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LED CODE Please help

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If you want to send data serially, you'll need a serial converter.  This will take 1-2 pins from the arduino and translate that to x pins, depending on the converter.  (2 pins for a lock.)   (Plenty of information on how to do this across the web.)

This guy:
does a decent job of walking you through turning on an LED, making it blink, playing games with it, etc. in a step by step process.

thanks guys but when I turn all the leds the last one stays off. I created an 2x4 but when I turn only that one it turns one.

If you're using pins on the Arduino, make sure you're not using the TX/RX pins.  (They're for the serial connection and if you have it connected to the computer to power it, they'll always be on.


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