More output pins needed (combining shields)

Forum 2005-2010 (read only) Software Syntax & Programs
1

Don't really know if this is the best location to pose this question, so move if needed.

I am currently working on a project with a Duemillanova. To this I need to attach an Ethernet shield (using pins 10-13) and an LCD shield (using pins 4-9). This leaves me with pin 0-3. Exactly enough for my purposes, if not that 0 and 1 are hardwired to TX/RX which interferes.

Am I stuck here or are there solutions to this problem? This scheme shows the apparent use of analog pins as output, but I do not see this being supported in the Reference.

BTW: for the testing phase I'll drive LEDs with the pins, later on these will be (probably transistor driven) solid state releais.

Any help is hugely appreciated.

2

The analog pins can be used as digital pins. As analog pins, there are referred to as pins 14 to 19 (Analog pin 0 = Digital pin 14).

3

Ah, ok... did I do a lousy search, or can we put this information somewhere?

4

It's all there,

you just have to read the whole page. :wink:

Eberhard

5

:o