POV Clock/Display Making

This Project we are going how to make a cool POV clock in a simple way.

This Project we are going how to make a cool POV clock in a simple way. POV stands for persistence of vision. It is a kind of optical illusion where a visual image seems to persist even when the rays of light from it cease to enter our eyes which makes it awesome! You can display any text or image that you want to with it.

• What is POV?

Persistence of Vision, or POV, occurs when a visual image seems to persist continuously when a stream of light is repeatedly interrupted for very brief instances and does not enter our eyes during those durations

• How Does POV Work?

The human eye cannot process more than 10-12 images per second. When a series of images more is presented in quick succession, it gives us the illusion that the images are in motion.

For making the LED POV Clock/Display, we are going to use

• PCB
• Arduino Nano
• 9v Battery with Connector
• 7805 Regulator IC (9-12V to 5v)
• LEDs ( Blue or Red )
• Resistor 220 ohm
• On-Off Switch
• Dc Motor

Therefore, case you want your own PCB, you can obtain through this link on PCBWay.com. You can also order good quality PCBS from PCBWay.com at low cost. In addition to the standard pcbs, we could also support advanced Pcbs, FPC/rigid -flex Pcbs, rapid-rpototyping and other related services that could meet your needs to the most extent.

PCB order steps on PCBWay:

1. Visit the website: www.pcbway.com
2. Click PCB Instant QuoteClick
3. quick-order PCB Upload the gerber file by clicking "+Add Gerber File" and wait until the gerber file is finished
4. uploading Set the PCB specifications as you wish, starting from the number of PCBs, the number of layers, thickness, color and others. After that, look at the left, it will display the estimated cost
5. processing time and delivery service selected.
6. Click Save to cart

• I have used here is Blue LEDs . You can use a Red LEDs if you want

• 7805 Regulator IC we are using here to convert 9v to 5 volt. Arduino Nano run on 5 volt.

1. Connect Arduino Nano on PC
2. Open Arduino IDE (Software)
3. Then Go To Tools>Board>Select Arduino Nano
4. Select Correct Port
5. Then Upload Code Below

