led matirx

i am confused i am trying to make an led matrix but in some websites they are asking to make it with transistors and in some without.
what should i do ??


Many circuits shown on the web are a bad design and could damage your arduino or your matrix.

If you post a link here to one that you have found, we can tell you if its a good design.


Hi, what size LED matrix?

Tom..... :slight_smile: