Analog expance

Forum 2005-2010 (read only) Hardware Interfacing
1

Hi, i'm working on arduino since no long time, and i need to use a lot of led with analog output; can you tell how to expance the analog outs

2

I assume you mean expand the analogue output. The arduino has no true analogue output, but it does have a PWM output on some of it's pins. You can use PWM like an analogue output:-
http://www.thebox.myzen.co.uk/Tutorial/PWM.html
There are many ways to expand this and a lot depends on what you want to drive. For LEDs the TLC5490 is a popular chip and there is a library to drive it. You can also multiplex it like on this project:-
http://www.thebox.myzen.co.uk/Hardware/Mini_Monome.html

3

I'll try... thank you very much!