knut_ny:
Impossible to read your code. We see no connections. They?? no. You!
// Demo the quad alphanumeric display LED backpack kit
// scrolls through every character, then scrolls Serial
// input onto the display
#include <Wire.h>
#include "Adafruit_LEDBackpack.h"
#include "Adafruit_GFX.h"
Adafruit_AlphaNum4 alpha4 = Adafruit_AlphaNum4();
void setup()
{
Serial.begin(9600);
alpha4.begin(0x70); // pass in the address
}
void loop()
{
alpha4.writeDigitRaw(0, 0xFFFF);
alpha4.writeDigitRaw(1, 0xFFFF);
alpha4.writeDigitRaw(2, 0xFFFF);
alpha4.writeDigitRaw(3, 0xFFFF);
alpha4.writeDisplay();
delay(500);
alpha4.clear();
alpha4.writeDisplay();
delay(500);
}
that is the code, which provided to test the display. Thanks for Replying.
patadr