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Picture of Simple Arduino 5x2 LED Matrix
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This is my First Arduino project so bear with me. 
This a simple LED Matrix that is run by an Arduino Uno 3.
You will need these parts:

-10 LEDs
-Arduino Board
-Breadbord
-Jumper Wires
-And some solid core wire


Step 1: LED placement

Picture of LED placement
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Place the LEDs across the middle of the breadboard one LED row on one side and one LED row on the other.
Place the LEDs so that each pin is in a different row on the breadboard. 
 
mangopeach2 years ago
Thanks man. Was a good tutorial. Had a good time doing it.
quatch2 years ago
You should use some current limiting resistors there. You're lucky in that white LEDs have a high Vf (forward voltage drop) and thus don't need a large resistor to keep the current low.

http://en.wikipedia.org/wiki/LED_circuit

http://led.linear1.org/led.wiz

jackjackboom (author)  quatch2 years ago
dont know why they are showing up blue... Odd. I was using my old iphone 3g for pictures so that explains the low quality.
jackjackboom (author)  quatch2 years ago
I am actually using green ones and I have done some simple led things before without burning out any leds before. Although you are quite right. Just didn't have any layin around..