qti vs encoder kit

technoweasel

What is the difference between the $40 robot encoder kit and 2 $6 qti line sensors? Wouldn't the qtis work for encoding, too, if the wheels were covered in white paper, with eithor the holes cut out or black lines on the disk?

No offense was ment by this question, the encoder kit just doesn't seem·to do more than the qtis. I am short on money,·and would be willing to compromise on lesser sensors if they did the job.

Any help would be appreciated.·

Mike Green

I think the main difference between the wheel encoder kit and two QTI sensors is that the wheel encoder kit is ready to go. It comes with instructions. It's all tested and comes with sample code and finished documentation. It has all the pieces you need to make it work. "sweat equity" has a price. If you know what you're doing and you have the time and energy to invest, by all means, give it a try. It'll probably work just fine and you will save money.

technoweasel

Thanks. The only potential problem I see is that the Stamp might not be able to keep up with the sensors, especially at higher resolutions or when it is busy pulsing motors or checking for PC communication. I should think about getting a servo controller in the future.

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There are 10 types of people in the world, those who understand binary and those who don't.·· -a poster I saw

Ugha

A second stamp works just as well... and its not that much more expensive than a servo controller.

Phil Pilgrim (PhiPi)

One further difference between the encoder kit and the QTi sensor, is that the encoder kit uses modulated IR to minimize interference from external sources, such as fluorescent lights.

-Phil