Weight is evenly distributed, however, the turning circle is just about nil.

The concept 3D drawing has been completed!

I have a friend who has a copy of AC3D, a easy to use CAD package. With in an hour or so he had taken my hand drawn chicken scratching and drawn the concept model of what I was after.

White is 110mm and 50mm PVC tubing .  Yellow is the electronics enclosure.  Black is the two Battery's.  Blue is the Motor and shaft.  Purple is the propeller.  The white oval at the top, is the GPS unit.

Note: parts are not to scale.

This shows the blue motor, blue shaft and purple propeller inside the white PVC casing

A previous entry, discussed building the intial Digital Compass test circuit on a breadboard. Now it was time to design a PCB layout and etch it out. It's only taken 3 weeks to do. A lot of family time over xmas, but I still managed to fit in some time here and there. I had previously came acress a web site talking about using a laser printed image and an hot cloths iron to transfer the PCB layout onto the copper.

Some lines look crooked, but come out ok, when printed out on the laser printer!  Created using ExpressPCB.  I couldn't get it to print out a clear image, so I took a screen shot, and printed it via GIMP.

This is the schematic diagram of the PCB board that was built.  The skewed lines are a fault of the ExpressSCH editor when it exports the layout into a BMP file.

Circuit used to interface the HMR3100 Digital Compass to a computer