Last Updated or created 2023-01-17

As mentioned in post below

Update: https://www.henriaanstoot.nl/2023/01/17/arduino-concertina-poc-2/

Arduino Concertina

So i’ve bought some needed parts and made a proof of concept.

Arduino Code
Needs https://playground.arduino.cc/Code/Keypad/ keypad library
Not all buttons are configured with frequencies … yet

#include <Keypad.h>
int buzzer=9;
int lastsensorread;
int prevkey;
int push=400;
int pull=600;

const byte ROWS = 8; //four rows
const byte COLS = 3; //three columns
char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'#','0','*'},
  {'A','B','C'},
  {'D','E','F'},
  {'G','H','I'},
  {'J','K','L'}
};
byte rowPins[ROWS] = {5, 6, 7, 8, 10, 11, 12, 13}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {2, 3, 4 }; //connect to the column pinouts of the keypad

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup(){
  Serial.begin(9600);
  pinMode(buzzer,OUTPUT);

}
  
void loop(){
  char key = keypad.getKey();
//  if (key == NO_KEY){
 //   key = prevkey;
   //   }
      
  
 // if (key != NO_KEY){
    int freq = 0;
    int sensorValue = analogRead(A0);
    //sensorValue = ((sensorValue+4)/5)*5;



    
    if (sensorValue > push && sensorValue < pull   ) {
    // Serial.println("No pull or push");
    noTone(buzzer);
    }
    else 
    {
    if (key == '1' && sensorValue < push ) { tone(buzzer,415); }; // G push
    if (key == '1' && sensorValue > pull ) { tone(buzzer,466); }; // A pull
    if (key == '2' && sensorValue < push ) { tone(buzzer,392); }; // G push
    if (key == '2' && sensorValue > pull ) { tone(buzzer,440); }; // A pull
    if (key == '3' && sensorValue < push ) { tone(buzzer,587); }; // G push
    if (key == '3' && sensorValue > pull ) { tone(buzzer,659); }; // A pull
    
    if (key == '4' && sensorValue < push ) { tone(buzzer,440); };
    if (key == '4' && sensorValue > pull ) { tone(buzzer,392); };
    if (key == '5' && sensorValue < push ) { tone(buzzer,329); };
    if (key == '5' && sensorValue > pull ) { tone(buzzer,349); };
    if (key == '6' && sensorValue < push ) { tone(buzzer,493); };
    if (key == '6' && sensorValue > pull ) { tone(buzzer,523); };
      //8l f/e
    if (key == '8' && sensorValue < push ) { tone(buzzer,261); };
    if (key == '8' && sensorValue > pull ) { tone(buzzer,587); };

    if (key == 'A' && sensorValue < push ) { tone(buzzer,783); };
    if (key == 'A' && sensorValue > pull ) { tone(buzzer,739); };
    if (key == 'B' && sensorValue < push ) { tone(buzzer,523); };
    if (key == 'B' && sensorValue > pull ) { tone(buzzer,493); };

    if (key == 'D' && sensorValue < push ) { tone(buzzer,987); };
    if (key == 'D' && sensorValue > pull ) { tone(buzzer,880); };
    if (key == 'E' && sensorValue < push ) { tone(buzzer,659); };
    if (key == 'E' && sensorValue > pull ) { tone(buzzer,587); };
    
    //tone(buzzer,freq);
    }
    Serial.println(sensorValue);
    Serial.println(key);
    Serial.println(freq);
 //   lastsensorread = sensorValue;
    prevkey = key;
      
 // }
}

Lets make a test holder from pieces of wood, when i’ve got the sizes correct, i’ll 3D print something