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I've been thinking on using a photo resistor, a photodiode or a phototransistor, but i don't know which will provide a better result, this is, the better response.

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The photo element is just a small component of your system. You'll need to do a lot more work before you need to specify that. What do you mean by "better response" and "better result"? – Kevin Vermeer Apr 13 '12 at 16:18
1d barcodes only? fixed orientation, .... – kenny Apr 13 '12 at 16:39
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Do you actually want to build your own from scratch (as a learning project or something). Or would you be happy if you could just buy a bar code reader module? – Rocketmagnet Apr 13 '12 at 20:59
I'm actually building it for a project. – David Chaparro Apr 16 '12 at 20:09

closed as not a real question by Kevin Vermeer Apr 17 '12 at 9:24

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, see the FAQ.

1 Answer

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a $15 BC scanner on Ebay would work better.

Photo Diode with transimpedance amplifier has highest gain, bandwidth Photo transistors are for slow apps. YOu might want a PD with Daylight blocking filter too to reduce interference. (cheap from Sharp or others) Very repeatable devices.

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