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I guess what I am looking for is a programmable motor, something running off of a 9 volt or so that I would be able to program to make a certain number of rotations. I would also naturally have to be able to change the number of rotations I
If worst comes to worst, I'm thinking about using a mechanical system for stopping the car, such as a wing nut sliding down a threaded axle as the car moves.
Is an encoder the same thing as a motor controller?
And where might I find one that would limit the number of rotations a motor would make?
Thanks again. Reading this is a bit intimidating.. it seems pretty difficult.
I have a couple more questions though. I read about the encoders, and it seems those are used to measure the distance a robot moves, not tell it to move a certain distance like I need.
Thank you so much! How many of those encoders will I need, cuz it says "If you need a pair of motor encoders for a DC driven two wheeled robot, consider the WW-02 Wheel Watcher Kit. " Or since my wheels will be moving the same distance, will I be able to use one encoder for both wheels (one axle)? Also, what microcontroller could I use to later program the encoder to make a certain number of rotations?
Couple more questions. Earlier, creedcradle sent me a link to a motor driver: http://robotstore.com/store/product.asp?pid=62&catid=1565What is this for? Would it be necessary for my project?
Also, would it be possible to get all of this running with a 4.8 volt battery pack (or four 1.5 volt individual cells)?
Lastly.. do you know if it would be possible anywhere to find a pre-soldered microcontroller, encoder, and the whole deal already attached to some motors, so that I would be able to program it and save some time soldering? If not that's cool too but I'm just wondering if any of you guys have seen anything like that.
Which microcontroller would be compatible with all that?
I still am not really sure if I'll be able to use this to program how far the car should move, not just read in how much it does move.
Will this encoder: http://www.acroname.com/robotics/parts/R253-WW02.htmland this motor: http://www.acroname.com/robotics/parts/R246-GM8.htmlbe compatible with the microcontroller?
You also said that I can store the distance in a variable. For my purpose, I'm going to have about 50 distances I will need it to memorize. Can it store that many variables? Couldn't I also just use some variables like 1, 2, 4, 8, 16, etc. so that like to get 19 cm I would just do 16+2+1?
Do you think that I could power this, along with the motors, with a 4.8 volt battery pack? I know it says 5-10 volts but would 4.8 be enough? Or I am also able to have four 1.5 volts in series to total 6 v, would that be enough?
Lastly, do you think it would be possible for me to only use 1 encoder and 1 motor?
The Orangutan input voltage is 5-10 V, making it well-suited for use with small DC motors and 5- to 8-cell NiCd or NiMH battery packs. The motor driver can supply up to a maximum of 1 A per motor channel, subject to power dissipation requirements.