Let's Make Robots!

Can you identify this heat shrinked componented named LR?

Hi All,

In salvaging transistors to make H-Bridges, I cam across this receiver circuit board from a Maisto Rock Crawler.  It has two components that are shrink wrapped, and the PCB lists them as LR1 and LR2.  Wikipedia lists L, and I think LS, but there is no LR.  And I couldn't find anything similar by googling "heat shrink resistor," "heat shrink diode," and heat shrink component." 

mirco servo mount

 push fit servo mount " no screws needed" should be a snug fit. the bearing 

used on the mount is a 623Z of ebay.and should be a tight fit may have to work that part to make in fit tight. the bearing not there in the normal sense of a bearing  just to give a c brackets a smooth surface to turn on. so a piece of copper tube at the right diameter could be used.

 

STL Viewer (beta)

Model:
Rotate: |

robot face?

Hi guys

I've now got to the point where I want to add a face to my robot, having got it moving, and detecting obsticals.

So, I've been looking around, and all the small displays I've found work at 3.3V but my nano is a 5V one :( and I dont want to have to put in a level converter aswell.

So, I was wondering what people are using as displays for robot faces and debug messages?

 

Thanks

dan

parts for a Rostock mini

Looking for a home,

 a complete set of  parts  been printed at .22 layer height and a .35 infill solid enough. more details can be found at  ttp://www.thingiverse.com/thing:32850 

 

What devices use 10W or 20W resistors, to be used in ATX variable PSU project?

Hi All,

I was in the process of using a computer 12V power supply to power an Xbox kinect, but opted to just buy the $7 cable that goes into the wall instead.

Now I have a PSU that is perfect for making an adjustable (up to 12V) desktop power supply.  In looking online, it was suggested that using a 10W or 20W resistor as a part of the circuit is required.  Google searches have identified that some audio equipment might be a source of these resistors.

Arduino Code shaving

Dear LMRs,

This code below is by ICStation

http://www.instructables.com/id/APR9600-Voice-Recording-and-Playback-System-with-J/

They use a code works like this : when you press button 1 , Arduino instructs Audio record chip APR9600 to play first recorded msg whaich is (First floor) and so other buttons.

I know this is an ideal example of using matrix instead of line by line. but how ?

Multiple Machine Redundent AI (MMRAI)

I've been thinking about Artficial General Intelligence (AGI) and OpenCog. These things would be much easier to implement if we had a full research supercomputer. OpenCog has that and still hasn't produced a human level AGI.

Since we don't, I'm thinking of another way of doing things.

Martin is building an AI server on his home computer. This is great, but with the internet the way it is, I expect lag time will be too great at times. It's also a very linguisticly based solution to getting computers to speak.

Embedded wifi needs external antenna mod.

I have an mcu dev board with a embedded (usb)  wifi daughter board.  I am having a lot of trouble finding any info on it.  The markings on it are RL-UM12BTD RTL8188EUS-V1.2. 

Robot Voice Text To Speech

Hi, 

Can anyone point me in the direction of a good (free or very cheap) text to voice or voice changing software or app (android, ios or Mac) or even Windows. 

I need to make lots of recordings for a robotics project so I need a deep husky sound like the ABC Robot from Judge Dredd, or even the Guard Towers from Aspen Prison of the same film. 

The recordings will be played back to an ios Morfo app of a robot head to help give an animated face to my robot. 

 

Thanks 

Issue with IR Reciever Module Talking to Spider Controller

Probably a question for OddBot specifically, but maybe someone else could benefit someday from the answer.

This is part of my slow-rolling work on my Service Droid, VADER. 

Arduino Nano or Other board

Hi guys

New here, but i've been hanging around a while.

I've finally started working of my first robot, and I'm not sure if i should use my arduino nano or something else

 

I want my robot to be expandabe, and so far it has an LCD, 2 stepper motors (wheels) and a servo claw.

Because I want it to exspand as my knowlage grows, I think i'm going to want more IO pins than I've got... So I'm wondering wether to use my arduino, and I2C to a second chip, or to find myself a board with more IO's.

 

Any help/advice would be apreciated.

Arduino Nano or Other board

Hi guys

New here, but i've been hanging around a while.

I've finally started working of my first robot, and I'm not sure if i should use my arduino nano or something else

 

I want my robot to be expandabe, and so far it has an LCD, 2 stepper motors (wheels) and a servo claw.

Because I want it to exspand as my knowlage grows, I think i'm going to want more IO pins than I've got... So I'm wondering wether to use my arduino, and I2C to a second chip, or to find myself a board with more IO's.

 

Any help/advice would be apreciated.

Websocket implemenation @ Arduino or @ NodeJS + Firmata

There seems to be something wrong with my latest comments => repost them to be certain.

I need help in dead reckoning calculation

Hi all,

I need help to determine dead reckoning parameters ((x,y) coordinates and orientation) for my mobile robot, actually I found the code (written for Arduino)shown in the attachment and I don't know if it is good for this task , but in the code I faced some commands which are not clear to me :

I'm unclear as to which GNDs are supposed to be connected (picture of setup and robot included)

Hi All,

 

I'm trying to wire up a balancing robot but I'm not sure what to do with all of the grounds.

Understanding how not to break my new beginner kit!! (no fires please!)

Hi everyone,

First off, I want to say I am so excited I found this place... I'm almost bouncing off the walls waiting for my first beginner pack to come in. While I'm waiting, I'm trying to absorb everything I can. I think I've watched almost every youtube video that has been mentioned throughout this site, and a few folks that frequent here, I've lived on their youtube channels for days!!

Creation of a object vault

 LMR 3D printing  group  is growing and 2015 appears to be our  coming out to the world  and every week there appears to be some object repository site  like thingiverse , 3d hub and so on. So why can’t LMR take its place in the world with an object vault for all things robotics.  With the ability to upload stl. Files on LMR sharing ideas never been easier.

IR and ultrasound based positioning beacons

I have this idea for a positioning system based on IR+ultrasound beacons. It is very simple, and I'm surprised that I can't find anything like that already in use. I guess there are some problems that I can't see, so I wanted to ask you to point the flaws in my idea before I invest time and materials into chasing a pipe dream.

The goal is to get an accurate position of a robot inside a room that is decorated with some additional beacons. The positions of the beacons are known to the robot, so that it can position itself relative to them.

6WD Differential Turning issue

Hi,

 

I have just completed building 6WD by follwoing the tutorial here.

Specs:

1. 200rpm 12v DC motor Max stall current: 300milli amp and normal current :60milli amp and 2kg torque each.

2. 6X125mm Off road tyres

3. 12v battery with 4.5ah

4. L298N Motor Driver with Max 2amp output.

5. Aurdino Mega to control the drivers and aurdino UNO for transmitting wireless signels to Mega.

The issue:

what i notice is that the vehicle with PWM from 150 to 255 its able to move forward and reverse with out any issues.