Let's Make Robots!

For Halloween I Gave My Robot a Brain, or Fun With a Backpropagation Neural Network

I’ve long been fascinated by the concept of artificial intelligence and its application to robotics.

C328R camera and Arduino

Well I've decided to replace my 2.4 ghz wireless camera on Ardbot with this guy:

JPEG Color Camera - UART Interface

While it isn't as capable as the video camera I had planned to use, it has the advantage of having a serial interface that can communicate with the Arduino, uses 3.3v, so my hope is to be able to stream the JPEG images via XBEE to my PC.

Raspberry Pi is not a pc :) And neither does BBB or Olinuxino

Hi all!

OK so this is not a rant or maybe it is but here we go. 

Raspberry PI is not your common PC (and this applies to all little ARM based boards popping up lately).

Try running a fullfleged linux distro on it and it will crawl to a slow moving beast, and by fullfleged Linux distro I do mean all those things like Raspbian, Archlinuxarm etc. These things are just normal distros recompiled for ARM.

Behaviour-based design. Subsumption architecture

One ot the most challenging tasks I planned for Hurby project, was to define its behaviour. It should behaves in an intelligent manner, discriminating between different happiness states according with user (my daughters) interaction.

Basically, I wanted that Hurby's happiness will depend on two main causes:

Robot arm design, my ideas and progress so far.

Armpic2.jpg

Building an arm for your robot can be the hardest part of robot design. There can be many different designs besides a humanoid design. For example you might have a CNC style XYZ axis or even a tentacle design where multiple joints are surrounded by cables. For BoozeBot I've decided to go for a humanoid design because I would like him to be able to pick things up like a person would. Reguardless of your design the first problem you are likely to face is strength vs weight.

M.T.M.P. + Grass trimmer

Well... bad choice of the motor I guess. I use 2 brushless motors from a quadroter.

The motor is getting slow after cutting grass for seconds. If I have it spin freely it runs OK as long as it should. Any ideas??

(I use 30C 3S lipo 5AH, shouldn't be power problem. )

Homemade compound eye

The compound eye from DAGU, designed by Oddbot, is cool and cheap. But I needed a round board to imitate the human eye, so I made one by myself. The IR LED's and photo transistors are the same as in the original design. As I had no PN 100 transistor, I used a BD 139 (the 4 IR LED's draw approx. 100 mA @ 5 V).

Front view of the perf board

Arduino RF remote LCD display of Temparature & Humidity

Aim of Project :- Transmit via RF remote values of Temparature & Humidity to a LCD display.

Why:- because i have always dreaded sending floating point values to a LCD display and

wanted to carve it in stone for other projects i have lined up.

& Why :- RF Links are just so cool 8-P        500ft range is not to be sneezed at......

PID Tutorials for Line Following

Hey there guys. This post is outdated. Visit http://letsmakerobots.com/node/39972 for the updated tutorial.

Hello LMRians,

In this writeup, I will try to create a tutorial for tuning your robot using PID to follow a line. This tutorial won't go deep down into the details of PID and its applications but will just attempt to show how a robot can be tuned with the PID parameters to follow a line.

Sneak preview of T'REX robot tank chassis prototype

 

Inspired by the Rip Saw tank, I have designed a new robot chassis called the T'REX tank chassis. I finally received all the parts for the prototype chassis. The entire chassis including gearboxes and tracks are all metal. The tracks have been anodized a gun metal grey colour.

Mechanical Thoughts

 

     First of all... this blog has been inspired by this thread.

     Here I'll post things that will never be a project in fact and I simply consider it interesting, or is still far from being a project.

     I hope to share ideas and I also accept suggestions.

 

Entry For Oddbots Robot Video Competition

Hi all, it's 2:44 am (yawn), and here is my video.

 

I spent ages trying to work out the music for it only to find out just before uploading it

that Youtube will probably mute it :(

 

Oh well. if it happens i'll try another service.

anyway do enjoy. 

 

Walter's new Navigation System (May I / Can I Go)

So here we go... I have been sick of "regular" navigation for quite a while now (more than a year now). The whole idea of "just keep going and if there is something there, react to it" is just not doing it for me any more. For the last year or so, I have been thinking about and working on a new system of "may I go". The theory is basic: Before you start going somewhere, check that there is somewhere to go! In the system I am using now, a 180 degree scan is performed and the sonar readings and angle is sent to processing.