Let's Make Robots!

balance

gyroscope source recommendations?

Hi all, searching the site didn't give me much on gyros aside from the MEMS gyro sensors.  I'm interested in good old fashioned spinning chunks of metal :-).  I guess these could also be called flywheels, though ultimately I'm aiming for a gimbal mount active gyro.  Anyone work much with them in robotics projects?  

I'm designing a robot and trying to get a handle how much help they can provide to balance something tall and heavy... e.g. if I use a 20lb gyro at X RPM how much torque could it provide, etc.  

Walk forword,back.left,right,balance one leg, up-down 1 or 2 leg,Turn right-left,Control With Bluetooth
Using a
My new Biped Robot "Red-Dragon V3"   what's new -Remove the camera Read more
This is Tilter, my rideable self balancing robot. I've been working on this here and there for a good few months now, with a total ban on other personal projects, … Read more
This is the first prototype of the Balancing Robot. In this version , I used two sharp sensors to control the motors.this is as first step till the IMU comes from … Read more

Discuss general guidelines for self-balancing robots

I'd like to start a discussion to collect general knowledge of what to do and what not to do when building a two-wheeled self-balancing robot (SBR for short).  My hope is that this thread can become a somewhat comprehensive set of guidelines to help beginners and non-beginners build their first balancing robot or  achieve a more stable and successful subsequent design.  Things that I would like to understand include:

Robots With Legs; How to Walk or Run

Does your robot walk like this? http://www.youtube.com/watch?v=WTHI8o5ZOFk&feature=related Notice the heavy jarring to the machine and to the inhabitants inside. This jarring is not good for the machine, especially at the joints and may eventually break  something.

OK, I have just given up making a balancing robot. Ever.

Making a balancing robot - or even dreaming of making one just lost it's appeal.. because I will never make anything like this.,

Idea: A simple way of doing balancing

I was just cleaning up my desk (a little anyway), and found myself sitting with the guts from a servo.

In essense I had:

A potmeter. If it was turned to one side, a motor would turn to one side, and vise versa. A little turning = a slow motor, hard turn = fast motor.

Hmm.. interesting..

Now, what if I was not turning this potmeter, but a simple spinning disc, acting like a simple gyroscope was attached to it?

Then if the whole thing was tilting in one direction, a motor.. OR a complete servo (with guts taken out) would turn to one direction.

Balances on 2 wheels, r/c controlled
Using a
      Well I am not sure I understand the phrase 'time to build' but that would be the time it took me to cut the parts and mount the motors, getting it to … Read more
Updated with a 2nd video! Code is now uptodate and can be found at: code.google.com/protobot. Read more

self balancing bot

check this Self-balancing robot on instructables. It doesn't stand upright for very long, but it's a very good starting point, IMHO.
Accelerometers are very exciting little things. When I say "little", I mean it, as they usuallyfits 4 or more on a finger nail! And each typically has some 7-20 … Read more