Driving a speaker (or headphones) with ARM (LPC2138)

juvan said:

Hello

I am freshly new here, so I hope this is the correct place to post this question. If not, I apologize.

I would like to connect a sound playing device (speaker, headphones), which ever is easier, to my ARM's ( LPC2138 ) DAC converter. My question is, what should the circuitry - that is connected to the ARM's DAC pin - for the speaker be. I am not interested in the quality of the sound, all I need is a rough sound, to see that it works.

I found this circuitry but I don't know if it is at all correct or, what the modifications should be, or if there is perhaps an easier way, since I don't have that specific amp.
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The speaker that I have is 5W, 4ohm. The headphones are just your standard MP3 little ones. I would prefer to connect it to the speaker though.

Thanks for your time and any help.

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