Whilst searching for a completely different item, I stumbled on this at Cool Components. It's a 60 mm diameter wheel with the motor, encoder and drive components built in, just connect power and data lines and off you go. At first glance it looks expensive at nearly £20.00 but when you add up the cost of individual parts all built in to this wheel, it begins to look very good value for money. Cool Components have a whole list of new products on their home page and it's worth a visit. In fact, I would suggest visiting all of the traders listed on the left every so often as you never know what you might find. In the meantime, here's a video of this wheel in action.
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