Let's Make Robots!


Annual Online LMRobo-games!!!

What if somebody makes an annual robo-games for LMR members that is held online? just like Robotgrrl's robot party but with games and stuff e.g. online robot racing, online robot chess games(for those who do have chess playing robots, and connect them o the internet and play with other people), robot catwalk, coolest robot of the year...etc. and the prizes would be certificates that can be sent and print by the winner, or stuff that i don't know.

so, anyone interested in this kind of concept?

An ATmega328 and L293D based variable speed and direction motor controller
NTRODUCTIONThe GOduino II is a self-contained Read more
Sings, recognizes faces, recognizes speech
Using a
I've been building Robot Betty9 for about 10 years. She has an Arduino, a Basic Stamp, A Vex for her power rollerskates, and uses an EZ Robot board for AI, and face … Read more

Robot Betty9 is ALIVE

My robot betty9 is really cool. I built her over several years. She sings at the Riverside Robot Expo.Robot Betty9 - humanoid

RC lawnmower for cut the grass from my android phone !
Using a
Hi everybody, First i present myself, so i am a 19 years old boy from france, i am actually studing at the university in tours ! I like technologics hackings and i … Read more
Grabs, holds, drops, point finger...
Using a
Here is "InMoov", the robot you can print and animate. You have a 3D printer, some building skills, This project is for you!! This is a hand builded for a job … Read more
Balance to one leg, move hand, move head with Power Led on
Using a
Hello everybody,I am back one year later, with my latest construction Red Dragon biped robot http://letsmakerobots.com/node/27414. After my second construction, … Read more

Micro Magician robot controller - I can finally tick the project complete box!

I started designing this controller in December 2011. After 4 months and 2 previous revisions it will finally be shipping out April 2012. I think this is DAGU's best Arduino compatible robot controller yet!

Designed for small robots using small batteries, the Micro Magician is a 3.3V controller running at 8MHz.
Working from 4.5V to 9V means this constroller can run from a single LiPo cell or 3x NiMh batteries.
Reverse polarity protection means no blue smoke if you get your power wires crossed (reverse polarity diode rated at 3A).

TITAN robot

This project is HUGE. Lets start form the begining, I am a university student and for my final project I wanted to do a big robot, that is untill I found out that the university picks a group of projects and you choose one, so I've decided to make it anyway. 

UPDATE: New post has me controlling servos with my arms!!! check it out at my blog

Gears and gearboxes. What do you want for your robot?

Sometimes when your building a robot you will need gears. Although there are plenty of ready made gearboxes on the market they will not always fit your needs. I have been looking at puting together a collection of gears, shafts and even small bearings so that you can build you own gearboxs.

I started off with the green bevel gears shown below, they have big, strong, chunky teeth that are hard to break. These allow you to have a 90° output.

Wild Thumper goes Wild hunting Lions in Africa!

I heard through the grapevine (amando96, Gareth) that a Wild Thumper Chassis was being used to photograph wild animals!

UGV trainer kit - Unmanned Ground Vehicle

Typically when I hear the words "Unmanned Ground Vehicle", I tend to think of military and off-road vehicles but these days big companies are investing millions of dollars on cars that can drive themselves.

This kit is an affordable beginners kit to help students and hobbyist learn the basics. Using the Arduino compatible Micro Magician robot controller with it's library of basic control functions ensures an easy and fun learning curve.

Little Black Duck - 12g, 2Kg/cm miniature servos from DAGU

Have you ever built a robot and then found your miniature servos were not quite strong enough?
Get yourself a flock of ducks! DAGU's little black ducks!

DAGU are now selling a 2Kg/cm servo that is only slightly taller than a standard miniature servo. The height difference allows for thicker, stronger gears and a bearing to support the load.

Polycarbonate 90° bevel gears with aluminium mounting brackets

When you build robots, sooner or later you will need a 90° bend in a drive shaft. Crown gears are fairly common but the teeth are relatively small and strip easily.

DAGU have now produced some relatively small, polycarbonate bevel gears to help solve your gear train problems. Unlike crown gears, bevel gears have a longer, tapered tooth that is much stronger and harder to strip.

Magnetic servo clutches from DAGU

After years of being frusatrated by stripped gears in my servos I have finally done something about it. DAGU is now producing servo clutches to suit 8g and 9g miniature servos.

Unlike normal servo savers, Dagu servo clutches can be continuously rotated without damage to the clutch or the servo. They look like a servo horn but are a few millimeters thicker. They can be configured for both standard and continuous rotation servos. Here are some common configurations:

Robot position localization using Monte Carlo filter

I am taking Udacity's "Programming a robotic car" free online class and I think it is a great resource for all robot builders! Since the beginning I have seen a lot of question about the way to try algorithms we are learning with real robotic vehicles.

Building a line following robot Need help with programming


#define INA_2   10   //This is the left forward control of the robot, I defined each pwm pin that is connected to the arduino

#define INB_2   11   //This is the left backward control of the motor, e.g set this high and INB_1 high and others low you will do a reverse

#define INA_1  5    //This is the right forward control of the motor

#define INB_1  6   //This is the right backward control of the motor





Navigate around via infrared
Using a
This is my first robot ever. Read more

Driving a motor with solar cells (without a solar engine)

What I want to do is this: I have a basic bicore hooked up to a vibration motor.  He kind of flops around, but it isn't totally random.  Anyway, I was wondering how I could power him with some solar cells that I have without using a solar engine.  If that's possible, I would really like to hear some ideas.

Building the perfect Beast (robot chassis)

2012 may be the year of the Dragon for China but it is the year of the robot chassis for me. I am trying to create a new range of robot chassis's and I'd like to know what features my robot building friends would like to see in a chassis. Obviously low cost and high quality are preferable but what else?

For example size? As far as I can see there is already a range of sizes on the market. Is there a size that's missing? I was looking at some cool wheels that were about 250mm (10 inch). Would you want a huge chassis and for what purpose?

Sneak Peek: Jamie's Awesome Robot Toy

Some of you may know user Jamie, who has posted here occasionally, but spends most of his online time on his YouTube Channel. There he posts about his Giant Robot Project and other amazingly cool stuff he does.

infrared sensors

I've got two sets of phototransistors and infrared emitters put together to make two IR distance sensors. They are both connected in the same way, both powered by my Arduino Uno, both with the same resistor, etc. But when I check the values I'm getting from them, one of them ranges from about 980 - 1010, with the higher value closest to the sensor. The other, however, goes from about 350 - 570, with the higher value the furthest from the sensor.

It uses a Parallax Basic Stamp and four servo motors. It will use a SOMO 14-D to read the recipes aloud. The buttons are going to be used to control the reading of … Read more
Given a priori knowledge of the environment and the goal position, mobile robot navigation refers to the robot’s ability to safely move towards the goal using its … Read more

Cheap Junk

Hello, I'm a college student from the US. We have a local resale store called "Goodwill". You can buy RC toys (and other stuff) by the pound. The cost is like $0.70 cents per pound (+/- a pennie or two) The store has 100's of bins and they dump donated stuff in them. Then you walk around and dig for your treasure. I have purchased a few RC trucks and a tank for less than $1 USD each. So keep this in mind where you live as there might be a place like this in your town for you to scrounge cheap robot fodder.