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Nick Gammon
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Best answer is Arduino UNOUno because it is enough for your application. 

But all Arduino are works on 5 volt or 3.3 volt for.

For operating 12 volt devicedevices use transistor and MOSFETtransistors or MOSFETs.

Best answer is Arduino UNO because it is enough for your application. But all Arduino are works on 5 volt or 3.3 volt for operating 12 volt device use transistor and MOSFET

Best answer is Arduino Uno because it is enough for your application. 

But all Arduino are works on 5 volt or 3.3 volt.

For operating 12 volt devices use transistors or MOSFETs.

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Best answer is Arduino UNO because it is enough for your application. But all Arduino are works on 5 volt or 3.3 volt for operating 12 volt device use transistor and MOSFET