#include <Time.h>
 include <TimeLib.h>
  const int LEDpins[] = {9,8,7,6,5,4,3,2};
  int rows= 8;		  
   const int charHeight = 8;
   const int charWidth = 5;
   const unsigned char font[95][5] = {
         {0x00,0x00,0x00,0x00,0x00},   //   0x20 32
         {0x00,0x00,0x6f,0x00,0x00},   // ! 0x21 33
         {0x00,0x07,0x00,0x07,0x00},   // " 0x22 34
         {0x14,0x7f,0x14,0x7f,0x14},   // # 0x23 35
         {0x00,0x07,0x04,0x1e,0x00},   // $ 0x24 36
         {0x23,0x13,0x08,0x64,0x62},   // % 0x25 37
         {0x36,0x49,0x56,0x20,0x50},   // & 0x26 38
         {0x00,0x00,0x07,0x00,0x00},   // ' 0x27 39
         {0x00,0x1c,0x22,0x41,0x00},   // ( 0x28 40
         {0x00,0x41,0x22,0x1c,0x00},   // ) 0x29 41
         {0x14,0x08,0x3e,0x08,0x14},   // * 0x2a 42
         {0x08,0x08,0x3e,0x08,0x08},   // + 0x2b 43
         {0x00,0x50,0x30,0x00,0x00},   // , 0x2c 44
         {0x08,0x08,0x08,0x08,0x08},   // - 0x2d 45
         {0x00,0x60,0x60,0x00,0x00},   // . 0x2e 46
         {0x20,0x10,0x08,0x04,0x02},   // / 0x2f 47
         {0x3e,0x51,0x49,0x45,0x3e},   // 0 0x30 48
         {0x00,0x42,0x7f,0x40,0x00},   // 1 0x31 49
         {0x42,0x61,0x51,0x49,0x46},   // 2 0x32 50
         {0x21,0x41,0x45,0x4b,0x31},   // 3 0x33 51
         {0x18,0x14,0x12,0x7f,0x10},   // 4 0x34 52
         {0x27,0x45,0x45,0x45,0x39},   // 5 0x35 53
         {0x3c,0x4a,0x49,0x49,0x30},   // 6 0x36 54
         {0x01,0x71,0x09,0x05,0x03},   // 7 0x37 55
         {0x36,0x49,0x49,0x49,0x36},   // 8 0x38 56
         {0x06,0x49,0x49,0x29,0x1e},   // 9 0x39 57
         {0x00,0x36,0x36,0x00,0x00},   // : 0x3a 58
         {0x00,0x56,0x36,0x00,0x00},   // ; 0x3b 59
         {0x08,0x14,0x22,0x41,0x00},   // < 0x3c 60
         {0x14,0x14,0x14,0x14,0x14},   // = 0x3d 61
         {0x00,0x41,0x22,0x14,0x08},   // > 0x3e 62
         {0x02,0x01,0x51,0x09,0x06},   // ? 0x3f 63
         {0x3e,0x41,0x5d,0x49,0x4e},   // @ 0x40 64
         {0x7e,0x09,0x09,0x09,0x7e},   // A 0x41 65
         {0x7f,0x49,0x49,0x49,0x36},   // B 0x42 66
         {0x3e,0x41,0x41,0x41,0x22},   // C 0x43 67
         {0x7f,0x41,0x41,0x41,0x3e},   // D 0x44 68
         {0x7f,0x49,0x49,0x49,0x41},   // E 0x45 69
         {0x7f,0x09,0x09,0x09,0x01},   // F 0x46 70
         {0x3e,0x41,0x49,0x49,0x7a},   // G 0x47 71
         {0x7f,0x08,0x08,0x08,0x7f},   // H 0x48 72
         {0x00,0x41,0x7f,0x41,0x00},   // I 0x49 73
         {0x20,0x40,0x41,0x3f,0x01},   // J 0x4a 74
         {0x7f,0x08,0x14,0x22,0x41},   // K 0x4b 75
         {0x7f,0x40,0x40,0x40,0x40},   // L 0x4c 76
         {0x7f,0x02,0x0c,0x02,0x7f},   // M 0x4d 77
         {0x7f,0x04,0x08,0x10,0x7f},   // N 0x4e 78
         {0x3e,0x41,0x41,0x41,0x3e},   // O 0x4f 79
         {0x7f,0x09,0x09,0x09,0x06},   // P 0x50 80
         {0x3e,0x41,0x51,0x21,0x5e},   // Q 0x51 81
         {0x7f,0x09,0x19,0x29,0x46},   // R 0x52 82
         {0x46,0x49,0x49,0x49,0x31},   // S 0x53 83
         {0x01,0x01,0x7f,0x01,0x01},   // T 0x54 84
         {0x3f,0x40,0x40,0x40,0x3f},   // U 0x55 85
         {0x0f,0x30,0x40,0x30,0x0f},   // V 0x56 86
         {0x3f,0x40,0x30,0x40,0x3f},   // W 0x57 87
         {0x63,0x14,0x08,0x14,0x63},   // X 0x58 88
         {0x07,0x08,0x70,0x08,0x07},   // Y 0x59 89
         {0x61,0x51,0x49,0x45,0x43},   // Z 0x5a 90
         {0x3c,0x4a,0x49,0x29,0x1e},   // [ 0x5b 91
         {0x02,0x04,0x08,0x10,0x20},   // \ 0x5c 92
         {0x00,0x41,0x7f,0x00,0x00},   // ] 0x5d 93
         {0x04,0x02,0x01,0x02,0x04},   // ^ 0x5e 94
         {0x40,0x40,0x40,0x40,0x40},   // _ 0x5f 95
         {0x00,0x00,0x03,0x04,0x00},   // ` 0x60 96
         {0x20,0x54,0x54,0x54,0x78},   // a 0x61 97
         {0x7f,0x48,0x44,0x44,0x38},   // b 0x62 98
         {0x38,0x44,0x44,0x44,0x20},   // c 0x63 99
         {0x38,0x44,0x44,0x48,0x7f},   // d 0x64 100
         {0x38,0x54,0x54,0x54,0x18},   // e 0x65 101
         {0x08,0x7e,0x09,0x01,0x02},   // f 0x66 102
         {0x0c,0x52,0x52,0x52,0x3e},   // g 0x67 103
         {0x7f,0x08,0x04,0x04,0x78},   // h 0x68 104
         {0x00,0x44,0x7d,0x40,0x00},   // i 0x69 105
         {0x20,0x40,0x44,0x3d,0x00},   // j 0x6a 106
         {0x00,0x7f,0x10,0x28,0x44},   // k 0x6b 107
         {0x00,0x41,0x7f,0x40,0x00},   // l 0x6c 108
         {0x7c,0x04,0x18,0x04,0x78},   // m 0x6d 109
         {0x7c,0x08,0x04,0x04,0x78},   // n 0x6e 110
         {0x38,0x44,0x44,0x44,0x38},   // o 0x6f 111
         {0x7c,0x14,0x14,0x14,0x08},   // p 0x70 112
         {0x08,0x14,0x14,0x18,0x7c},   // q 0x71 113
         {0x7c,0x08,0x04,0x04,0x08},   // r 0x72 114
         {0x48,0x54,0x54,0x54,0x20},   // s 0x73 115
         {0x04,0x3f,0x44,0x40,0x20},   // t 0x74 116
         {0x3c,0x40,0x40,0x20,0x7c},   // u 0x75 117
         {0x1c,0x20,0x40,0x20,0x1c},   // v 0x76 118
         {0x3c,0x40,0x30,0x40,0x3c},   // w 0x77 119
         {0x44,0x28,0x10,0x28,0x44},   // x 0x78 120
         {0x0c,0x50,0x50,0x50,0x3c},   // y 0x79 121
         {0x44,0x64,0x54,0x4c,0x44},   // z 0x7a 122
         {0x00,0x08,0x36,0x41,0x41},   // { 0x7b 123
         {0x00,0x00,0x7f,0x00,0x00},   // | 0x7c 124
         {0x41,0x41,0x36,0x08,0x00},   // } 0x7d 125
         {0x04,0x02,0x04,0x08,0x04},   // ~ 0x7e 126
     };
  
