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81
Misc / Help type of sevice robots
« Last post by nightstalker on July 05, 2014, 09:28:58 AM »
Hello forum,
I recently started to learn about robots,
my first task is to write type of service robots by  way of motion (actuators) and an example of each
but I can not find any partition on the net  :'(  :'(
Please send me your in the right place

thank in advance  :)
82
Mechanics and Construction / Re: Can anyone please suggest the name of a motor
« Last post by Ishan on July 04, 2014, 10:57:49 PM »
Suppose the motor is running on 12/24 v and should develop torque to rotate the weight of 3 kg at 30 cm distance.
83
Misc / Cool Kickstarter! Learn about robotics with swarm bots
« Last post by WillJLong on July 04, 2014, 04:50:15 PM »
Hey, my name is William Long and I'm a part of Narwhaledu.

We're a kick ass Kickstarter 8) oriented towards educating all peoples about the cool-ness of robotics and engineering. Our next kit that will be available on Kickstarter involves synchronizeable swarm bots (Small, numerous robots with RGB LEDs that can be individually controlled, and programmed to be synchronized to music, and create some pretty cool formations) that are wayyy cheaper, and equally as cool as current swarm bots available on the market. 

We'll be offering a class, along with three swarm bots all for a price cheaper than what is currently available. We are expecting to launch in approximately three weeks, so spread the word!  :D :D :D . If you've got any friends or family who've always been interested about robotics, but never had a chance to learn THIS IS A COOL OPPORTUNITY!

If you want to get an idea, here's something similar to what we are doing, check out this video that is not ours (YOU COULD LEARN HOW TO BE DOING THIS BUT ON A SMALLER SCALE) : https://www.youtube.com/watch?v=S95KiPws54M

Please take a look at our Facebook page for updates in these coming times (you know, and like it and stuff please): http://on.fb.me/1vlLuzx
Check out our kickstarter page (The big place, where the swarm bots will be first available) : http://kck.st/VyOiPn
And maybe follow us on twitter: http://bit.ly/Tv9aFf

We hope to hear from a lot of you guys soon!
84
Software / Re: Please Help 50$ Robot issue
« Last post by ootbrobo on July 03, 2014, 10:54:42 PM »
You aren't giving us a lot to work with.  We need more info as to whats going on.  So to get the ball rolling I made a quick checklist for you to go through.  This will help us to identify your problem.

Checklist

If you have access to a multimeter
1) While un-powered measure the resistance between 5V and GND, and let us know the value you get
2) While power is connected measure the voltage of your power source (battery I presume) and let us know what you get
3) While powered measure the exact voltage of the 5V rail, and let us know what you get

AVR Studio 4
4) In the programming window there will be options to read the device signature, and the target voltage via the avr isp mkii.  Do both and report back
5a) If you are able try to program the processor. 
5b) Was the programming successful i.e. did the verify check out?   
 
85
Electronics / Re: Robotic arm that copies human arm
« Last post by ootbrobo on July 03, 2014, 10:38:39 PM »
The most cost effective solution I can think of is to use potentiometers at the joints in order to gauge the angles.  You basically treat the pots like absolute analog encoders, but you will have to do some calibrations to ensure your angles are correct.  Do you need me to go into further detail? 
86
Hello to everybody!

My name is Luis García and I'm the developer behind HelloSpoon robot.
What is HelloSpoon? Well, HelloSpoon is a mobile based robot inspired in a baby elephant to spend with children with upper limb difficulties, children with special needs and elderly three of the most important hours of the day for all of us (breakfast, meal, dinner).

Here I want to share with all of you one video of me testing HelloSpoon before doing the real testing with children and elderly, just to be 100% sure that HelloSpoon is safe enough to share some time with other people :-)

https://www.youtube.com/watch?v=qSV-TrKMH3Q

A little thecnical info about HelloSpoon:
HelloSpoon is using as main core one mobile app with PocketSphinx as voice recognition engine, as servo controller I'm using one OpenCM-9.04 type B and as the robotic trunk I'm using the "new" Dynamixel XL-320.

HelloSpoon is a project I've been working on for a bit more than a year, first it was using Dynamixel Ax-12 servos but when XL-320 where presented at the beginning of this year I started to use them because one of the main ideals behind HelloSpoon is offer an affordable, fun and easy to use robot.

Please feel free to leave a comment, if you like it, if you hate it, anything :-)
And if you like, why don't share it in any of your social media? So more people will know that a development like HelloSpoon is being made :-)

Thanks!
87
Mechanics and Construction / Re: Can anyone please suggest the name of a motor
« Last post by bdeuell on July 03, 2014, 05:30:11 AM »
I am unable to discern anything useful from your photo, due to its poor quality and non descript content.

Try and look for any labels or numbers written on the motor, perhaps you can find a part number or spec. Google any numbers/words you find if you don't come up with anything post them here either as a quality picture or typed (ideally both ways) and we can see what we come up with.

If u cannot identify.........then do you know any such kind of motor which can
rotate 2-3 kilogram of weight effeciently?How can i get it?
This is not sufficient information to spec out a motor, you need to identify any static and dynamic loads on the motor, such as acceleration . You also need to identify the speed and voltage at which it will operate. Additionally there are different types of motors to chose from and some may have extra features such as an encoder or brake.
88
Mechanics and Construction / Can anyone please suggest the name of a motor
« Last post by Ishan on July 02, 2014, 11:34:23 PM »
can anyone please identify the name of motor in the pic.
If you know it.....then please tell where is it available (how can i get it)

If u cannot identify.........then do you know any such kind of motor which can
rotate 2-3 kilogram of weight effeciently?How can i get it?
TY.
89
Async requires strict timing on the sending and receiving sides. Each bit has a fixed time period that both sides know. It also uses a START bit to tell the receiving side when the data stream starts.

Sync uses a clock, typically on another wire, that synchronizes the sending and receiving side timing. This way the receiving side knows when a bit is valid from the state of the clock signal.

Now go do some web searches and reading. It can help tremendously if you draw the bit pattern wave forms and send/receive data with pencil and paper. It is not that difficult once you spend the time the understand the concepts.

Then try writing code to do serial transfers by bit banging.
90
I apologize in advance if this seems quite tedious, However I am quite confused with the way robotic I/O works as well as synchronous/asynchronous and I am having a hard time trying to understand them. Please if anyone would be so kind as to explain these three things in a way a beginner can understand I would be incredibly grateful. Thank you for your time.
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