With this you just type the text you want on your computer and your 5x5 dot matrix shows the message.

~25 leds
~Arduino uno
~5x 100ohm resistor
~and a bit of skripting

It took me a while to figure this all out but in the end it was quite rewarding. not really practical though. :)

Plz comment and let me know what you think.

Step 1: You Wil Need..

25 leds
Arduino-  have the uno-
Sharp nose [liers for hard to reach places (optional)
5x100 ohm resistors (brown black brown)

Step 2: Diagram

I know it looks sideways but this is how i connect it to my Arduino

Step 3: Starting With Connections

Here is how i coneckted the leds. it gets a bit conplecated but works. feel fre 2 try own metheds

I made it that all the anodes are connected down, like in the pic. the cathodes are so that only 2 are connected. The one on the left shears a line with the one on his right.

Step 4:

The catrodes are then connected to allow a horizontal connection as n the photo.

I just wired them all to a neutral location so that can connect them to my arduino easier

Step 5: To Arduino

now just connect according to the diagram with the resistors on the cathrodes. 

Step 6: Now Connect to Pc

Connect your arduino to pc upload the script, go to serial monitor, type your message and see your 5x5 dot matrix give you your message

<p>If we want to replicate this with an arduino, where do we put the resistors? If anyone knows can you help?</p>
<p>The connections are mirrored on each side right?</p>
<p>Can you please show more pictures of the other side connections. You only showed one side and it is a little hard to follow. </p>
<p>Please can you give the the circuit drawing. I cant understand your circuit . email- soumojitash@gmail.com</p>
<p>thanks, my own code used more code to initialize the matrix. now it's a lot easier and flexible</p>
<p>Sorry i can&acute;t find the script, where is it?</p>
Nice job! I tried to make one myself but i made it 5x14 leds. Problem is i dont know how to fix the code, the columnpins are pins 0-13 and the rowpins are pins A0-A4. Any ideas on what to do? Id really appreciate your help.
<p>Thanks. Excellent project. But I am struggling with which leads are connected to which. Do you have a complete schematic with names that relate to the code? Or can you name each pin on the breadboard and what's connected to it?</p>
would the Arduino Uno REV 3 do good and where did you get your 100ohm resitors
the Arduino Uno REV 3 should work and I got the resistors from my local electronic hobby shop.
Very nice project ! It was very helpfull for me :) <br> <br>I was looking for some code to drive my dot matrix and this does the job very well. Also the code is easy to understand unlike other guides on the web! <br> <br>For now the code is used to drive the 5x5 part of my 5x7 matrix and with a little redesign it should run whole matrix with ease. <br> <br>Ive added a image of it running. <br>Note i used 180Ohm resistors hidden under the matrix to limit the current.. <br> <br>
Thanx I feel I could have done better but I'm glad it helped someone :)

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