Picture of Arduino 1-12 blinking led array
In this tutorial I will show you how to blink 1-12 leds. I have designed the code so that you can insert 1-12 leds but you can edit it so that you can insert 13 or more.
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Step 1: Materials

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For this project you will need:
Arduino board
1-12 leds (im using 10)
usb adapter
solderless breadboard

Step 2: Inserting leds

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Take your leds and put them in a row on the breadboard. Make sure you know which side of the led is positive and which side is negative. I like to point the positive side of the led towards the right. Also, keep a one hole spacing in between each led

Step 3:

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Now, plug in a medium sized wire into the first hole on the negative row on the top of the breadboard.

Step 4:

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Now insert wires in front of every positive side of each led.

Step 5:

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Now insert wires in the negative row that you put the medium wire in. now plug those wires into the negative sides of the leds.

Step 6:

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Now we have to plug the wires in. Position the arduino board so that you can plug the wires in from arduino pin 1 to arduino pin 12 but it doesnt matter what pin you go up to.

Step 7:

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Now plug the negative wire into GND.
kjsrocks made it!1 month ago

I uploaded your code to my HSS (Halloween Scaring System)

Here are the results

Capture_20150503.mp4(516x290) 13 KB
therabbii1 made it!1 year ago

thanks, it worked great

IMG_1309.MOV(516x290) 20 KB
pfred22 years ago
When I was a kid and made blinking LED projects I used SSI TTL ICs, usually there was a 555 timer involved too. How times have changed ...
pato5 (author)  pfred22 years ago
yeah, everythings alot more simple but the things you can do are amazing