Let's Make Robots!

Heat Tracking Robot Arm/Head

Ok, I have been wondering if it would be possibly to build a robot head or arm that tracks thermal energy. You know how there are special thermal cameras that show areas of higher temperatures in different colors? I'm guessing those are pretty expensive, so would there be a simpler and cheaper way of building a thermal sensor? I was thinking of PIR sensors, but they can't really sense how hot something is, just if what its looking at is hotter than average.

Festo robotic flexible arm

 

Nice flexible robot arm with gripper. No motors only air pressure.

http://www.festo.com/cms/en_corp/9617.htm

An official LMR robotics comp.

Hello

Most of you know I've had a lot of interest in my cross the gap challenge.

 

So I asked Frits about us having a "Official" LMR online competition at the end of this year. He said he is interested, but has too many obligations to be personally involved beyond giving the final approval, and adding stuff to the home page, etc.

If you want to be involved with exploring this concept, we will have to come up with a new game, and write up the rules, and figure out who's judging the video's, etc. I can get prizes donated.

Working on a PICAXE board for robot building - working on v0.9

I'm getting on with making a small PICAXE-driven board similar to the uBotino. I've got it moving along and am ready for other thoughts at this point.

A quick copy/paste from my blog with a little more info:

The Rev-Ed board is nice but there are a few features I don't care for. My PICAXE 20X2 Robot Builder Board does away with/adds those things. And it's only 50mm square.

2nd ed.-

Quadruped robot kinematics

I made quadruped robot and stuck with kinematics part, problems with center of gravity (Atmega16, 12 servo - current accuracy 5 degrees). I can't get it nicely walking, maybe someone can offer any tutorials for it or ideas?

servo for mini hexapod

Hello,

I want to build a mini hexapod and i would like a suggestion from you for a cheap servomachine (de kserw an to grafw kala auto) to use, which will be sufficient for this project.. I have found these here on my own:

HobbyKing HK15148

HobbyKing 928BB

sg90

mg90

sg91s

PID problems...

Hello guys,

 

I need to make a line follower for a competition...

I use:

Arduino

Ardumoto shield

30:1 reduction motors

QTRA sensors...

 

now following 3pi I got this code:

T'REX tank chassis

It's been a long time coming but the T'REX robot chassis is here!

I've just been testing the final product so I thought I would post a few photos of the new chassis. The chassis is aluminium with a black powder coating. The tracks and struts are zinc with a black anodized finish. The wheels are zinc with a chrome finish.

On-board charger

Hello,

I am redoing the power system of my robot that I built last year to increase safety (preventing shorts, adding emergency cut-off,etc),  convience (adding master switch and switches for each sub system rather than connecting battery connectors) and bling (blue 7-segment displays that show voltage for each sub-system).  

How, When, Damn it, Why do servos jitter?

I've had a lot of trouble with servo jitter lately, I seem so have solved the problem but I'm not sure why it has worked.

servos.jpgAt first I thought it was the power supply being spiked, no amount of decoupling capacitors solved the problem.

I thought it was software and although my code was improved, the jitter continued.

Because I was using optic sensors, I thought fluctuations in the light is causing my inputs to give false readings. Still no luck and I stubbed my toe in the dark.

SpeakJet

Has anyone had any success programming the event phrases into the SpeakJet's EEPROM? I don't know if this is done via a PIC or right from my computer. The software implies that you load it onto the speakjet directly from the computer, but how would I do that? 

Powering Arduino and servos/motors with one supply

Helo, all

I tried to power Arduino (Duemilianove) and servos/motors it controlled with the same battery, but Arduino continuously restarted during the operation. Actually it was a surprise for me, since Arduino already has voltage regulator chip and filtering capacitors in the input circuits...

I solve this problem by supplying them with different batteries, but I don't like this solution. Could anyone help - how to provide single power supply?

Sensing servo feedback

Hi,

I'm new to this forum, robotics, electronics and microcontrollers, however I have been programming a long time and I'm currently studying computer science.

I recently bought an Arduino board with the purpose of making robots for experimenting with my special interest: AI.

I wish to build a walking robot and experiment with varios ways of giving it a nervous system. So I will need to find a way to get feedback directly from the servos, thereby being able to read the amount of stress (load) they experience at a given time.

How far can you get in parts hunt?

Just an hour ago I have disjointed this little peaceful innocent birdy, just for a little switch as I ran out of them and did not want to stop my robot building proccess! I'm a feelingless monster...

bird.jpg

The question of the day:

How far did you ever get in robot building fever? What dirty deeds you did and what sacrifices you put on altar of robot building?

:D

Robotic Ants Farm

Well, Aniss1001 brought up in an other topic the idea of creating a swarm of robots. This reminded me of an idea I had 5 years ago, when I was in the States and building Lego Robots. Funny thing, a quick search on the net at that time revealed several similar projects. Also, my inexperience at that time with non Lego robots didn't let me put it in practice.

So, here's the idea: