Trossen Robotics Community - Project Showcase

[Project] Roz

JonHylands — Sat, 21 Nov 2009 03:36:26 GMT

Quote:

Originally Posted by Noog (Post 36219)

Hi Jon,

That is a great looking 'bot! I'm envious of the quick production time that the 3D printer has given you. Thank you for sharing your project with us.

Did you specifically choose not to instrument the feet with sensors (e.g. strain gauges or even just a simple contact sensor)?

Noog

Yeah, this version of the feet is simply for the flat-floor walking contest we're running this weekend.

Over the next few months, I'm going to design and build new feet that have multiple pressure sensors per foot, with full terrain compliance and linear leg compliance as well.

I have big plans for this robot. See my MicroRaptor wiki page for some of the stuff I'm going to be working on. Specifically, see the AI/Sensing/Navigation/Goals pages for where I'm going to start. The AI-level stuff will be running offboard on a PC, and the motion control will all be on the robot, running on an ARM7.

- Jon

[Project] Accelerometer Controlled Marble Maze

Alex — Thu, 19 Nov 2009 17:38:51 GMT

Accelerometers are definitely a great way to introduce kids to robotics. Nice work Dan! I'm with Adam too, nice touch with the gumball prize:)

Too bad I missed the demo @ iHobby:(

[Contest Entry] Home Built Wireless IP Executor

tonald — Thu, 19 Nov 2009 13:51:21 GMT

Here is my latest video.

MDD motor controller:

32 channels servo motors controlling
4 DC motors controlling.
2 stepping motor controlling.
8 channel ADC
PC side software

MDD Wireless interface type 1:

2.4Ghz transreceiver
used for wireless UART command transmission.

Videos are below:

[Project] Mola Project

Charles — Wed, 18 Nov 2009 03:00:47 GMT

Sorry for the delay in replying. I've been very busy lately with NaNoWriter. Anyway here's an updated part list from all the recommendations I've been provided and the research I've done:

(2) Arduino Pro Mini 5V/16MHz
(2) SFE Polymer Lithium Ion Batteries - 3.7V 860mAh
(2) Pololu 5V Boost Regulator NCP1402
(1) 5.5Ft Weather Balloon
(1) FTDI TTL -232R-3V3 USB - TTL Level Serial Converter Cable
(1) Dynalloy Flexinol Wire 0.005"
(4) SFE Concave Button - Black
(2) XBee 1mW Communication Module
(1) Phidgets Mini Joystick Sensor
(1) Right Angle Pins
(6) PNP Bipolar Silcon Transistor
(2) Dimension Engineering 3.3V 1A Switching Voltage Regulator
Wooden Poles 1/8"
Helium
Wire

I've downloaded the Eagle software and I'll start of the layout tomorrow at school.

[Project] Mech-Zeus/ Axon

rebel — Sun, 15 Nov 2009 19:01:04 GMT

A robot driving a robot, nice :P

Shadowcat

rebel — Sun, 15 Nov 2009 18:58:52 GMT

Here I had to make new upper leg peices, i like the clear poly. I also had to drill out the metal servo horns to fit 4-40s. The regular ones where stripping and seemed weak.

Attached Thumbnails

[Project] Seeker 2x - Mini Sumo

robologist — Thu, 12 Nov 2009 03:58:30 GMT

Quote:

Originally Posted by Adrenalynn (Post 36023)

"Ramming Speed!"

"He's gone to PLAID!"

LOL! Spaceballs quotes for minisumo!

[Contest Entry] Meet Squidword

darkback2 — Tue, 10 Nov 2009 04:35:45 GMT

Months have gone by. I got swamped with work. Somehow I'm inspired to be a good teacher this year. I also decided to run a marathon...which is at the end of this month.

So...finally back to squidword.

Video was an issue for me. Squidword shook his camera to death...he actually shook two camera's to death and got to robogames on camera 3 which he shook to death before the first round...so I've made a few changes.

