Let's Make Robots!

navigation

Autonomous navigation using vision
Using a
Well.... It may not be pretty... but it's fun to do... Trying to use the Raspberry Pi and its camera to navigate the room full of toddlers toys... The ultrasonic … Read more
Introduction: This is a project I've been thinking about for a long time. I built the hardware some time ago but never had time to put the beacons into use. The … Read more
Learns to navigate via Neural Network
Using a
This is the "Chinese Bot".  Its called that because 95% of the parts were sourced from China (via eBay). It uses Tamiya dual-motor gearbox, a cheap home-made … Read more

Autonomous navigation strategy: how to move forward from basic to advanced?

Last week my Rover 5 completed his first tour in our living room avoiding obstacles / no bumping ;-).

The Rover has the following sensors / inputs:

Navigate around via IR, avoids obstacles, communicates with the world with LEDs and Piezo speaker
Using a
And so it begins.... My first robot ever :) It is called MASHeR and is heavily based on Fritzl's excellent Start Here Robot tutorial. I decided from the beginning … Read more

Stereoscopic vision help

Hi, I am willing to built a stereoscopic navigation system (which will have 2 paralel webcams to capture images every X second and compare images with each other to find depth)  just for fun and coding challenge(more challenge actually) but i have no idea how to do that, i am searching and reading sources with all kind. however since i have no idea where to start more i read it makes me feel more confused and i cannot find a complete guide to follow.

IR navigation beacons

There have been several previous blogs and forums on LMR concerning different methods of robot navigation and room recognition. I have decided to make some IR beacons for experimenting with.

My theory is that if each room has at least 3 beacons spaced around it then the robot can not only triangulate it's position within the room but also determine what angle it is facing. Each beacon sends out a different identification code. This allows the robot to know which room it is in.

Hands free! navigation from a known GPS point given a distance and bearing
I am looking at building a relativly 'hands free' GPS navigator for bush walking as a backup for magnetic compass work. Keeping track of distance and bearing in … Read more

Thinking about entering Trinity College Fire-Fighting Contest

     The Trinity College Fire-Fighting Contest is the closest competition (to me) I know about, has anyone else considered entering?   In about a month registration opens and I was thinking of entering this year.  (definitely will enter next year)

There home page is:  http://www.trincoll.edu/events/robot/

And the rules are here : http://www.trincoll.edu/events/robot/Rules/default.asp

 


The things I need to figure out are:

dead reckoning algorithms / solutions

Hello All

Me again, flogging a (hopefully not) dead horse.

I wonder if anyone can provide links/guidance/code/insight into dead reckoning programming using the various (relatively) low cost components available to us.

I am thinking of things such as gyroscopes, accelerometers, magnometers etc. At this point I am excluding wheel encoders (since my vehicle is tracked and suffers from slipping tracks) or any form of external input such as beacons or gps etc.

What components for a navigation solution?

Hi All

It must be that my previous question http://letsmakerobots.com/node/28808 was wrongly phrased as I am sure there are plenty of knowledgable people here. Anyway, I will try re-phrase my question.

Could anyone be so kind as to tell me what components would make for a complete navigation module. ie. a module that knows where it is.

I am asking in terms of a small household or garden robot so GPS is probably not relevant.

Universal recharge, navigation and mapping system

WARNING! this blog is just my thoughts on the subject and may be prone to rambling, monologs and contradictions.

I want to develop a universal navigation system for my robots. By universal I mean that the same code should work on almost any robot with only minor modification to allow for I/O pins used and number / type of sensors. This code is being written for the Arduino but I will document the code well enough that it can be easily adapted for other processors.

 

Theory Stage:

Radio mast navigator - idea :)

Hi, just got this idea, and thought perhaps it would interest one of the clever guys out there. Hope is that a vendor will take this up, after a couple of clever LMRians have talked more about the details that I am too stupid to get into :)

 

Iphone controlled XMOS powered UGV robot!

Another XMOS robot I have found, made by people at University of Denver.

Demonstration of XMOS real-time ability. This test is running 8 independent tasks: gps task, ultra-sonic task, compass task, wifi receive task, wifi transmit task, pwm output task, behavior task, status led task:

http://www.youtube.com/watch?v=KUYIEC_V984

 

Control of a ground vehicle via XMOS microprocessor and iPhone through wifi:

    Based off the ever popular "How to build your first robot" by Fritsl, this is the most up to date version of my first robot, named Robet (Robe-et) Read more
    Is it possible to make a compass from something that was designed for something else and to do it inexpensively? We shall see!     Goal: To make a robot … Read more

My first project, lawnmower...

Hi,

 

Im new to this forum, and new to robotics in general. The same could be said abou my knowledge about microprocessors and programming language (other than .html notepad stuff).
 I have some basic knowledge about electronics, but nothing worth braging about.

But, i have been thinking about starting on a new project soon (I'm currently in the finishing stages of a little cnc project i have for cutting out rc airplane foamies...) which i would like to start this fall, and hopefully be done with before next summer.

Navigate using a reflective infrared sensor
Using a
I have made my first robot with my dad not long ago. My dad wrote the program as I'm not EXACTLY sure how to use the ADC, which I need to interpret the analog … Read more

RC RF directional beacon

I am still wondering if it is possible to create a simple, cheap, fairly accurate, directional beacon for outdoor use. And I keep thinking I should try to re-purpose an RC transmitter. So here it goes:

Would you deem it possible to create a directional antenna for an RC transmitter?

Would this antenna be able to rotate? Fully continous, or just 360 CW followed by 360 CCW?

Which RC system would you consider? There are so many frequencies in use. And modulation types.

Navigate around via IR
Using a
This is my first robot. The photo shows the way it looks for now, but it's a just 'prototype' yet and it will evolve ;) It has been inspired by fritsl's 'how to … Read more
(JKA is working on something more fancy than this, an applet for download)   If you are using Picaxe, I am sure you know, use, and appreciate the function … Read more