motors

I have recently received my order from ebay. A L293D Motor Controller for my first robot. I read the datasheet and other guides but i can't figure out how to use it, please help! I didnt order 2 so i only have 1, if it fries, i cant get another one or i have to make one. :(

We at RobotBASIC are currently working on a RobotBASIC Robot Operating System (RROS).

The full RROS will manage almost any type of sensor allowing hobbyists
without an electronics background to build and program sophisticated
robots.  The RROS will probably be distributed Open-Source to allow
expansion and customization.  We will even allow users to share their
modifications through our web page.  The LIGHT version is requiring
sensitive coding that will not be appropriate for modification, so it will

I have looked at the tutorials from adafruit, such as this one:  http://www.ladyada.net/make/mshield/use.html and I can include the library in my program, I tried the examples and I get nothing. I am using 7.2 volts for my power supply and the motor is from an rc car. I have tested the motors with a different h-bridge that came with my DFrobotshop rover and it works fine.

Guys i got some motors as part of another kit, im just wondering will my picaxe 28 from the SHR be able to drive them ok with out burning out.

All i know about them is whats on this spec sheet

http://www.technobotsonline.com/model-motor-with-worm-drive-30510.html

I am trying to make the robot in the start here section.  The motors work when I hold the wires to batteries but when I try to attach them to the board they don't work.  I have followed the instructions carefully and soldered the wires to the pins (as I don't have connecters).  I have tried several times and am still stuck.  This robot is for a school project and has to be ready in two days.  I really don't know what to do can anyone help?

Thanks

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.

Hello, everybody......

i really need your guidance. i m making a robot which have to performs two task: line following + box placing..

it must be heavy in weight, because of its body and robotic arm (for picking a box, sense its color and then place it in a chamber of same color )

http://www.nerc.com.pk/images/floorplan2.jpg

my first task is to select motors .....i search motors a lot but cant find best....my robot weight lie in this range 10 kg- 14kg

CTC & I were shouting and the topic came to smart motor control.  Strangely, I have was working on a motor control software interface, and thought, what a great opportunity to ask, "What would you desire in motor control?"

My interface commands currently looks like this :

Hello, I'm new into the world of robotics, I don't have much experience with electronics and I'm waiting for my Arduino Duemilanove to arrive.  
Will it be OK if I connect this

To one I/O pin (set on output, HIGH) on Arduino and the GND pin, or will the atmega chip burn?

Have any of you experimented with windshield wiper motors? I know they've been used in budget robotwars fighters. I just need to get an idea what kind of strength they have (with the original gearbox).
Will it be able to pull 20 Kg vwith a 20 cm diameter wheel mounted directly to the output shaft? what abot 50 Kg? -or a 100?

I am looking to upgrade my first robot which is built from the LMR Starter Bundle. I to start out I would like to upgrade to 4 motors. Currently I only see the A & B pins for motor control. The motors do not need to be independently controled, I only need to be able to control 2 at a time. Is this doable?

Also, I eventually want to upgrade to bigger motors, would it be easier instead using 4 triacs or relays?

Thanks,

Well, yesterday i was cleaning the basement of one of my friend's house when i found this:

http://img37.imageshack.us/img37/4967/1002796s.jpg

A very good looking box with a lot of interesting stuff in! Motors, mechanics, gears, belts...and whatever people can drem up! Perfect for some cool robotic projects! So i brought everything in my house and i started testing it. I have no idea of where all this stuff came from, it seems a sort of photocophy machine, or something like that. All the guesses are welcomed!

 So I'm a complete beginner at this. I know ohm's law and generally what components do, but I've never tried to put anything together yet.

   Hello, is it possible to control regular small DC motors with an arduino board? If yes what limitations do I have?  can I use the PWM feature to increase decrease their speed?+

what about servos, do I need a motor driver or can I control them with just an arduino? 

   thanks!

It's been a while since I spent any serious time at LMR, or indeed building robots. A pressing need to totoally renovate a Victorian house has taken priority so that I can generate enough money top pay the mortgage interest when rates rise again !

I'm putting together an order at DAGU. But I need to be sure about one thing. The DC motors (items 12 and 13 in the LMR price list), are they GEARED motors? I presumed they were, but then I mailed Claudia and I asked: "Item 13 (dc motor) in the list: Are these motors WITH gears?" and got this answer: "The DC motor will not come with gears". However I think she may have misunderstood my question cause they do look like geared motors....

This is a collection of items to make up a complete Parallax Board of Education training kit. The Basic stamp is a new BS2P processor which is faster, more memory and comands then the original Basic Stamp2. It retails for $79.99. The board is in mint condition (only used a few times) and tested before listing. Everything else is new except the USB cable I used with my camera a few times. Parallax retail value of over $190, not counting the cable and un-opened bag of electronic parts that go with the book.

I was wondering whether RC toys are a good source for components. I came across a RC plane with two motors and two servos that only costs €25. This seems like a very good deal to me, or would this be a bad idea?

What are your experiences with demolishing toys for the greater good, or do you have an alternative cheap source of components?

My robot is going to compete in a competition that will require it to compete in different competitions.  For one competition, it has to be very efficient, and basically keep following a black line longer than everyone else.  Another competition that it has to compete in is a tug of war.  The rule is, it cannot change its hardware in between competitions.  Naturally, for the endurance competition, you want to hook up a smaller voltage to the motor.  But I was thinking of using the following circuit in order to give the motor more voltage for the tug of war competition:

I have a 2 wheeled robot - 2 GM10's with little thin wheels.  I've hooked them up to an arduino with an L293.  I have it going forwards, backwards & turning well enough.  The problem is when going forward, it seems to drift to the right slightly.  Any suggestions as to what the problem might be?  Do I need wider wheels?  A proper castor?  (ATM, the front of the chassis rests on the ground). 

Basically, what I'm asking is, with 2 small motors and thin wheels, can I expect a bot to go in a perfectly straight line?

Thanks!