Content in “IR”

Igor, My first robot

buhatkj — Tue, 15 Jul 2008 02:43:04 -0400

Primary image

What does it do?

navigate around with IR and avoid stuff

This is igor, my first robot. His brains are a Make controller, a SAM7-based microcontroller which I gotta say was NOT the cheapest but for the most part is a joy to program. The chassis is an octobot chassis from budget robotics, with an extra deck which is not attached in the photo..

Anyway, I just put him mostly together tonight, and wrote a real quick app to test the IR rangefinders. I'm not really sure what his mission in life should be yet, but for now I'm just gonna try to make him able to roam around and avoid stuff.

Cost to build

$250,00

Embedded video

Finished project

Number

Time to build

20 hours

Type

URL to more information

Weight

IR Versus Ultrasonic rangefinder on grass.

lordofthedonuts — Tue, 24 Jun 2008 01:03:59 -0400

Hi, I'm pretty much new to robotic, even though I've worked with kit like fischertechnik and Lego NXT.

I know the base of it, and i'm good with electronics.

but here it is i want to build plane that coud fly by itself using rangefinder (Ir or ultrasonic) to keep a distance from the ground, but i've read that IR sensor aren't good outside and that ultrasonic doesn't work good on absorbant material (Grass).

Since it's a plane I also have to consider weight in my choice.

Wich sensor would be the best for this task ?

One more First bot

shinewbie — Tue, 03 Jun 2008 21:58:31 -0400

Primary image

What does it do?

Navigate around objects via infrared

After far to much time spent gathering parts, I put together my bot. I skipped using a servo for the moment so it turns on its tracks to measure distance left and right. After the time spent putting it together, and coding it, it felt amazing to see it navigating the kitchen floor. I'll have a video up soon.

***UPDATE #1***

Built on a picaxe 28x1 micro controller and programmed in BASIC ( i think?!)

Tamiya dual gear box

Tamiya Track and Wheel set

A sharp infrared sensor as the range finder.

Cost to build

$100,00

Embedded video

Finished project

Number

Time to build

Type

tracks

URL to more information

Weight

New line sensor

jip — Sun, 30 Mar 2008 06:27:35 -0400

I had some problems with the 36 KHz detector when trying to read it from the picaxe, so I have switched to using 4 infrared photodiodes in a feedback setup with two LM358 dual opamp packages as shown in the following image (for one photodiode only):

This gives an analog reading and I will use this for linear interpolation between the sensors to determine where the line is relative to the robot center.

36 KHz modulated infrared light detector

jip — Sat, 08 Mar 2008 10:59:46 -0500

I have started working on a new robot that is mainly based on LEGO MINDSTORMS NXT. This robot is aimed at participating in DTU robocup 2008 but time will tell if it will be finished in time. Anyway in robocup the robot must at least be good at following a black line and preferably it should be able to accomplish other of the tasks at hand as well, and this is just not feasible using the standard LEGO sensors and the very limited number of these it can use at one time.

Is your IR on or off?

fritsl — Thu, 14 Feb 2008 11:09:50 -0500

Looking at an IR-transmitter, but have no clue weather it is on or off?

Turn on your camera, video or still, as long as it is digital.

This blue spot does not show for the human eye - but digitize it, and you can see :)

Sometimes you just get a little black piece of plastic, have nu clue, and nothing happens.. Camera!!! Blue spot!!!