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Author Topic: Power Supply  (Read 1292 times)
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My nickname on the forum used to be Soapy29.
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Three batteries is only 4.5 volts, if each battery is 1.5 volts, which most are.
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What about one of these: http://www.sparkfun.com/products/341
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would I need two?
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I am using the uno smd. I found a old broken ac adapter with a right sized barrel plug for arduino. If i cut the cable and striped the two wire could i connect a power source that way? if so what would the required voltage be.
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oops. I should of looked there first! would there a way to find out which wire is + and which is - for the barrel plug?
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but how can i know what wire is connected to the inside pin?
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