Picture of Find home detector

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.
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Step 1: Parts Needed

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

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

Soldering iron

Step 2: Software needed

Arduino IDE

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


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

Picture of Batery holder
Photo 2011-06-09 06 41 13.jpeg
Attach the Magnetic Snap to the bottom of the battery holder and to the fabric.

Step 7: Uploade the software

Picture of Uploade the software
Download the sketch from or use the attached pde file.
Update destinationLat and destinationLon to the location you want to find and upload it to your Lilypad.

Step 8: Find your way home

Picture of Find your way home