Instructables

Simple Arduino 5x2 LED Matrix

Picture of Simple Arduino 5x2 LED Matrix
IMG_0082.JPG
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


 
Remove these adsRemove these ads by Signing Up

Step 1: LED placement

Picture of LED placement
IMG_0075.jpg
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. 

Step 2: Grounding the LEDs

Picture of Grounding the LEDs
Then take small bits of the solid core wire and pin them down one the row in which each cathode is in. Take the other end and put it in one of the power slots. When you are done connecting all of the LEDs cathodes to the power slot connect the the two power slots with one long peice of wire.let yet another piece of wire connect to your Arduino.

Step 3: The positive leads.

Picture of The positive leads.
IMG_0080.jpg
Instead of just putting a jumper cable into the same row as the LED's anodes, I lead some wire out away from the LEDs on the breadboard so that I could attach the jumper wires to them. Away from the LEDs so that it would look better. This improved my project a lot I think.
mangopeach11 months ago
Thanks man. Was a good tutorial. Had a good time doing it.
quatch1 year 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)  quatch1 year 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)  quatch1 year 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..
Pro

Get More Out of Instructables

Already have an Account?

close

PDF Downloads
As a Pro member, you will gain access to download any Instructable in the PDF format. You also have the ability to customize your PDF download.

Upgrade to Pro today!