The skirt blinks randomly when it gets dark.
To see the skirt in action visit: http://collarandlapel.com/category/rock/lilypad-arduino-led-rock-lilypad-arduino-led-skirt/

Material lists:

Tulle
Lining (I have used medium-weight cotton.)
Elastic tape
Scissors
Sewing Yarn
Sewing machine
Bias Tape

LilyPad Arduino
Several LilyPadLEDs (you can also use normal LEDs, but please consider that you will also need resistors)
Conductive Thread
Sewing needles
LilyPad Light sensor
Battery holder
Battery

Step 1: Tulle Skirt Pattern

Make the skirt pattern as specified above. If you want the skirt more fluffy, just add some more layers of tulle.

Step 2: Sewing the Tulle Skirt

1. Sew sides of lining together and serge the edges.
2. Sew sides of tulle together.
3. Lay the different layers on top of another and sew the layers together at top end.
4. Take an elastic band and sew the ends together. (The width should be comfortable for you.)
5. Pin the elastic tape with some pins to the skirt.
6. Use the zig-zag stitch of your sewing machine to add the elastic tape to your skirt.
7. Add bias tape to serge the hem of lining.

Afterwards you can make your skirt blink with the help of LilyPad Arduino.

Step 3: Arduino Sketch

//array of LEDs
int leds[] = {2, 5, 6, 9, 10, 11, 12, 13};

int randNumber;

//light up LED
void blinken(char a)
{
digitalWrite(a, HIGH);
delay(10);
digitalWrite(a, LOW);
delay(10);
}

void setup()
{
//set pinmode for all 8 pins see leds [] array
for (int index = 0; index < 9; index++)
{
   pinMode(leds[index], OUTPUT);
}

//pins used for light sensor
pinMode(A3, OUTPUT);
digitalWrite(A3, HIGH);
pinMode(A4, OUTPUT);
digitalWrite(A4, LOW);

//set pin to GND
pinMode(3, OUTPUT);
digitalWrite(3, LOW);
}

void loop()
{

//get value of light sensor
int wert = analogRead(A5);

if(wert<125)
{
//catch random value betweeen 0...8
    randNumber = random(0,9-1);

//light up sensor of 3 pin rows each connected to 1 arduino pin
    blinken(char(leds[randNumber]));
    blinken(char(leds[abs((randNumber+2)/2)]));
    blinken(char(leds[abs((randNumber+4)/2)]));
   }
}

Step 4: The Finished Skirt

...some more impressions of the working process..

Hope you like it. If you have any questions, I would like to hearing from you.:)

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8 Comments

Digi Majou

Question 3 years ago on Step 4

Great Project! I was wondering how the Lilypad battery (AAA, 100mA) was able to power 24 LEDs, assuming the LEDS draw 20 mA)?
I'm working on a project with a similar number of LEDs in parallel circuit (6 groups of 4 LEDs), and the Lilypad simplesnap lipo battery that's wired in isn't enough (i need 480 mA for an hour). What do you think would happen if i connected a 1000 mA Lipo to the boards + and - ports? Would this be a good or bad idea? Thanks for any help you can give!!