if (DataIn==LOW){PosSelector=PosSelector+4;}
   DataIn=digitalRead(Pin7); if (DataIn==LOW){PosSelector=PosSelector+8;}}

void Display()
{   Serial.print("Motor 1 : "); 
    Serial.print(Sm1);                  // Speed of Motor (= output of PWM)
    Serial.print("   Motor 2 : ");
    Serial.print(Sm2);                  // Speed of Motor (= output of PWM)
    Serial.print("   Motor 3 : ");
    Serial.print(Sm3);                  // Speed of Motor (= output of PWM)    
    Serial.print("   LoopCounter : "); 
    Serial.print(LoopCounter); 
    Serial.print("   PosSelector= ");
    Serial.println(PosSelector); 
//    Serial.print("   Figure : ");
//    Serial.println(Figure);
}
    
void ReadPotmeters()  // Figure15
{   Sm1=analogRead(4);  Sm1=Sm1/4;     
    analogWrite(Motor1, Sm1);
    Sm2=analogRead(1);  Sm2=Sm2/4;      
    analogWrite(Motor2, Sm2);        
    Sm3=analogRead(3);  Sm3=Sm3/4;     
    analogWrite(Motor3, Sm3);} 

Credits

Gerrit van Zeijts

Gerrit van Zeijts

2 projects • 3 followers
Retired from Jobs in Instrumentation and building Pilot Plants. Hobbyist with Arduino and Programming Visual Basic

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