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1  Using Arduino / Project Guidance / Re: Temperature display on: November 21, 2012, 01:17:11 pm
Yes of course sorry.

the 2 matrix part numbers are the TC20-11EWA

im using the arduino uno

2  Using Arduino / Project Guidance / Temperature display on: November 21, 2012, 12:32:47 pm
Hello

I am wanting to build a temperature display using 2 - 5x7 led matrixes that i have.

Could someone assist me in telling me what parts i would need and more importantly the processing of hooking all the components up

Thankss
3  Using Arduino / LEDs and Multiplexing / Re: 5x7 LED Matrix Issue on: October 26, 2012, 01:29:02 am
I wired it up as you said with all the corrEct pinouts. 
4  Using Arduino / LEDs and Multiplexing / Re: 5x7 LED Matrix Issue on: October 25, 2012, 11:20:10 pm
Sorry, that picture is from when i changed the code for all pins to be HIGH, it is the only thing that makes a difference to the matrix
5  Using Arduino / LEDs and Multiplexing / Re: 5x7 LED Matrix Issue on: October 25, 2012, 01:39:45 pm
when i execute that code, this is the result:
6  Using Arduino / LEDs and Multiplexing / Re: 5x7 LED Matrix Issue on: October 25, 2012, 12:39:45 pm
Just really want to get it working first ;P
7  Using Arduino / LEDs and Multiplexing / Re: 5x7 LED Matrix Issue on: October 25, 2012, 12:35:33 pm
Code:
const int rows[] = { 9, 14, 12, 8, 1, 7, 2 };
const int cols[] = { 13, 3, 4 , 10, 6};

void setup()
{
  for (int c = 0; c < 7; c++)
  {
    pinMode(cols[c], OUTPUT);
    digitalWrite(cols[c], LOW);
  }

  for (int r = 0; r < 5; r++)
  {
    pinMode(rows[r], OUTPUT);
    digitalWrite(rows[r], LOW);
  }
void loop(){
}

8  Using Arduino / LEDs and Multiplexing / Re: 5x7 LED Matrix Issue on: October 25, 2012, 12:09:34 pm
I have built the circuit but the matrix is not working correctly

could you take a look and see if i have made a mistake.

(the resistors are not connected on purpose, was checking if they were limiting matrix too much. BUT are connected during tests)

The results are slightly dim LEDs slightly brighter LEDs, some off.
9  Using Arduino / LEDs and Multiplexing / Re: 5x7 LED Matrix Issue on: October 23, 2012, 02:46:11 pm
there are 7 pins on each side of the LED matrix..
10  Using Arduino / LEDs and Multiplexing / Re: 5x7 LED Matrix Issue on: October 23, 2012, 11:19:52 am
Ahh i think i finally understand it all!

Thank you!

Just one last question, what is the advantage/or disadvantage of using a matrix with transistors instead of the IC?

It is so great to have such a helpful community!!
smiley
thanks
11  Using Arduino / LEDs and Multiplexing / Re: 5x7 LED Matrix Issue on: October 23, 2012, 10:54:05 am
like this?
12  Using Arduino / LEDs and Multiplexing / Re: 5x7 LED Matrix Issue on: October 23, 2012, 10:47:22 am
could you explain why the matrix is wired incorrectly? which way should it be?
13  Using Arduino / LEDs and Multiplexing / Re: 5x7 LED Matrix Issue on: October 23, 2012, 10:32:08 am
is this correct?
14  Using Arduino / LEDs and Multiplexing / Re: 5x7 LED Matrix Issue on: October 22, 2012, 02:02:26 pm
Really cool! thanks

could you just explain how i would wire up my matrix board to my arduino?
15  Using Arduino / LEDs and Multiplexing / Re: 5x7 LED Matrix Issue on: October 22, 2012, 01:35:25 pm
It is this one ---> (http://www.kingbrightusa.com/images/catalog/SPEC/tc20-11ewa.pdf)

I am trying to drive each LED independently so I would be able to make a letter or number.

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