motor

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. :(

Cheers everyone,

Dropping this link just incase anyone is interested.  For what its worth, I have no professional affiliation with MathWorks outside that of using the software as a student.

Quoted from site -- " In this webinar we feature the development and implementation of a field-oriented controller for a permanent magnet synchronous machine (PMSM) using a real-time microcontroller. The workflow will show you how to:

Hello everyone. My college has some project organised, to introduce mobile robotics to highschools in my country, and they asked me to design a robot which would be used for that. And it needs geared motors with encoders, and since the only thing I ever used was servos, I need help choosing them.

Hi I'm Ewan from Gimson Robotics (www.gimsonrobotics.co.uk), a UK based robot & electronics parts store recently relaunched after two years hiatus. We stock a range of motors and actuators for small to medium sized robotics/special effects applications. Please have a look at the site and see what you think.

Thanks for reading

So in another forum I explained how I was using power screwdriver motors to move my rocker bogie suspension system. So I was wondering if you guys had any ideas on how to dampen the acoustic noise(not the electrical noise) coming from these motors. They use planetary gearboxes which I know are notorious for being loud but I need the torque that they provide. I was planning on using some sound proofing material to dampen the sound but I was wondering if you had any ideas. I know it is kind of a weird topic but thanks for your help. 

So I bought a few power screwdrivers for the main drive motors for my new robot project. I have started creating a rocker bogie suspension system out of PVC pipe. This suspension will require 6 drive motors. The power screwdrivers run on 4 AA batteries. So the motors are 6 volt. By browsing the interwebs I figured out that one AA battery supplies about 2.4A. So I figured that each motor would require 9.6A. But since I have 6 motors I would need 57.6A. This would require a huge SLA which would weigh about 20lbs and cost around $100.

Hi everyone this is my first forums post here

I have a bit of a problem that i am trying to work out and that is how to control two motor with a picaxe school experimenter board and an -08m2 chip. This is for a very simple robot that should be able to go forward hit an object triggering a switch which will stop the robot, reverse it and then turn it around before moving off to crash into something else.

can anybody help me with any resources or circuit diagrams.

thanks very much

:)

I am working on making a remote controle tank using a  infrared transmiter and reciever  i can make it go forward and turn but i dont know how to make a hbridge so it can go backwards to. and im not sure what transistors to use or in what configeration.

A list of transistors and schematic would be greatly appreciated

thank you

I have been hard at work creating some new CAD models to share with the LMR team. 

This is the Solarbotics GM2 (or GM8 depending on the gear ratio) DC Gearmotor.  It is modeled in SolidWorks 2008 as a single part file, not an assembly, to reduce the file size.

I got my Picaxe kit in today and i was hooking everything up when i tried to get it to drive though, the motors were not working.

I put in High 5 and low 4 and high 7 and low 6 in my programmer but the wheels did not even move one inch HELP! :P

Hi guys 

I have a question 

I am going to connect it to a picaxe would it work.

As my username indicates I have many questions, I am very new to electronics, but I've done enough building/tinkering to feel comfortable attempting a fairly ambitions project... a very unconventional cuckoo clock. The first and most basic challenge I have is to have a motor turn 180 degrees very slowly, then back 180 at the same speed or faster. This would happen on the hour and involve additional actions such as door flaps opening and then closing, as well as sound to sync with the action. 

Myself and a local member of a hackerspace in Detroit recently started a new website devoted to robotics in Detroit. Right now the site is brand new, with really no content. So what I'm asking you to do is to sign up on the site, create a couple posts, etc just to generate some content. I'm not asking you to leave LMR, just check the site out (whats there anyways) and if you're proficient at drupal send me a PM, so you can help out the site too! Thanks.

Hello LMR,

I need to get two motors which I can control precisely, like in a CNC.

I've been looking for small stepper motors and found these, which Pololu sells:

http://www.pololu.com/catalog/product/1204

They seem to be good but I'm not sure about their speed (I've read somewhere that the are low speed and I would prefer fast motors).

I am currently designing some very budget friendly Motor drivers, and to test the design out, I am giving away 10 free drivers! Each driver is a single or possibly dual (5 single and 5 dual) transistor based design, and cost per board is very, very low. If you would like one of these free driver boards, please post in the forum below. No restrictions! Each board ships with a application note so you know how to use it.

A few specs:

Max Voltage: 30V

Max Amperage: 0.6A

HI there!

Fot this motor

http://www.nex-robotics.com/products/quadrotor/920kv-11-1v-brushless-dc-outrunner-motor.html

which battru should I use?

for batteries you can refer 

http://www.nex-robotics.com/products/batteries-and-chargers.html

Thanks

Hi everyone, I have a quick question regarding servos.

I think that LMR should have its own series of circuit boards, with the designs open source for all LMR'ians to use. Heres a couple ideas for PCB's:

ok this is a circuit i have come up with to try and not use a motor driver for my picaxe,

i will have the base transistors connected to pins of a picaxe 

i will appreciate your input 

Hi there, I have recently bought a RP5 chassis from pololu, this chassis is holding 2 brushed DC motors (6V) and I have some questions: first of all; how can I control it? I mean, do i need to control it by PWM or is just 5v or 0v?

second, I built a little pcb with a L293D to protect the controller (Arduino) from reverse current, is this ok? 

Hi, ive been trying to make a steppermotor driver for 2 http://www.active-robots.com/products/motorsandwheels/stepper-motors/datasheets/103h546-0440.pdf

I have used a ULN2003 like this:

(the second motor is in 5, 6, 7, 8 (I have a bigger ic)

I have been flumoxed by a motor issue recently, and was wondering if others had some strategy dealing with it successfully.