Hello everyone!
I am having a little Problem with a 8x8 Dot Matrix.
The Datasheet can be found here: http://www.adafruit.com/datasheets/454datasheet.pdf
It's the KWM-20882CVB type.
I want to run a simple test where I connect GND to a column and set one row after another to HIGH, turning the previous one to LOW again.
This works somewhat...for some reason two coloumns light up.
This how how I wired up the matrix:
Arduino Matrix
GND Pin 3
D3 Pin 5
D4 Pin 6
D5 Pin 7
D6 Pin 8
D7 Pin 16
D8 Pin 15
D9 Pin 14
D10 Pin 13
Here is the sketch I used for this matrix:
void setup() {
for (int iii = 0; iii < 8; iii++) {
pinMode(iii + 3, OUTPUT);
}
}
void loop() {
for (int jjj = 0; jjj < 8; jjj++) {
digitalWrite(jjj + 3, HIGH);
delay(500);
digitalWrite(jjj + 3, LOW);
}
}
Here is a small video of the problem:
As you can see, two coloumns are lid up where only the third from the top should light up.
Note: When I disconnect D10 the second column doesn't light up anymore but the last row will be missing.