What should be in your kit:
1 – PCB
27 – LED’s
2 – 6 Pins for Arduino
2 – 8 Pins for Arduino
3 – Resistors
1 – Foam Guide
1 – Small Wire
1 – Medium Wire
1 – Large Wire
You will need: Solder Iron, Solder, Wire Cutters, Wire Strippers, Safety Googles, Helping hands are always good (but not manditory) and a really GREAT ATTITUDE!!!
to by a kit go to http://lwjmstore.blogspot.com/
In the below pictures I will be switching between RED LED’s and GREEN LED’s. My mom made a GREEN one…some parts didn’t turn out so good. She did try – and she is a VERY beginner! Good Job Mom!
Have FUN!
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Signing UpStep 1: Information
LED’s: All LED’s have a Positive (+) and a Negative (-) As you can see on the picture below. The Positive (+) is longer than the Negative (-) You will always be bending the Negative (-). The official term for the Negative is “Cathode” and for the Positive is “Anode” For these directions we will use short and long.
Testing your LED’s: I’ve tested every single LED. However if you’d like to test to make sure…here’s how to do it. Take a Lithium battery, stick the LED with the long led on the side of the battery marked with a "+". Press the Leds against the battery. The light should turn on. If not…you’ve got yourself a bad LED.
Guide Sheet: I used this as my template. If you ever get confused (easy to do) refer back to the guide sheet. This will tell you how to bend and placement of the LED’s.
Each circle has 2 dots. The one with the arrow is the Negative (-) and the one standing alone is the Positive (+). This shows you which way to bend your Negative (-) led












































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Evan
This is mars - you autographed one of your first boards for my daughter!
Anyhow - we've built your project a couple of times - and my little girl now loves what she calls "LED Sculptures"!
Thanks a bunch and keep up the great work!
Cheers!
like this
http://www.sparkfun.com/tutorials/181
power supply 3V
forward voltage 3.2-3.4
20mA
How many leds can i light up with 3V? Do i need a resistor for that, a