Metec FlatPCB Brailleline

Community Products and Services
1

Here is an example how to connect the FlatPCB cells.
Press the keys to turn on the pins. They are multi use.

1652×929 428 KB 

#define CLK_H       PORTD |=  4     // D2   PD2  --> Clock             OUTPUT  (yellow)
#define CLK_L       PORTD &= ~4

#define STR_H       PORTD |=  8     // D3   PD3  --> Strobe            OUTPUT  (green)
#define STR_L       PORTD &= ~8

#define DOUT_H      PORTD |=  16    // D4   PD4  --> DataOut (Pins)    OUTPUT  (blue)
#define DOUT_L      PORTD &= ~16

#define DIN         PIND & 32       // D5   PD5  <-- DataIn (Keys)     INPUT   (purple)



const int cellCount = 8;
byte cells [cellCount];
byte keys  [cellCount];  // 1 = pressed, 0 = not pressed

void setup() 
{
  DDRD |= (4 | 8 | 16);   // Set as OUTPUT (1=RX, 2=TX,  4=D2, 8=D3, 16=D4,   32=D5, 64=D6, 128=D7)

  // DoTests();
}


void loop()
{
  RWFlatPCB();
}





void RWFlatPCB()
{
  CLK_L;
  STR_H;  // Strobe on
  
  int index;

  for(int i = 0; i < cellCount; i++)
  {
    if (i & 1) index = i-1; else index = i+1;   // change the cells

    for(int b = 7; b >= 0; b--)
    {
      CLK_L;   if ( cells[index] & (1<<b) )   {DOUT_H;} else {DOUT_L;}     CLK_H;
    }
  }



  // Read the Keys
  CLK_L;
  STR_L;  // Strobe off
  
  for (int i = cellCount-1; i > 0; i--) 
  {
    if ( (DIN) == 0 )  keys[i] = 1;  else keys[i] = 0;
    
    CLK_H;  CLK_L;

    if ( keys[i] == 1 ) cells[i] = 255; else cells[i] = 0;    // Turn on the cell
  }

  STR_H;  // Strobe on
}




void DoTests()
{
  // Lines down
  for(int j = 0; j < 10; j++)
  {  
    for(int i = 0; i < cellCount; i++) { cells[i] = 1 +8;   }  RWFlatPCB(); delay(100);
    for(int i = 0; i < cellCount; i++) { cells[i] = 2 +16;  }  RWFlatPCB(); delay(50);
    for(int i = 0; i < cellCount; i++) { cells[i] = 4 +32;  }  RWFlatPCB(); delay(20);
    for(int i = 0; i < cellCount; i++) { cells[i] = 64+128; }  RWFlatPCB(); delay(10);  
  }

  for(int i = 0; i < cellCount; i++) { cells[i] = 0;      }  RWFlatPCB(); delay(200);  

  // X-Test
  for(int j = 0; j < 10; j++)
  {
    for(int i = 0; i < cellCount; i++) { cells[i] = 1+16+4+128; }  RWFlatPCB(); delay(100);  
    for(int i = 0; i < cellCount; i++) { cells[i] = 8+2+32+64;  }  RWFlatPCB(); delay(100);    
  }
  for(int i = 0; i < cellCount; i++) { cells[i] = 0;      }  RWFlatPCB(); delay(200);  

  // On-Off
  for(int i = 0; i < cellCount; i++) { cells[i] = 255;    }  RWFlatPCB(); delay(500);  
  for(int i = 0; i < cellCount; i++) { cells[i] = 0;      }  RWFlatPCB(); delay(200);       

  // Every pin
  for(int j = 0; j < 10; j++)
  {
    for(int b = 0; b < 8; b++)
    {
      for(int i = 0; i < cellCount; i++) { cells[i] = (1<<b); }  RWFlatPCB();
    }
  }

  // All off
  for(int i = 0; i < cellCount; i++) { cells[i] = 0;      }  RWFlatPCB();
}

FlatPCB.jpg
FlatPCB.jpg1652×929 456 KB

FlatPCB.ino (2.68 KB)

2

When you advertise your product, maybe you should mention somewhere that it is a braille line?

3

Yes it is a brailleline. :slight_smile: They are available with 6 and 8 cells. You can combine them to a larger one too.
There are more information:

4

What's the price tag?

5

You can get an offer about the parts you will need. It depends of the amount and where we should deliver.
Please write an email to contact@metec-ag.de

1 Like