First I rewrote mechmover from the ground up. I increased the resolution from 128 (midi) steps for each servo to 751. The increase in resolution has made the gates a lot smoother. I also added a lean function.

He is going on a diet of sorts. In the least I will be using a xbee bridge to communicate with the SSC-32 and loosing the PC on his back for the most part, and at most I'll be adding a phidget SBC if I can get the funds together. The priority for me is making robogames 2010...

The video performance over wifi was sketchy at best...so I'm going to try dynamically changing the resolution. I can drop it as low as 32*24 and still get around OK...and then bump it up to 640 *480 for aiming and shooting. I am putting a control for this on the Control PC...(which is a Mac.) I'm also thinking of automating him to various degrees...not sure about that part.

So for now the shopping list is:

2 HS 5990 TGs
2 IR sensors
4 pressure sensors
1 xbee communication kit
1 Phidget SBC

Crazy part...I got an emotiv EPOC...its a headset you can use to read EEGs and control computer apps. I'm gonna try to use it to control squidword...though I'll mostly be relying on the keyboard or a gamepad.

Finally...I got the rockets working...not sure its worth it though.

Issy Goes Fire Fighting

sam — Mon, 09 Nov 2009 23:06:52 GMT

Me too!

The gait is fabulous, Walks great fergs.

[Project] Bheka

rebel — Fri, 06 Nov 2009 18:03:31 GMT

Very nice, looks awsome.

[Project] Hexapod with Terrain Adaption

Xan — Fri, 06 Nov 2009 09:13:56 GMT

Hi all,

Thanks for the reactions.

Quote:

Originally Posted by darkback2 (Post 35901)

so foot lowers until it trips the switch, then stops and holds position...

Yes that is how it works in a nut shell. I�m only using 6 contact (microswitch) sensors on the tars. �Balance mode� keeps track of the average leg height and angle and translate it to the body angle and position. This is going a closed loop setup to keep the body at the same height even when it walks in a hole.

I�m currently upgrading the body angle calculations to make it more precise. This will solve the shaky body shown in the video.

I hope this answered your 2 uuhh� 3 questions ;)

Quote:

Originally Posted by nagmier (Post 35900)

@ Xan awesome work so far looking great... And I love that transmitter(I've read the thread @ lm.net)! one day I will build one!

I just can�t say this enough; the remote is awesome! It gives the precision of a stock RC flight remote but also allows me to send digital signals to switch gaits and modes. It�s open source and runs on a BAP28. So the remote is getting better and better every week ;)

Quote:

Originally Posted by Adam (Post 35904)

This is an interesting project. I also plan to do a form of terrain adaption. Would you mind providing more information about the micro switches?

Sure, here�s a offside link to the build

Xan

[News/Announcement] Phoenix V2.0

Xan — Fri, 06 Nov 2009 08:53:28 GMT

Looks like you can start porting again Adam ;)

Thanks for the kind replies guys!!

Xan

[Contest Entry] Donna The Dead Bot

Adam — Mon, 02 Nov 2009 14:34:22 GMT

Really cool. Did you scare anyone with it this year?

[Project] New Post For Fresh Start On Robot Butler

ROBOTMAN — Sat, 31 Oct 2009 17:50:19 GMT

Perhaps I missed something or I'm just not sure what you guys mean. I believe that if you read my post you will find that I am using an arduino and a motor shield "a slightly more expensive H-bridge" for closed-loop control. Its not stacking a few pic's together on a breadboard cost wise but at around $60 total for a professional board that will have less possible problems I think its a good deal.

[Project] Argos pr1

lnxfergy — Thu, 29 Oct 2009 21:11:21 GMT

Quote:

Originally Posted by Connor (Post 35684)

I thought Fiducial's had to be black and white, or in a white-black box or something... I did do something like this with basic image matching..

A Fiducial is simply a marker or point of reference. The key part though: is that you have to be able to reliably recognize it, hence why many of them are black on white, organic looking things.

