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Offline sotuTopic starter

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Need professional help!!!
« on: April 04, 2007, 03:41:24 PM »
Can anyone PLEASE explain me (Easy) not to advancedso i cant keep up how to wire a battery to a Motor, but with driving it with a remote? So the motor won't rotate when i wire the battery to it but when i press the button on the remote?! ???
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Offline ed1380

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Re: Need professional help!!!
« Reply #1 on: April 04, 2007, 04:19:20 PM »
do you have a receiver on the vehicle? into the receiver does the power and ground, and from there the servo's and whatnots connect
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Offline jshalcott

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Re: Need professional help!!!
« Reply #2 on: April 04, 2007, 10:12:48 PM »
The easiest way to do this is use modified servos as your motors, so all you have to do is hook the battery into and plug it into the r/c reciever. There is a way to do it with an motor, but that takes an motor controller or and ESC and also some servos and a some kind of a switch or a relay.
If your going to have a small robot go with the servo, if medium or large use the motor idea
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Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #3 on: April 05, 2007, 03:48:40 AM »
I would say its medium, and i cant put in a servo now and remove the motor. I found it kinda confusion the way u explained how to connect the motor (9V) to a battery and at the same time connect it to the controller. It would be great if some of u could make a painting in "PAINT" where u draw all the pieces and show me with arrows where to connect the wires.



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Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #4 on: April 05, 2007, 03:50:54 AM »
ed1380: right now i dont have a wireless control so i do not have a reciever i just got wires coonected directly from the controller to the motor(S)
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Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #5 on: April 05, 2007, 07:05:33 AM »
No one knows how to make a battery stand on the robot and drive it without having the batteries in the control?
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Offline ed1380

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Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #7 on: April 05, 2007, 09:06:27 AM »
Thank u soo much for posting that link to me..:D i was looking for something like that
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Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #8 on: April 06, 2007, 04:43:16 PM »
A little mistake, the bot he maid (the link u gave me) the controller wasen't wireless..!
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Offline Somchaya

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Re: Need professional help!!!
« Reply #9 on: April 06, 2007, 05:20:20 PM »
I believe Admin has a tutorial on his site about making wireless robots. I've not done it before myself, but some ppl have discussed it in the forums, you can probably find their threads around the forum, or try the search function.

Basically, if I'm not wrong (I'm a noob in this), you need a transmitter on your controller, and a receiver on your robot, and if you use servos the output of the receiver can be fed directly to it, since it's a PWM..
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Offline ed1380

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Re: Need professional help!!!
« Reply #10 on: April 06, 2007, 05:35:22 PM »
Sorry, I though you wanted it tethered.
For Rc- hack apart a rc toy, take controler board out out of the car and put it in the robot. cut the wires to the motors and solder your motors on. if you need more functions do it again, but you'll have to make a custom remote with both controler boards in it.(make sure they're diferent frequencies) 27, 49 are common.

or

buy remote with receiver with as many chanels as you want and plug the servo into the receiver(it should just plug in) then either use the servo horns to mechanically activate switches(best choice) or put a relay instead of the motor in the servo
« Last Edit: April 06, 2007, 05:36:14 PM by ed1380 »
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Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #11 on: April 07, 2007, 04:29:52 AM »
But i dont have a servo i have a motor..:(
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Offline ed1380

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Re: Need professional help!!!
« Reply #12 on: April 07, 2007, 05:26:00 AM »
Quote
For Rc- hack apart a rc toy, take controler board out out of the car and put it in the robot. cut the wires to the motors and solder your motors on. if you need more functions do it again, but you'll have to make a custom remote with both controler boards in it.(make sure they're diferent frequencies) 27, 49 are common.
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Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #13 on: April 07, 2007, 08:32:35 AM »
Ok, thanks. I got some big plans going on now for a 2 wheeled robot..:D
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Offline Hal9000

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Re: Need professional help!!!
« Reply #14 on: April 07, 2007, 11:39:28 AM »
But everything youve said IS a RC car, am I right?
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Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #15 on: April 08, 2007, 04:03:17 AM »
yes the plan is a R/C car. Yesterday i visited a Hobby store and talked to the worker about what u need for robots. He sold some pretty strong Motors but i coulden't buy them couse most lickely they would burn up my eletric card!
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Offline ed1380

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Re: Need professional help!!!
« Reply #16 on: April 08, 2007, 10:23:35 AM »
heavy duty h-bridge should do the job well
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Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #17 on: April 08, 2007, 02:15:23 PM »
apparden?
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Offline Hal9000

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Re: Need professional help!!!
« Reply #18 on: April 08, 2007, 04:11:34 PM »
Look up H bridge on google
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Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #19 on: April 09, 2007, 09:14:21 AM »
I have done it now but i cant really understand what it is! ???
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Offline Hal9000

