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Author Topic: Beginner Needs Help !  (Read 1165 times)

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Offline ipaodTopic starter

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Beginner Needs Help !
« on: April 04, 2010, 07:52:45 AM »
Hi ! I just came across this website in search of building a RC robot . I want to know which hardware to buy for building
my own robot.

- It will be rectangular in shape 6 inch in length , 9 inch in breadth and 4 inch in height or smaller ( POSSIBLE ? )
- 4 wheels ( 2 in the front , 2 at the back )  more if needed .
- Must be able to climb up walls flawlessly with luggage and ceiling with no luggage ( POSSIBLE ? )
- A folding claw with good grip and capacity of 4 kg ( POSSIBLE ? ) 2 feet or more or less .  
- Speed of about 13 mph ( POSSIBLE ?)
- Tiny camera with reciever to view video and sound ( POSSIBLE ? )
- Led to view in the dark ( Switched on by controller )
- Controller with range of 1 km +
* Extra * - Removable lazer or Airsoft Gun  :P

Can I Have The Links To Buy The Materials Capable Of This ? World Wide Shipping  ( Will Buy it in a few months )

My Budget Is 1000 Dollars .

I Have Tried Ways Of Earning More But I Am Only 13 But I Will Try .

THANKYOU FOR READING , PLEASE COMMENT BELOW ! :)
« Last Edit: April 04, 2010, 12:50:16 PM by ipaod »

Offline SmAsH

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Re: Beginner Needs Help !
« Reply #1 on: April 04, 2010, 04:33:17 PM »
Hi,
I don't want to be the one to crash on your party but i take it you haven't had any experience with robotics before?
Most of things you mentioned are out of reach for both your experience and budget.
Quote
- It will be rectangular in shape 6 inch in length , 9 inch in breadth and 4 inch in height or smaller ( POSSIBLE ? )
- 4 wheels ( 2 in the front , 2 at the back )  more if needed .
These are easily possible, but what kind of steering to you wish to have?

Quote
- Must be able to climb up walls flawlessly with luggage and ceiling with no luggage ( POSSIBLE ? )
Can you do either of those things? This is fairly impossible, for a beginner anyways...

Quote
- Speed of about 13 mph ( POSSIBLE ?)
This is possible but i would suggest going slow at first. Just to make it easier.

Quote
- Tiny camera with reciever to view video and sound ( POSSIBLE ? )
Definitely possible, just get a wireless camera and plug it into your tv or pc.

Quote
- Led to view in the dark ( Switched on by controller )
Easy, led hooked up to a digital pin.

Quote
* Extra * - Removable lazer or Airsoft Gun
Achievable but difficult, consider getting the base done first then attempting this.

I know i might sound a bit harsh but this is fairly impossible for most of the aspects of the robot you wish to achieve. Start small and read up on the tutorials on this site first and you will get a better understanding of robotics and what it entails.
Howdy

Offline Metal Slug 2

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Re: Beginner Needs Help !
« Reply #2 on: April 04, 2010, 07:18:21 PM »
Like SmAsH commented, this project would be quite difficult.  But, if your really interested, here is a list of recommendations.

For starters, you will need a radio with many channels to cover all the functionality you would like to include with your robot.
- 2 (minimum) channels for the two main motors or servos used for driving around
- 5 channels for the robotic arm (assuming a 4 DOF (degree(s) of freedom), with 1 channel used for the servo controlling claw movement)
- 1 channel for the LED
- another X many channels for controlling lasers, airsoft gun, and wall climbing...
basically, your looking at a radio with a minimum of 8 channels.

Next comes the problem of how you are going to 'drive' your robot around.  First of all, if you even want a chance at traveling at 13mph, your going to need to use a couple of DC motors, a gearbox, and an a couple ESC's (electronic speed controller, for use with your radio).  That setup may get a little pricey, so you can always fall back on using a couple modified servos.  A modded servo is basically like the DC motor, gearbox and ESC setup, except in a small neat package.  The only drawback is that servos are relatively slow.

So you have a radio and a drive setup complete, now on to the 'extras' you want to add to your project.  Lets begin with the 'folding claw' you wish to include.  First of all, a claw capable of lifting 4kg's would require some Beefy servos, and a beefy battery: which will end up costing a fortune.  Building your own may be a little over your head, so here are some links to places where you can purchase some...(or collect design ideas).
robotic arm kit:

- http://blog.makezine.com/archive/2009/11/new_in_the_maker_shed_robotic_arm_k.html
- http://www.thinkgeek.com/geektoys/science/b696/
- http://www.lynxmotion.com/Category.aspx?CategoryID=27

If you decide to build your own arm, I strongly suggest looking at the following tutorial:
- http://www.societyofrobots.com/robot_arm_tutorial.shtml
You can also just buy a 'claw'.  This:
- http://www.lynxmotion.com/Product.aspx?productID=14&CategoryID=
- http://www.lynxmotion.com/Product.aspx?productID=160&CategoryID=
Please note that neither the kits or just the claw would be capable of supporting 4kg's.(only 100g actually...)

Now for the camera.  Shop around or just e-bay for one. here one link:
- http://shop.ajoka.com/product.php?productid=16170&cat=255&page=1
- http://stores.shop.ebay.ca/dreamdigital09__W0QQ_sacatZdreamdigital09Q5fQ5fW0Q51Q51Q5farmrsQ5A1QQ_sidZ794993415?_nkw=wireless+camera&submit=Search

Climbing up walls.  This will be by far the most difficult challenge of all (no offense, but i doubt you will get anywhere close to wall climbing...) but again, here are some resources:
1. you can use a (brilliant) vacuum suction idea: http://hacknmod.com/hack/human-spider-climbs-up-walls-using-a-vacuum-cleaner/
2. electro-adhesion: http://www.hizook.com/blog/2009/08/06/electroadhesive-robot-climbers
4. "tornado in a cup", also a vacuum suction concept: http://news.cnet.com/8301-17938_105-9737761-1.html


Links:

You can buy radios from here: http://www.towerhobbies.com/ or here: http://www.servocity.com/html/transmitters___radio_packages.html
Make sure you select a ground frequency crystal, i.e a 75Mhz crystal: any channel from 61-90. See here for more details: http://www.easyrc.com/radiosystems/radiosystems3.html

A good place to get cheap servos:
- http://hobbyking.com/hobbycity/store/uh_index.asp
For the arm/claw:
- http://hobbyking.com/hobbycity/store/uh_viewItem.asp?idProduct=6221&Product_Name=Towerpro_MG996R_10kg_Servo_55g_/_10kg_/_.20sec

How to modify a servo for continuous rotation (if you choose this method for driving):
- http://www.flickr.com/photos/randomskk/sets/72157605559564231/

Batteries (make sure you buy a charger as well):
- http://www.all-battery.com/index.aspx

LED's, just buy from e-bay.

Good Luck!

Offline ipaodTopic starter

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Thnks
« Reply #3 on: April 05, 2010, 04:44:39 AM »
Thanks!

 


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