Let's Make Robots!

Suggestions on choosing motor

Hi

Im considering on buying the following motor for my project.

http://www.pololu.com/catalog/product/1105 

Quick specs : 12V, 150 RPM, 195 oz-in torque, 67:1 ratio


This may be not the best for a small robot that i plan to build initially, considering the excess torque generated; However, i do plan to come up with a mobile platform for mounting a laptop (perhaps for telepresence) and i reckon these may prove to be useful then. I did a rough calculation based on such a load (about 3kg/6pounds) from http://www.societyofrobots.com/RMF_calculator.shtml using 4 such motors and it works out well.

Suggestion/comments please on this. Also, if i need to connect this to the arduino mega, how would i do it and what would work out best (ie motor shield etc)?

Thanks very much
Felix

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Hmm...okies..many thanks for the info robologist.  will look into it.
Looks like the Dual MC33887 Motor driver carrier is what should be used on these motors. I do not know of a Arduino shield that has drivers capable of a 5 A stall at 12 volts. The MC33887 fits well to cover that.