  

  const int sensorPIN = 10;
  int sensVal;
  int i;
  char textString[] = "        ";
  String tmp_str;
  
  void setup()
  {
    setTime(12,27,30,16,10,2016);
    pinMode(12, OUTPUT);
    pinMode(13, OUTPUT);
    pinMode(11, OUTPUT);
    pinMode(10, INPUT);
    for (i = 0; i < rows; i++)
      pinMode(LEDpins[i], OUTPUT);    
   
  }
  
  void loop()
  {
      
    
    tmp_str=klok();
    tmp_str=tmp_str+" ";
    while(digitalRead(sensorPIN) != 0)
    {
     digitalWrite(13, LOW); 
    }
    digitalWrite(13, HIGH);   
    for (int k=0; k<tmp_str.length(); k++){
      printLetter(tmp_str.charAt(k));
      }
    delay(1);  
    for (int k=sizeof(textString)-1; k>-1; k--){
      printLetterboven(textString[k]);
      }  
  }
  
  String klok(){
    String result;
    String str1;
    String str2;
    String str3;
    if (hour() < 10)
      str1 = "0"+String(hour());
    else
      str1 = String(hour());
    if (minute() < 10)
      str2 = "0"+String(minute());
    else
      str2 = String(minute());
    if (second() < 10)
      str3 = "0"+String(second());
    else
      str3 = String(second());
    result = str1+":"+str2+":"+str3;
    return result;
  }
  
void printLetterboven(char ch)
  {
    
    if (ch < 32 || ch > 126){
      ch = 32;
      }
    ch -= 32;
    for (int i=charWidth-1; i>-1; i--) {
      byte b = font[ch][i];
      for (int j=0; j<charHeight; j++) {
        digitalWrite(LEDpins[j], bitRead(b,j));
        }
      delay(1);
      }
    for (i = 0; i < rows; i++)
      digitalWrite(LEDpins[i] , LOW);
    delay(1);
  
  }  
  
  void printLetter(char ch)
  {
    if (ch < 32 || ch > 126){
      ch = 32;
      }
    ch -= 32;
    for (int i=0; i<charWidth; i++) {
      byte b = font[ch][i];
      for (int j=0; j<charHeight; j++) {
        digitalWrite(LEDpins[j], bitRead(b, 7-j));
        }
      delay(1);
      }
    for (i = 0; i < rows; i++)
      digitalWrite(LEDpins[i] , LOW);
    delay(1);
  
  }

After Programing, Connect Arduino Nano On PCB

Insert the PCB into the shaft of the Dc motor

Turn On POV Circuit Switch And Motor Switch

With this, your LED POV Display is ready. Have fun!