Let's Make Robots!


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Decoding IR without INFRAIN

hi guys!

i need some help from you guys. I have found this page, and it has really helped me a lot: http://www.world-educational-services.net/PICAXE%20Infra-Red%20Interfacing.htm

 what i wanna talk about today is the "Decoding without INFRAIN or INFRAIN2", where the author of the page is trying to decode the IR signal coming from his sony remote. Above this is an explanation of how the Sony protocol works.

Arduino: How to make your first robot with..

When writing this, LMR only offers "Start here" - instructions on how to make your first robot, using Picaxe.

"Nebster" wrote to me, and asked if I could do a parallel, using Arduino, and I think that is actually a very good idea (now that Picaxe refuses to pay me commission, haha)

Focus should be on making first timers get a robot up and running at a low cost, and most importantly learn how to hook up motors, a servo, and a analogue input in "no time".

using single resonator with multiple ic's

hi all,

Does anyone know if it is possible to use 2 or more picaxe chips, linked to only one resonator, so they keep time together. I was thinking somthing along the lines of this:



belt track friction

I have bought the treads and wheels from MUTR,  the same ones as used in Fritsl's first robot. I have assembled a robot base using the treads and wheels, and two MFA multiratio gearboxes. the robot goes fine in a straight line, but the tracks have too much grip when it needs to turn. I have tried tape, but it makes the tracks too tight. coating the treads with correction fluid gives some improvement, but still not good enough to turn smoothly.

does anyone else have ideas that have/might work?

Flying bots

I'm working on making my own Robot controlled helicopter. Is there anyway to calcute the wing length of the blade in order to lift the helicopter?

My first robot

I want to build my first robot, and have planed it a little bit like

The Start Here Robot.

It will drag itself using its two front wheels, and a half-of-a-pingpongball.

i want to mount a distance senser on a servo so it can turn.

Should i use i picaxe 28?

Will this projekt even work?

Driving servos

Here ( http://letsmakerobots.com/node/80 ) Frits had mentioned that either Arduino or PICAXE can control such and such number of servos. I'm pretty new to microcontroller world, so maybe my question will sounds a bit stupid... but I don't really get what we mean by saying "can only control X servos"? Does it actually mean, "platform X can have up to N serial outputs"? Because, AFAIK that's what servos are, aren't they?

Now, I can understand that PICAXE has also limitations due to the built-in Basic interpreter; but why Arduino?

Promising Wheel and Track set for bigger, more robust robots

I had an idea for an outdoor ROV and decided that a tracked vehicle would be best suited for the job.  It would need a track set much more robust than the little Tamiya set, but I wouldn't want to drop big bucks on tracks and the YDR tracks couldn't handle wet grass.  I found these.  They look promising for outdoor projects or even just a larger project that might be a bit heavy for the Tamiya tracks.  When assembled the track base would be a bit under a foot long.  This makes way for the use of bet

How did you find LMR?

How did you find let's make robots?

I found it on StumbleUpon, and you?

YES it's a robot, NO it doesn't have a microcontroller

I think we need to get of our high horse here and let snyde remarks regarding our own elitism remain silent..

I have seen several comments here stating that a robot has to have brains to be a robot. Now, where is that rule written in stone? Does it have to run around on tabletops, using skid steering, detecting cereal boxes by IR or ultrasound, have blinking LEDs or follow black lines on a piece of cardboard to be a robot?

L293D question

I´m trying to make my own motor driver, and this is what i could do until now by following some tutorials.

Happens that i can drive the motor in both ways with no problem!

If i connect the servo, and the motor, they both run for a couple of seconds and then stops... i think i should use a power supply for the motor but i´m lost in here..




preparing robot for robo war

can anyone tell how should i make first robot that could possibly give a fight at ROBOWAR

burnt md23 :(

Ok, i burnt my brand new 50€ worth MD23 motor controller. I'm deeply desperate... I was all excited about its arrival with all the RD01 kit, i was all happy about the incoming testing and building and having fun with it, when suddendly all the magic smoke came out of it and dispersed for good. :(
BWAAAAAA :( i'm so saaaad :(

Sniff, ok.. So i'd like to at least have some idea of what happened, becouse i have none.. How can it happened ?
This is the chip that smoked:

Frets on Fire

Hi guys! i want to introduce to you (some already know about it) this game. It's a guitar hero clone, and for the ones who don't know what it is, well, it is a game in which you have to impersonate a guitarist and play famous songs with your keyboard or "toy" guitar. You basically see various kind of notes (which are basically small dots on the screen) scrolling down towards you and your goal is to get as many as possible.

Kind of hard to explain....why don't you give it a go? :D

556 Chip motor driver

Is there any possible way to make a motor driver with  a 556 chip?

Robot Archive

Here is a link to a very interesting archive of as many big money funded Robots that I have seen in one place. Great place to get design idea's and read about technologies the big boys are using.



LHC starts up tomorrow

The large hadron collider gets it's beam on tomorrow....can't wait to see what happens....or doesn't.  :)




Less to do with robotics, but still, something that maybe a few might be interested in. 


Line follower on steroids

Japanese guy made a line following race car. I think theres some kind of race competition.

Checking through his blog hes got a nice machine shop at his disposal too :( Lucky bugger.

Arduino Software Installation

Ok, so I bought my arduino diecimella on the internet, and im currently waiting for it to arrive. However, I want to prepare my comp by downloading the software. I downloaded the "program" to find it was a zip folder. I decided to check its readme to find a link to the website, the instructions  ask that I download a program called cygnus or something, which i did, then it said to download some other packages, only to get a couple programs on my desktop that dont open anything, so I read on, I also have to download the USB drivers, but GUESS WHAT!?

Mini Biped

I've been wanting to see something like this for a long time, and have never been able to make it.

A couple of people probably know games like WarHammer.

For those who dont, WarHammer is a stratagy game played with mini figurines, out of a Fantastic/Midivel times. Those figurines are generaly abaut an inch (about 2.5 cm) high, unless somekind of Troll or something.