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.
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
Compass Module with Tilt Compensation
7 x LEDs to indicate direction
Battery holder (4 x AAA)
2 x Magnetic Snap or similar to attach the battery holder for easy removable
4 x Magnetic Snap or buttons