Summary: Today, we determined what kind of gearbox to use for the wheels. We settled on the Tamiya double gearbox from Pololu shown below.
The two DC motors in this set are rated for 3-6V.The reason this gearbox was decided on was that is is light, it meets our requirement of being able to adjust the speed of each motor separately, and it can fit comfortably into our design for the base. One of the benefits of choosing this gear box is that it can be customized for several different gear ratios as shown in the picture below.
Something that will need to be addressed in the future is that the axles for this gearbox are likely to be too short, and will need to be extended. The two ways currently being considered to solve this are scavenging pieces from an erector set, or 3D printing extensions.
Another item that was discussed today is how we plan to power the arduino boards and the motors. It was decided that we will purchase two 4-AA battery holders from Pololu and wire them in series to power all of our boards.
Picture Links:
http://a.pololu-files.com/picture/0J258.1200.jpg?19fc391180b8b92adce3d97e9c62e8f8
http://a.pololu-files.com/picture/0J256.1200.jpg?32be6c1cf4f15c9806ac071db6e22f2a
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