Dot Matrix LED

prayami · Joined: 22 Dec 2004 Posts: 78

Hi...

I am using Dot Matrix LED with 18F4525. Everything is working fine. But
one little odd thing I can see is: One dot on the right hand bottom corner
is brighter than all other dots.

(1)
It would be better, if we can brighter all the dots like that or
(2)
Just adjust that dot as the same brightness as of the others.

I tried a lot but could not find out the reason.

I have not used any register with Dot Matrix LEDs.
And have delay of 50us after turning each dot on.

Can anybody have suggestion to solve this? Or know the reason?

Mark · Joined: 07 Sep 2003 Posts: 2838 Location: Atlanta, GA

If you are multiplexing the LEDs then it is your code. Try posting a small example that demonstrates the problem.