Published May 30, 2017 © GPL3+

Propeller Display

This propeller display is mechanically scanned and displays the characters in digital format. Made from scrap it can be used anywhere.

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Things used in this project

Hardware components

Arduino UNO

5 mm LED: Red

propeller display pcb

IR transreceiver

12 MHz Crystal

Resistor 330 ohm

Resistor 10k ohm

Coin Cell Battery CR2032

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

Hot glue gun (generic)

Digilent Mastech MS8217 Autorange Digital Multimeter

Schematics

Code

propeller display arduino code

//made by shubham devkar
int l1=5;
int l2=6;
int l3=7;
int l4=8;
int l5=9;
int l6=10;
int l7=11;
int l8=12;
void setup() 
{
  Serial.begin(9600);
  pinMode(l1, OUTPUT);
  pinMode(l2, OUTPUT);
  pinMode(l3, OUTPUT);
  pinMode(l4, OUTPUT);
  pinMode(l5, OUTPUT);
  pinMode(l6, OUTPUT);
  pinMode(l7, OUTPUT);
  pinMode(l8, OUTPUT);
}
void loop() 
{
  int sensorValue = analogRead(A0);
  Serial.println(sensorValue);    
   if (sensorValue < 100)
    {
     digitalWrite(l1, LOW);  //TO PRINT "w" 
  digitalWrite(l2,   LOW); 
  digitalWrite(l3, LOW); 
  digitalWrite(l4, LOW);  
  digitalWrite(l8, LOW);
  digitalWrite(l6, HIGH); 
  digitalWrite(l7, LOW);  
  digitalWrite(l5, LOW); 
  delay(2);
  digitalWrite(l1, HIGH);  
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, LOW);  
  digitalWrite(l8, HIGH);
  delay(2);
  digitalWrite(l1, LOW);  
  digitalWrite(l2, LOW); 
  digitalWrite(l3, LOW); 
  digitalWrite(l4, LOW);  
  digitalWrite(l8, LOW); 
  delay(2);
  
  digitalWrite(l1, HIGH); // SPACE 
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, HIGH);
  delay(3);

 digitalWrite(l1, LOW);  //TO PRINT "E"
  digitalWrite(l2, LOW); 
  digitalWrite(l3, LOW); 
  digitalWrite(l4, LOW);  
  digitalWrite(l8, LOW); 
  delay(2);
  digitalWrite(l1, LOW);  
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, LOW); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, LOW);
  delay(2);
  digitalWrite(l1, LOW);  
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, LOW); 
  delay(2);
  digitalWrite(l1, HIGH); // SPACE 
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, HIGH); 
  delay(3);
  
  digitalWrite(l1, LOW);  //TO PRINT "L"
  digitalWrite(l2, LOW); 
  digitalWrite(l3, LOW); 
  digitalWrite(l4, LOW);  
  digitalWrite(l8, LOW); 
  delay(2);
  digitalWrite(l1, HIGH);  
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, LOW); 
  delay(2);
  digitalWrite(l1, HIGH);  
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, LOW);
  delay(2);
  
  digitalWrite(l1, HIGH); // SPACE 
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, HIGH);
  delay(3);
  
  digitalWrite(l1, HIGH);  //TO PRINT "-"
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, LOW); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, HIGH); 
  delay(2);
  digitalWrite(l1, HIGH);
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, LOW); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, HIGH); 
  delay(2);
  digitalWrite(l1, HIGH);//SPACE
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, HIGH); 
  delay(2);
 digitalWrite(l1, LOW);  //TO PRINT "C"
  digitalWrite(l2, LOW); 
  digitalWrite(l3, LOW); 
  digitalWrite(l4, LOW);  
  digitalWrite(l8, LOW); 
  delay(2);
  digitalWrite(l1, LOW);  
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, LOW);
  delay(2);
  digitalWrite(l1, LOW);  
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, LOW); 
  delay(2);
  digitalWrite(l1, HIGH); // SPACE 
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, HIGH); 
  delay(3);
 digitalWrite(l1, LOW);  //TO PRINT "O"
  digitalWrite(l2, LOW); 
  digitalWrite(l3, LOW); 
  digitalWrite(l4, LOW);  
  digitalWrite(l8, LOW); 
  delay(2);
  digitalWrite(l1, LOW);  
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, LOW);
  delay(2);
  digitalWrite(l1, LOW);  
  digitalWrite(l2, LOW); 
  digitalWrite(l3, LOW); 
  digitalWrite(l4, LOW);  
  digitalWrite(l8, LOW); 
  delay(2);
  digitalWrite(l1, HIGH); // SPACE 
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, HIGH); 
  delay(3);
 digitalWrite(l1, LOW);  //TO PRINT "M"
  digitalWrite(l2, LOW); 
  digitalWrite(l3, LOW); 
  digitalWrite(l4, LOW);  
  digitalWrite(l8, LOW); 
  delay(2);
  digitalWrite(l1, HIGH);  
  digitalWrite(l2, LOW); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, HIGH);
  delay(2);
  digitalWrite(l1, LOW);  
  digitalWrite(l2, LOW); 
  digitalWrite(l3, LOW); 
  digitalWrite(l4, LOW);  
  digitalWrite(l8, LOW); 
  delay(2);
  digitalWrite(l1, HIGH); // SPACE 
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, HIGH); 
  delay(3);
 digitalWrite(l1, LOW);  //TO PRINT "E"
  digitalWrite(l2, LOW); 
  digitalWrite(l3, LOW); 
  digitalWrite(l4, LOW);  
  digitalWrite(l8, LOW); 
  delay(2);
  digitalWrite(l1, LOW);  
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, LOW); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, LOW);
  delay(2);
  digitalWrite(l1, LOW);  
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, LOW); 
  delay(2);
  digitalWrite(l1, HIGH); // SPACE 
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l8, HIGH); 
  delay(3); 
  
    } 
    else
    {
  digitalWrite(l1, HIGH); // SPACE 
  digitalWrite(l2, HIGH); 
  digitalWrite(l3, HIGH); 
  digitalWrite(l4, HIGH);  
  digitalWrite(l5, HIGH);
  digitalWrite(l6, HIGH); 
  digitalWrite(l7, HIGH);  
  digitalWrite(l8, HIGH); 
    }
}

Credits

Shubham Devkar

13 projects • 14 followers

Experienced Electronics engineer, excellent at PCB Designing, control circuit development.circuit designing, hands-on experience with MCUs