-Fergs

RFID based patient Monitering system

ravibabumyself — Tue, 27 Oct 2009 14:18:55 GMT

Hi i am beginner with RFID technology.I am doing project with above name..I am using DT135MIFR rfid reader(serially connected to PC) and philips Mifare 1K or 4K smart card to read and write details of patient into it.

I am thinking of implementing the application using C#.NET.

My doubts are:

how to send RFID commands through serially in C# and the commands should be in string or other format(like Hex).

Is it compulsory to interface Rfid reader with Microcontroller? I mean can we send commands directly to reader and based on commands, R/W operations can be done on smart card.

tell me some basic steps to send commands throug UART and connection to reader to UART.

Any kind of info will be helpful..
Thanking you..

Robo Theatre Movie Mover

Rodger Cleye — Mon, 26 Oct 2009 15:31:33 GMT

I made a Robot Projector for Halloween:

YouTube - Robo Theatre - Movie Mover

Then I chroma-keyed my face on fire to Ghostbusters for content:

YouTube - GBfireEdit

You can sit back and watch the video drinking from your foaming drink safely:

YouTube - DRY ICE DRINK PROTECTOR CAPSULE

And to really get into the Halloween spirit, you can watch this:

YouTube - Halloween Pumpkin Massacre - JibJab.com

Enjoy,
Rodger

[Project] A-pod, an ant inspired hexapod

Adam — Sat, 24 Oct 2009 02:59:08 GMT

Excellent biomorphic design. Truly inspiring!

AIMEC:3 Robot

nagmier — Fri, 23 Oct 2009 00:35:52 GMT

Wow! That looks pretty good! About how tall are you looking? I'm guessing 4-5ft? Will he be a walker or rover? I can't quite tell by the feet I would think you could hide wheels/tracks in there should you want to...

[Project] NanoSeeker

JonHylands — Thu, 22 Oct 2009 23:05:08 GMT

The natural low center of gravity keeps it more or less upright...

- Jon

Arbotix based Quad (unnamed)

DC Robotic — Mon, 19 Oct 2009 19:52:46 GMT

Zenta, Thans for the encouragement. Feet are on the drawing board. You are correct that they will help substantially. I'm thinking they will be like shallow arches (points down) that wil help resist tipping by being nominally oriented perpendicular to an imaginary line between opposite feet. I'm pretty green with IK but i do know that 2dof can be simply solved with trig. I'll be researching the solutions you mentioned.

Phidget SBC powered tank

Robert — Mon, 19 Oct 2009 17:58:17 GMT

Quote:

Originally Posted by Adrenalynn (Post 35027)

Full autonomous non-guided mapping and localization over multiple square mile grid should be a no-brainer.

Oh just you wait. I've been working on some software to interface with a little USB GPS unit I had lying around so that I could plot movement

[Contest Entry] Rise of the machines T-1

elios — Sun, 18 Oct 2009 00:24:55 GMT

you well 4mem? If you want some help programming or anything you have my email, and I think you have my number, so just gimme a buzz

[News/Announcement] My BotBuilder.co.uk project.

Pinter75 — Sat, 10 Oct 2009 00:39:28 GMT

OK, after a long hard slog, the web site is updated :-)

http://www.botbuilder.co.uk

[Project] Light Following Robot + Neural Network

Pi Robot — Fri, 09 Oct 2009 20:40:22 GMT

Glad to see there is some interest in neural nets! Since people have been working on these things since the 1940s, there is literally a ton of material on the web. Perhaps a good place to start for an overview would be Wikipedia. Another good site that has explanations of various learning algorithms is http://www.learnartificialneuralnetworks.com/. And of course, you can just Google "artificial neural networks" and you'll never run out of links.

There are also some really nice machine learning libraries out there. I like Aforge.NET (C#) and EmguCV (C#, VB.NET, VC++). EmguCV is based on OpenCV (C++). Both packages have machine learning routines as well as piles of visual processing filters.

--patrick