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Re: Need professional help!!!
« Reply #20 on: April 09, 2007, 11:47:51 AM »
It's all about applying a voltage level into the H bridge to allow it to go forward, backwards etc

First link I got on google explained it really well

Give it another go

http://www.dprg.org/tutorials/1998-04a/
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Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #21 on: April 09, 2007, 01:21:24 PM »
I got it a little better now but i cant wait uintil i know how to wire up an R/C controller to a robot making it a wireless controlled robot..!:D
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Offline ed1380

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Re: Need professional help!!!
« Reply #22 on: April 09, 2007, 04:50:11 PM »
if it's wiresly controlled by you it aint a robot.
trasmitter>>>>receiver>>>motor controller>>>>motor>>>wheel>>>>ground
\                               /      \                    /        \                                         /
       buy as a set                  buy one that              I really hope you're at least 
                                          fits your                      smart enough to get that
                                          power needs

Google is your friend
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Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #23 on: April 10, 2007, 01:06:49 AM »
So ure saying if a robot is wiresly controlled its not a robot? What about battlebots then?
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Offline ed1380

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Re: Need professional help!!!
« Reply #24 on: April 10, 2007, 02:44:08 PM »
IMO it's not a true robot, but everyone has their own opinion.
and that^ is mine.
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Offline nanob0t

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Re: Need professional help!!!
« Reply #25 on: April 10, 2007, 04:00:20 PM »
It's a robot, it's just not autonomous.  Yes, I don't know where my post went, I thought I was the first one to post.  I explained all of this, I guess I forgot to press the [Post] button, oh well.

trasmitter>>>>receiver>>>motor controller>>>>motor>>>wheel>>>>ground
\                               /      \                    /        \                                         /
       buy as a set                  buy one that              I really hope you're at least 
                                          fits your                      smart enough to get that
                                          power needs

That's basically what I said.  You have a transmitter that sends out a signal.  In other words, it's your remote.  This I would assume you are using RF.  The signals from the pushing the buttons or moving the joysticks sends out and the reciever picks it up.  This will take the signal and send it to your motor controller.

Motor controllers can get quite pricy $50 - $100 where I look.  I would recommend you use DC motors with something connected to a gear box, so you get your torque and velocity you need.  Also, you can use an H-bridge to control DC motors.   I can't quite find the Dual H-bridge I use.  I purchased it off of www.lynxmotion.com .  A Dual H-Bridge allows control of two DC motors, which is probably what you are running.  They can be bought pretty cheaply ~$20, and are very easy to use.  Making your own isn't difficult either.

Following that it's just motors.  There's a very good tutorial on this website with practially everything you need to know when considering wheels and motors.

Have fun

Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #26 on: April 11, 2007, 01:59:26 PM »
Ok thanks, if u could visit my "Need help!" In Electronics and help me out there it would be great..!:D
« Last Edit: April 13, 2007, 07:24:55 AM by sotu »
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Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #27 on: April 13, 2007, 07:27:42 AM »
Im telling u here like im telling on many of my other posts. I may ask stupid and have hard to take in information. But isen't that what this forum is all about? Helping those who need help? And right now i need a lot of help when im making robots. Couse all knowledge about robotics i got is the one that i have thought my self to. I haven't any book/computer knowledge at all! :(
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Offline Somchaya

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Re: Need professional help!!!
« Reply #28 on: April 13, 2007, 08:09:35 AM »
Couse all knowledge about robotics i got is the one that i have thought my self to. I haven't any book/computer knowledge at all! :(

 :) That's exactly why we're recommending some books and websites for you to read up in. While we may be able to answer the questions, the books/sites are very well-written and will probably do a much better job than we can. It's best that after you read a book or two, or as you're reading it, ask questions to clarify some of the stuff the books talk about.. That way, you won't have to wait for ppl in the forum to answer questions (since the books most likely can) and you can get clear direct answers for the stuff you need clarification in.

Also, besides the books that were listed in the other thread, I also recommend using wikipedia, google, and howstuffworks.com. I've personally learnt a lot from wikipedia and howstuffworks, and google has basically everything if you search hard enough (and you're lucky).. Howstuffworks tends to have very simple-to-understand descriptions, and lots of illustrations, which is very useful to get an understanding of a new topic. Wikipedia usually has more information, but sometimes that can be intimidating at first.

Good luck!
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Offline sotuTopic starter

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Re: Need professional help!!!
« Reply #29 on: April 13, 2007, 09:07:02 AM »
Thnx for all ure help, ure really helpfull..! ;)
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