Let's Make Robots!


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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.

sensors for obstacle avoidance robot

hi friends,

i want 2 build a obstacle avoidance robot which wil detect any obstacle on its way and have to reach a goal post some distance away....

i hav tried tsop and ir sensors..but its not working properly ...since i cant able to fine tune the distance in tsop..


so please tell me which sensors would b useful that can also b tuned according to d distance of obstacle..



it would b helpful if u send d circuit design too



thanx dudes

Worm robot

Hey guys, I have 5 standard servos sitting around here and I had some inspiration to make a worm robot.

I did some quick sketches and made a model out of cardboard. Its going to pick up its tail first and put it on the ground  closer to body, then the wave just travels down the body eventually to the head.

With only 5 servos it has 6 segments, 4 up/down pivots and 1 left/right pivot in the middle for turning. Turning might be tricky, so Im going to mock up a better version with packing foam and play around before commiting to it.

workin of ultrasonic sensor

can any1 pls xplain d working of ULTRASONIC SENSOR?

or working of anyother environment independent sensors? 

Servo and picaxe: need resistor ?

hello, i'm trying to use a servo with my picaxe. I tried it on Arduino before, and it worked just connecting the pins at the right position, without resistors.

now i just connected the same way on the picaxe, and it doesn't move.. I then remembered that in the "start here" project, a resistor was used.. So the question is: is it necessary? why do i need a resistor? and how do i wire it ?

Another thing that is probably messing up.. i have the darlington chip there.. shoud i remove it?


thanks :) 

Some considerations about Letsmakerobots.com

Ok, let's start saying that i love this site and i'd like to see it grow. So here comes the things i don't like or that could imho made better. They have mostly to do with the use of drupal and its "flatting" of contents. IE You can't easily say whether you're looking at a robot page, at a forum page, at a blog entry etc, and i find it quite discomfortable.

Light Sensor on a atmega8 based

Hi :)

Can anyone send me a sample of c code to use a Light Sensor (LDR) ?



Capacitor's voltage rating

Hi guys.

Do you know what the voltage rating on capacitors is? My idea is that the voltage rating is just the maximum voltage it can take before the blue smoke comes out, but i'm not sure.

thank you :)