
rgordon
Here's the problem. Magnus will be mostly remote controlled as far as driving him around, making his arms move, waist rotation, neck rotation and such. However, certain features would be helpful if they were automated. Two such items are the neck and waist. If, for example, I rotate the waist via R/C to the right or left and then want to center it straight ahead again I want it to do this automatically. This would be more simple if I could use servos. But, I am having to use gear-motors due to his large size. I need some kind of feedback circuit or whatever....
I was thinking of maybe using an EZ-B and some type of slotted IR sensors placed at certain locations in the ARC of the waist or neck travel zone.
Any ideas for circuits, parts or mechanical stuff out there in forum land?
All ideas welcome!
Here pictures of my smaller bot T.E.C.H. His waist is the same as Magnus except lots smaller. It is the same design with the same motor and cog and belt.
How many teeth are on the 3" Cog & how many are on the belt? And how many degrees of rotation do you want the joint to have?
I'm on my iPad so I don't have a pic. But if you made raised and lowered contour cut of wood, the switch would short in different positions. That would tell your script to stop the motor.
Another sensor I think I saw on ebay was a chip that is super accurate at sensing the direction of a tiny bar magnet rotating above it. You could put the magnet on the rotating part and the chip on the non rotating part.
Ah ha! I found it. Ebay link
I hope that helps.
The little variable resistor will turn with the body, and that adjusts the voltage to the EZ-B. Now the EZ-B knows exactly what position the robot is in.
what I'm looking at.