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Well how much does the digital ports output in volts? I don't want to fry my leds I can regulate it with resistors.
The standard Uno board output pins have a nominal +5vdc output when set high. Output pin current should be limited to 30ma or less as the 40ma absolute maximum rating is a value you should never be using continuously. If your LEDs require more then 30ma for full brightness then you should use extra external components (transistors, IC drivers, etc) to drive the leds.
Lefty