Let's Make Robots!


Hello guys, Lots of little projects left on my to-do list. Finally got the bi-ped to walk ( Still wobbly ). Need to complete MBB to follow lines (and solve mazes). … Read more

Unlimited power! But how to put it to good use? (motor torque)

Well not exactly unlimited power, but a lot of power! My wifes lower back is worn out so she can't walk long distances and because not everything is reachable by car we have a foldable disability scooter to overcome that problem. Unfortunately the batteries needed replacement, quite expensive.

The good news is that I now have the old two 12v traction batteries. One can only hold about 60% of it's charge, not of much use. The other is 90%, definitely good enough to use and since the battery is about two times as small as a regular car battery it's perfect for a robot!

Knocks Objects Around the House
Using a
Hello All,   The world is full of obstacles, and Fightron 1.0 here, is ready to knock out some, in his own robotic journey.   After recently building an obstacle … Read more

Researching three-wheeled off-road robots, asking for info.

Hello everyone,

I've been thinking about building a large off-road robot for a while. I want to make it a fast three wheeler that uses two bicycle tires in the front (bmx size) and a smaller child's bike wheel on a caster in the rear. All of the wheels are going to be independently suspended, with leading arm suspensions in the front and a trailing arm in the back. One design goal is to make it faster than a person can run (roughly 10-15 mph).

Hello LMRians, This is a PID implemented line follower using an Arduino ATmega168 clone, Pololu QTR-8RC sensor array, a Pololu TB6612FNG Motor Driver, and super … Read more

Segway Wheels

Hello everyone, 
I'm posting here today because I am currently in the middle of a segway project, and am looking for advice or ideas for one or two of its components.

Testing the wheeled version

As announced in our previous post, we are working on wheeled version of our robot. Tires and shaft adapters are arrived today and we mount them to conduct first test drive. Here are some photos:

QUESTION - Grid tracking robot


I am completely new to robot building and, in turn, new to this forum. I am currently studying Computer Science so I may be able to use some of what I know already to help.


Anyway, I have a basic idea in my head but I am asking for a little help on, how you think, it could work. It seems relatively easy in my head - for those that are used to robot building;


Trundles around attempting to avoid obstacles (and sunlight).
Using a
This is the basic Start Here! robot, whose job is to move forward until it detects an obstacle and then stop and decide which direction it should turn.  So far I … Read more
Drawing on the popularity of the Tiny Tank, I decided that some folks might want wheels instead. I give you, Little Wheels. The Little Wheels Robot is a great … Read more
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

My wheels do not move.

I'm trying to make http://letsmakerobots.com/start

My wheels do not move when I program it. This is the code I use: http://pastebin.com/eZCYiBuv

I'm pretty sure that the pins are soldered correctly to the board. I already re-soldered them 3 times and they look just like they do in the pictures that are in the instructions.

Question for Rover 5 users about alternate wheel options.

SO, having completed my holiday obligations, it's time for a little present from me TO me.  I've been collecting assorted parts, and experimenting with Arduino code and have decided that pretty much everything I want to do with a robot base can be most efficiently, cost-effectively accomplished with a Rover 5, and it's at the top of my "Been a good boy" list.

The only thing I don't like about it is those rubber treads that seem to keep falling off.  And since it's my intention to get the Rover 5 with 4 motors and encoders, I've decided to go with independent wheels.

Navigates around via ultrasound
Using a
This is a very simple robot which only has two wheels made of old CDs. Its brain is a motoruino and uses a sonar to detect and avoid the obstacles. On the video … Read more

tank treads and wheels

hay guys i was just wondering about the advantages of using tank treads and /or wheels....or any other types. efficiency? stability? does it have a large affect ?

thanx for your help


Best robot chassis

Was wondering what you guys thought the best "chassis" for robot development was.  Not looking for electronics or a "kit" but just a platform with wheels (or legs or whatever).  I like the idea of doing my own electronics (processors, sensors, power systems, etc.) and could/would eventually build my own from component parts, but I like the speed of starting with known motor/wheels/platform that are well matched and robust.  I have already fried a servo trying to start with that.  I also figure that by the time I bought motors, plexiglass, wheels, etc.

uses wheels made from plastic bottles
Using a
BOTtle is a robot like many others but with a particularity, the wheels are made of plastic bottles as you can see in this video … Read more
This is an old idea, finally I have the time to show it to the world. The are bottle shapes that perfectly fit together, you will see how easy it is to create a … Read more

Wheels - The Making of Blaster Shark (Sumo)

After the design of the body and motor mounts I can get an idea of what kind of wheels I need.  The things that are important to consider is the width and diameter.  Both are restricted by the dimensions of the the minisumo.  In my case, since the motor shaft is offset, I can go with a smaller diameter wheel and not worry about the bottom clearance of the robot.  But since the motors are somewhat long, I can't go with a really wide wheel.  With this in mind I figured that a wheel diameter of 40mm and a width of roughly 20mm would suffice.

Attempt At Making Robot Wheels

Hey guys,

It has been a while since my last post.  The Vulcan Five is not looking too good beacuse of the PCB fiasco.  I'm trying to salvage that situation, but its going slowly.  So unfortunately for this coming up competition it will not be entered.

However recently I have been experimenting with making my own robot wheels for maximum grippage on my sumos.  Here are some puctures of the results.

Drives until obstacle detected, plus colour object tracking
Using a
I've spend too many years thinking about building my own robot and feel like I've found a group of like-minded folk with this site. :-)  I'd like to share my … Read more

Encoders for servo mounted wheels

I have 2 questions, 
- First, when using a C-stamp (programmed using MPlab) is it possible to track the movement of a continus rotating servo so that I dont need to add encoders to know how  much the wheel has turned?  
This is an example of coding that makes 2 servos turn(if it helps):
void goforth(BYTE lp, BYTE rp, WORD t)
  WORD i;