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Im a student who new to arduino. I learning about arduino actually and im interested in it. I wanted to know whether arduino duemilanove can be used for 5V adc? What is the difference of arduino uno and arduino duemilanove. Ur help is really appreciated, thanks..
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It's adc is 5volt  and the only difference is how they connect to the pc the uno  uses a atmega16u2 for USB to serial and duemilanove uses a FT232RL and only has 5 volt power uno has 3.3 at 50ma and 5 volt
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It's adc is 5volt  and the only difference is how they connect to the pc the uno  uses a atmega16u2 for USB to serial and duemilanove uses a FT232RL and only has 5 volt power uno has 3.3 at 50ma and 5 volt

duemilanove also provides 3.3vdc at 50ma to the shield power connector, it comes from the FTDI chip.

From a writing sketches and wiring up to external components the duemilanove and Uno are 99.999% identical. Only difference is UNO has a slightly smaller bootloader so duemilanove has slightly smaller flash size and uploading sketches is twice as fast on the UNO. Eith board is a great way to get started learning about arduino programming.
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"Only difference is UNO has a slightly smaller bootloader"
and duemilanove can be reprogrammed with that same bootloader once you learn some more - but in your initial programming it will not be a factor.
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