The Find home detector is a device to show me the way home by indicating the direction with a light. It uses a LilyPad, GPS, compass and some LEDs. Using the GPS to get a position and then calculate the direction to the location of my home. The compass is then used to get my heading so it is possible to indicate the direction I should travel.

Step 1: Parts Needed

Hardware:
LilyPad Arduino
GPS Micro-Mini
Compass Module with Tilt Compensation
7 x LEDs to indicate direction
Conductive thread
Fabric
Battery holder (4 x AAA)
Battery

Optional Hardware
2 x Magnetic Snap or similar to attach the battery holder for easy removable
4 x Magnetic Snap or buttons

Tools:
Needle
Soldering iron

Step 2: Software Needed

Software
Arduino IDE

Software librarys:
TinyGPS by Mikal Hart
NewSoftSerial by Mikal Hart
Wire for I2C communication with the compass

Sketch
http://github.com/evilmachina/Find-home-detector

FindeHomeDetector.pde
Download

Step 3: Layout

Step 4: Sewing the Circuit

Start with the Lilipad and then the component closest GPS, compas and last the leds

TIP: Use glue to insulate and protect conductive thread knots.

Step 5: Batery Holder

Attach the Magnetic Snap to the bottom of the battery holder and to the fabric.

Step 6: Make It Wearable

Attach the Magnetic Snap or buttons alongside the side of the cloth.

Step 7: Uploade the Software

Download the sketch from http://github.com/evilmachina/Find-home-detector or use the attached pde file.
Update destinationLat and destinationLon to the location you want to find and upload it to your Lilypad.