Published May 10, 2020 © LGPL

iBridges-Lite 3x3 key-pad shield

A short introduction in Itead Studios 3x3 key-pad shield for e.g. Arduino

BeginnerProtip30 minutes711

Things used in this project

Hardware components

Itead iBridges-Lite v1.1

IM120417023 - its a shield

Arduino UNO

Software apps and online services

Arduino IDE

Story

Today I briefly present a 3x3 key-pad shield for your Arduino from Itead Studio. The plug-in extensions that the arduino piggyback is put on are called "shields".

Additional PIN strips are usually routed along the shield to accommodate additional shields. This was clearly avoided in this product. Another shield would block the pressure area of the 9 keys.

It offers an extension, for example for a 5110 LCD, and an example sketch is available for this in the manufacturer's wiki. I have stripped it so far that the pressed key on the serial monitor outputs a log entry accordingly.

Output from Serial-Monitor

These are normal buttons without the option of switching an LED when printing.

The blue plastic cover wobbled too much for my taste: I had difficulty aligning it nicely in a row for a photo. The fit could be a little more precise.

The keypad matrix comes to mind as an alternative antive.

So if you want to provide up to 9 options for a user in a project, you have a simple option here to call up further actions within the loop.

God commanded and always pays attention to the tip of your soldering iron.

On our own behalf: There is this shield at ebay.de.

iBridges-Lite v1.1

int IBridge_Column_Pin0 = 7;
int IBridge_Column_Pin1 = 6;
int IBridge_Column_Pin2 = 5;

int IBridge_Row_Pin0 = 2;
int IBridge_Row_Pin1 = 3;
int IBridge_Row_Pin2 = 4;

void IBridge_GPIO_Config()
{ 
  pinMode(IBridge_Column_Pin0, OUTPUT);
  pinMode(IBridge_Column_Pin1, OUTPUT);
  pinMode(IBridge_Column_Pin2, OUTPUT);
  
  pinMode(IBridge_Row_Pin0, INPUT);
  pinMode(IBridge_Row_Pin1, INPUT);
  pinMode(IBridge_Row_Pin2, INPUT);
}

unsigned char IBridge_Read_Key()
{ 
  digitalWrite(IBridge_Column_Pin0, LOW);
  digitalWrite(IBridge_Column_Pin1, LOW);
  digitalWrite(IBridge_Column_Pin2, HIGH);

  if((digitalRead(IBridge_Row_Pin0)) &&  !(digitalRead(IBridge_Row_Pin1)) && !(digitalRead(IBridge_Row_Pin2)))
    return (1);
  if(!(digitalRead(IBridge_Row_Pin0)) && (digitalRead(IBridge_Row_Pin1)) &&  !(digitalRead(IBridge_Row_Pin2)))
    return (2);
  if(!(digitalRead(IBridge_Row_Pin0)) && !(digitalRead(IBridge_Row_Pin1)) &&   (digitalRead(IBridge_Row_Pin2)))
    return (3);
    
  digitalWrite(IBridge_Column_Pin0, LOW);
  digitalWrite(IBridge_Column_Pin1, HIGH);
  digitalWrite(IBridge_Column_Pin2, LOW);

  if((digitalRead(IBridge_Row_Pin0)) &&  !(digitalRead(IBridge_Row_Pin1)) && !(digitalRead(IBridge_Row_Pin2)))
    return (4);
  if(!(digitalRead(IBridge_Row_Pin0)) && (digitalRead(IBridge_Row_Pin1)) &&  !(digitalRead(IBridge_Row_Pin2)))
    return (5);
  if(!(digitalRead(IBridge_Row_Pin0)) && !(digitalRead(IBridge_Row_Pin1)) &&   (digitalRead(IBridge_Row_Pin2)))
    return (6);
    
  digitalWrite(IBridge_Column_Pin0, HIGH);
  digitalWrite(IBridge_Column_Pin1, LOW);
  digitalWrite(IBridge_Column_Pin2, LOW);

  if((digitalRead(IBridge_Row_Pin0)) &&  !(digitalRead(IBridge_Row_Pin1)) && !(digitalRead(IBridge_Row_Pin2)))
    return (7);
  if(!(digitalRead(IBridge_Row_Pin0)) && (digitalRead(IBridge_Row_Pin1)) &&  !(digitalRead(IBridge_Row_Pin2)))
    return (8);
  if(!(digitalRead(IBridge_Row_Pin0)) && !(digitalRead(IBridge_Row_Pin1)) &&   (digitalRead(IBridge_Row_Pin2)))
    return (9);  
    
  return(0);

}

void setup()
{
  IBridge_GPIO_Config();
  Serial.begin(9600);
}

void loop()
{
  unsigned char temp = 0;
  while(1)
  {
    temp = IBridge_Read_Key();
       
    switch (temp)
    {
      case 1:
        Serial.println("1");
        break;
      case 2:
        Serial.println("2");
        break;
      case 3:
        Serial.println("3");
        break;
      case 4:
        Serial.println("4");
        break;
      case 5:
        Serial.println("5");
        break;
      case 6:
        Serial.println("6");
        break;
      case 7:
        Serial.println("7");
        break;
      case 8:
        Serial.println("8");
        break;
      case 9:
        Serial.println("9");
        break;     

      default:
        break;
    }
      temp = 0;
      delay(200);
  }
}

Credits

Ingo Lohs

182 projects • 199 followers

I am well over 50 years and come from the middle of Germany.

iBridges-Lite 3x3 key-pad shield

Things used in this project

Hardware components

Software apps and online services

Story

Code

iBridges-Lite v1.1

Credits

Ingo Lohs

Comments

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iBridges-Lite 3x3 key-pad shield

iBridges-Lite 3x3 key-pad shield

Things used in this project

Hardware components

Software apps and online services

Story

Code

iBridges-Lite v1.1

Credits

Ingo Lohs

Comments

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