Test 8*8 LED Matrix with Arduino Uno R3

Just purchased a Arduino Start Kit with Arduino Uno R3, and some components. It's the first test for the 8*8 LED Matrix.


Basically it follow the tutorial of Row-columm Scanning to control an 8x8 LED Matrix, can be open in in Arduino IDE (1.5.7 in my case), File -> Examples -> 07.Display -> RowColumnScanning.

The connection follow the diagram:

To make it simple, I remove the two potentiometers, and ignore readSensors() in the code.

8 pcs of 220 ohm resistors are added  to limit the current, to protect my board.

The 8*8 LED Matrix marked 1588BS, it should be the part number or model number. Actually I cannot find any marking to recognize the pin 1. I place it by chance.

To turn on any spot, set it low in the code:

  pixels[x][y] = LOW;

Next:
- Implement walking bit to test all bit ON/OFF.

Arduino IDE on Raspberry Pi

To install Arduino IDE on Raspberry Pi, enter the command:

$ sudo apt-get install arduino

After installed, run it with command:

$ arduino

This video show how to, and also show how Raspberry Pi connected Arduino Uno run.



Cross post with Hello Raspberry Pi.

Arduino IDE error - avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied

If you run Arduino IDE on Ubuntu (Arduino 1.5.7 and Ubuntu 14.04 in my case), most possibly you cannot upload to Arduino board, caused by the error of:

avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied
ioctl("TIOCMGET"): Inappropriate ioctl for device

To fix it, enter the command:
$ sudo usermod -a -G dialout <username>
$ sudo chmod a+rw /dev/ttyACM0

Where <username> is your user name in Ubuntu, /dev/ttyACM0 is the detected device of your Arduino board.

Check the video: