Using ISD1700 library and LiquidCrystal together

Hi all,

Im new here, and this is also my first Arduino project.

This is my setup:

  • Arduino UNO
  • Velleman Audio Shield
  • LCD display 16x2

I want to use the ISD1700 library and LiquidCrystal library together. If i use only the ISD1700 library it works fine. If i use the LiquidCrystal library it also works fine. But if i want to use it together it doesn't work. I don't get an error in the Arduino program. This is my code:

#include <LiquidCrystal.h>
#include <ISD1700.h>

ISD1700 chip(10);
int vol=0; //volume 0=MAX, 7=min

int interval = 5000;
long tijd = 0;
boolean timerGestart = false;

// LCD
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
   // set up the LCD's number of columns and rows: 
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print("Print message");
   Serial.println("Sketch is starting up");

void loop() {
  // put your main code here, to run repeatedly:
  int value = analogRead(A0);
  //value = map(value, 600, 950, 0, 255);
  // Turn off the display:
  // Turn on the display:
  if (value < 5 ) {
    if (!timerGestart){
      tijd = millis();
      timerGestart = true;
    if ((millis() - tijd) > interval) { 
      timerGestart = false;
  } else if (value > 5) {
    timerGestart = false;

I think the problem is something with ISD1700 chip (10); I think the libraries uses the same digital ports or something like that? I try to change the ports but then the code doen't work. Can somebody tell me how I can set this up so it can work together?

If my post is incomplete please let me know. This is my first project and i have no idea what information is needed to debug the problem.

Thanks a lot.

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

These are the pins used by the LCD library. Check which of them are already in use by the other shield, and replace them by other pins.

The Audio Shield uses the ICSP pins, i.e. 4, 5 and 6.

Thanks a lot! Its now working :slight_smile:

I am looking for a libarary for ISD1760 - you said in your post you got it to work - can you share the link to the library?



its still needs some work, am right now trying to modify it to work on a Due

Hope it helps