Need Help for QTI Sensor Project!

ntshkhan

I am doing a science fair project on the boe bot. I am using 4 QTI sensors to line follow various line. I was told and found in my research that if programmed right, the boe bot using the 4 QTI sensors can detect different shades of gray. I was wanting to use this for different color since each color has a different reflectivity. In my research I have not found how to program the boe bot to do this. If any one can give me pointers on how to program this or any information on this it will be greatly appreciated!

Thank You,
ntshkhan

Franklin

The demo program found on the product page will read the raw value from the sensor and you will need to find the values produced by each color and then write code that makes use of this information.

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- Stephen

SRLM

There are two methods: use an RC type circuit or use an external ADC. I believe the RC circuit is described in the QTI product documentation. An external ADC (such as the MCP3204 from Parallax) would work, and there should be some sample code that you can use to get that done.

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ntshkhan

Thank you for you inputs. I actually tried the documentation on the product page but I cannot get it to work. I get the sensor to read but I can't get it to display the raw data. If you can give me any pointers on that, it would be awesome.

Thank you,
Natasha

Franklin

I guess the next thing is to show us the actual code you are loading into the stamp. Click the post reply button and use the attachment manager to link your code. Also clear pictures of your circuit would help.

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- Stephen

ntshkhan

Here is the documentation code I've been using. I can get it to read but not report the raw data.

Natasha

Franklin

Where did you get this code I could not find it. What is the ? for in your code and where is the pause between the high and the rctime?

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- Stephen