Let's Make Robots!

IR

Hi everybody! First of all, I want to thank all of you guys who's robot projects and blog entries make this site such an amazing place! You all ignited my passion … Read more
Avoid Obstacles, Search for charging station when battery is low.
Using a
This robot normally goes around avoiding obstacles and (sometimes) edges until its batter drops low. Then the robot goes towards a 38khz pulse instead of away from … Read more
Navigate around via sharp IR
Using a
I got the parts yesterday and i done building it already :) Read more

Sharp IR sensor Broken?

For some time now ive been trying to get m sharp ir sensor to work with my arduino.
its all plugged in and fine but no matter what is infront of it the data will keep bouncing around 1000.

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OPB704 Line Sensor

Intro:

I have received questions regarding the line sensor that I'm using on my mini sumo bot. Here I will post the schematic and pictures of the board. 

The OPB704:

navigare around via sharp ir sensor
Using a
this is a silly thing, had to make my own version of a clasic robot...... using meccano (erector) pieces, Arduino S3V3 single sided board, a pair of servos and a … Read more
Allows you to send IR / remote codes in "background"
Hello guys. After hours spent on the internet trying to understand how stuff works i came up with this piece of code. It simply sends out SONY remote codes, but the … Read more

Robot Slave Project is this feasible?

We are planning to make a Slave robot wherein a user will carry a transmitter and the robot with an embedded receiver will follow him around carrying his baggage(15-20kg).

An IR transmitter in the user side will broadcast and a receiver embedded in the robot will receive the broadcast in order to determine the location of the user.

A fixed distance of 1-1.5m should be maintained between the user and the machine. In order to prevent the machine from bumping the user.

Navigate around while avoiding obstacles with ultrasound, infrared light and air pressure based bumper sensors.
Using a
navigate and chat over IR
Using a
This is my first project that hasnt been a kit, and i wanted to do it from scratch. its not quite a sarm in the sense that ive only built one robot, and that it … Read more
Tells you what pipes to hit to play certain songs
Hi, this year I attended the 2010 National Scout Jamboree. My troop's gateway theme was The Blue Man Group, so we built PVC pipe instuments for people to play when … Read more

arduino and picaxe

hi i know it is possible to link a picaxe and arduino through i2c but was woundering and a picaxe remote sent signals to arduino robot for example control the motors and a pan and tilt mechanisum

mmany thanks rhys

Idea: Self adjusting IR detector

Hi all,

For some time I've been playing with IR sensors, trying to get some "eyes" for my little bot here:  http://letsmakerobots.com/node/19894

It is based on the IR Compond Eye design from Oddbot only smaller because I want to use two of them on the bot to get a very approximative distance measurement. 

Here is a version much alike Oddbot's but with only one phototransistor and 4 IR leds, and a 10K resistor instead of 4K7 to get a little better sensitivity from the transistor :

Patrols desktop environments, has a habit of shoving things off the edges...
Using a
This is Sebastian (A.K.A. "Sebbie"), a little palm-sized robot I built as a present for my partner since I figured it was about time I built something for her =) Read more

Good IR Bumpers?

Can anyone recommend any good IR transitters/ir detectors that can be ultilize for object detection. I tried using a phototransistor with an IR transmitter, but it only works when the IR transmitter and phototransistor are pointing directly at each other.

navigate around, make sounds, communicate with other 'bots, flash lights
Using a

Avoiding objects

Hello,

 

This is my first day here on LMR and I think it's a great site for learning new stuff for my robot.

Currently I'm working on my very first (own) robot.

What I have now is a cybot based platform (2 motors and a front wheel).

De motors are driven by a L298N driver.

That driver is connected to an Arduino board.

My next challenge is avoiding objects and I'm not quite sure what kind of sensors I would like to use.

First we have normal switches mounted on the front sides. (I rather not use this)

my very First bot - eYandron1

eyandron1

 

 


 

My very first encounter with electronics - a very simple manually controlled robot. The main brain controlling it is a Attiny2313 + a motor driver board based on TIP122 transistors. At the time when I built this, I had no idea about a chip called L293D!

Quick mock-up of IR obstacle avoider.

What is it?

This is a quick mockup used to test the IR obstacle detection circuit which came out of this forum topic:

http://letsmakerobots.com/node/17316

It uses this circuit:

brainlessbotAmended.png

Navigate arround using 2 IR Leds and an IR receptor
Using a
This is PJBot version 3. The brain of this Bug is an Arduino. Now, it only go rolling and  avoiding obstacles that it detects with 2 led's and 1 IR receptor. Read more
navigate around on its own using infrared and digital logic
Using a
this is my new "robot" fully designed by me , its name on-board comes from the way it was designed , its quite literally all on the single printed circuit board ! … Read more
Drives until obstacle detected, plus colour object tracking
Using a
I've spend too many years thinking about building my own robot and feel like I've found a group of like-minded folk with this site. :-)  I'd like to share my … Read more

Serial transmission and when to initialise it

Hello!

 I am trying to figure out how to transmit data from one atmega to another one via IR. Oh btw i am using arduino language.

First thing i though of was setting the serial communication by using serial.begin in the setup function. I tried that and i noticed that the LED connected to the TX pin on the arduino lights up as soon as i give power to the atmega. This is not really what i wanted, cause i'd like to have the LED off when not in use.

Robust Autonomous Robot Localization Using Interval Analysis

hi


i'm gonna do my project on autonomous robot.... and i got a ieee abstract.....

here goes....

Abstract :
Dagu now stocks this IR detector. It has an adjustable range from 3cm to 80cm and a dgital output with indicating LED. Although it can't be used to measure distance … Read more
This is the fusion of my old Qwerkbot project and a 4WD base, with omniwheels replacing the originals. I've also attached one of Oddbot's compound IR sensors for … Read more

Basic Triagulation Positioning System

3 Friends and I are building an autonomous tennis ball collecting robot for a 4th year design project for our undergrad.

We need a way for the robot to keep track of its position on the tennis court (in doors) and we are thinking of using 2 beacons to emit signals with a receiver on the robot. Has anybody done something like this before? Has anyone heard of pre-packaged solutions that do just this? A USB module would be ideal (we are using a netbook to control the robot), but we are not at all opposed to building the positioning system from scratch. 

Environment mapping

I'm currently working on an application for mapping the environment with a range sensor. Right now it's only a sharp sensor (GP2D12) mounted on a servo that is turning slowly, while the readings and corresponding servo angles are being sent constantly to my PC via serial. The program then converts the angle and distance to x/y coordinates and draws a map.

Roams around, avoids obstacles with ultrasound and ir
Using a
This is propably fourth or fitfh evolution version of my first finished and working robot ever built. It has Oopic-R controller as brains, 2 cont.rot. modified … Read more
Allows your robot to see and track nearby objects
The purpose of this cheap, easy to make eye is to allow your robot to track movement of nearby objects (within 200mm). After much experimentation and various … Read more