QT113 & Boe Bot...HELP

sbrooks

I'm trying to use the gripper, the QTI line follower, and the QT113 touch sensor all together with the boe bot.

I need the boe bot to follow the line, and pick up an object with the gripper. I want to use the touch sensor so that when it hits the object, the bot knows to engage the gripper. This is my problem. The data sheet and documentation for the QT113 is way too confusing. How can I make this work?

I just need to know how the QT113 sensor work, once i can get it to go on I and O, I can do the rest.

T Chap

It is hard to tell what you mean by how it works, have you put together a board and are having trouble with it? You basically need some type of metalized plate that is your "electrode" so to speak. When something comes near it, the QT outputs a 1. The sensitivity of the electrode is set by the cap on the sense pin. It is rather simple, but the question really is if it will detect the object you are trying to pick up.

Chris Savage

Your duplicate post in the robotics forum was removed. If you need a post moved then please contact a forum moderator such as myself. Cross-posting is not allowed.

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Chris Savage
Parallax Engineering

uxorious

I have a few designs using the QT240 and QT60168 from Qprox. They are rather simple, however, I agree that the datasheets are rather confusing as to determining circuit design. Check out the schematic on page 6 for the QT240 Eval board (that can be picked up at Digikey) www.qprox.com/assets/Downloadablefile/e240_201-15466.pdf I have one of the older versions that I didn't attach to the plastic cover and I actually use it when prototyping.

I also have 3 designs using Cypress PSoC Cy8C2143424. They work much better then the Qtouch parts, but require programming as it is an mcu. One of my Cypress 2 button boards has 7 total parts. The two major advantages are that the PSoC Cy8C2143424 is cheaper than the QT240 AND gives you much more versatility as an MCU.

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~~ dRu ~~

sbrooks

I don't know how to hook it up with a boe bot using the "Board of Education" Rev C.

I know the actual sensor goes between Vdd and Vss, but I dont know where the capacitors go or what to use to sense and where that goes. I'm completely new to robotics and electronics. The information that parallax gives is extremely confusing.