Let's Make Robots! | RobotShop


I just received my OSLRF laser Range Finder!

So I received this awesome package in the mail yesterday from LightWare Optoelectronics in South Africa.

Print PCB's on photoresist materials with a blue-ray pickup
Using a
  About a year ago my brother and I engaged on a quixotic project to build from scratch a low-cost PCB printer for photoresist.  Read more

The LM-317 Voltage regulator problem

Well, recently I have been attracted to laser diodes. I am trying to make them work. Here is what I learnt-

1. LASER diodes are pretty current hungry,it will eat as much as it gets,since it's internal resistance is pretty low.

2. To make LASER diodes work properly, you need a CONSTANT current source.

3.Red Laser diodes need 3 - 4 volt to run.

4.You can make a Laser driver using LM-317 (it's called DDL)

Identifying LASER diode pins

I have found a Sony AD-7280S DVD-RW drive,and the laser inside it is in working condition. I have taken it out,but surprisingly it has three pins. I want to know the pinouts of this specific diode. As reverse current for the Laser diodes is only 10uA max,I can't take the risk of trial and error method. The laser Diode has the three pins named as "D","G","C". I wonder what do these letters stand for.

IR Laser Sensing

Would one of these pickup a 38khz signal pulsed from a 650 nm laser?


Speach Synthesis, Speach recognition, face recognition and face tracking, autonomous navigation, remote controle
Using a
Hi Everybody! Few times ago I bought a Robot Vacuum cleaner (Neato) for my house. It wake up my old passion for robots which have been in sleep for years, after an … Read more
Plays Tic Tac Toe, Participates in Oddbot's Naughts and Crosses challenge
Using a
UPDATED 2/28/13 Before you read this, please read the post on my other Tic Tac Toe playing robot: The Ttp Project at: … Read more

Laser tag


I am planning on building a lasar tag set with my arduino. does anyone know what I could use to detect the lasar ( some sort of reciever or cell of some sort) I want to be able to use it when there is light so a photo cell is already out of the picture.


So I love lasers. Really, really love them. I've bought about a dozen different types of laser modules (green/red) to play with on my next bot. However I'm at a loss as to where to even begin on using them as more than just a "frickin laser beam", and have it actually DO SOMETHING!

3D Laser scanner for 25USD

Believe it or not, but in China the people really can do things with less money then elsewhere in the world. Cheap 3D Laser Scanner for roughly 25 bucks. See that amazing results...

Line Laser scans object while recording position of laser with software. Allows capture of 3D object into software.
Using a
Intended for use with David Laser Scanner software. After completing the CNC machine, I decided to build a scanner using my new machining ability. Using an Arduino … Read more
This is a simple Arduino Light seeker. It has an Arduino Duemilinove on board. It is powered by 2 AA batteries for logic( with boost converter), and 4 AA batteries … Read more

Detecting laser beams?

Using an Arduino, I guess I would modulate (PWM) the laser module and have the photocell light sensor pick up the frequency. Would this work?


Turns on and off whatever you connect to it
There are already some great projects on the internet about hacking home automation systems, but what I wanted to do was to control my plugs creatively. Thats why … Read more

IR v. Sonar

I've been making plan for an obstacle-avoiding robot, and was originally planning to use a Sharp IR range finder for it (10 - 80cm), but after seeing other sonar range finders, and other people's projects (the majority of the ones I see seem to use sonar), I was wondering:

Which is better: IR or sonar?

'Cos IR recievers can be affected by ambient IR light, and the best i;ve seen goes up to 150cm, whereas I;ve seen sonar ones up to 7.4m, roundabout, and they can't be affected by ambient sound (I think).

Bender is a medium sized robot based on the Crustcrawler Nomad HD platform. It uses the Parallax Motor Kit with Position Controllers, a pair of Parallax HB-25 Motor … Read more
Emits bright light and loud noises =D
Around the end of February every year there's a 'Chinese Lantern Festival' that happens in my city. Lots of junk to buy, cool lanterns, interesting food, and most … Read more

Shooting mosquitoes with lasers

Straight out from Shoutbox I just snatched this:

gimmelotsarobots: On the bright side, mosquitos are now being killed by self guiding lasers. http://intellectualventureslab.com/?page_id=563

Searhced around, and found this cool video of death!

Transport components out of robot cell
Using a
I'm working on a bachelor's project, together with 5 other students, where we're going to continue development of and improve a laser guided AGV. Read more

laser pointer and a 38khz sensor

would it be possible to make a laser flicker at 38khz?

I was thinking; if I had a modified laser that gave me a red dot that pulsed at 38Khz. If a robot was made to go towards a 38Khz beacon...

I thought this might function as a intuitive remote control.

The robot is programmed to do whatever, map its surrounding, search for metal or filming the girls gymn locker room. But when the laser is pointed anywhere in its vicinity it'll start following the red dot until the laser is switched of again. then it will continioue its original task.

Range scanner comparison?

Hello all,

I'm new to the forum, and fairly new to robotics.  I'm currently considering working on a research project involving multiple robots mapping an environment (something simple, like a wooden maze) together.  For the mapping I would need a fairly reliable range sensor.  I would very, very much appreciate some advice from seasoned robotics veterans such as many of you on this site!

Laser Tag and Recoil


It's me and my laser tag project again. This time you'll read about me trying to find a solution to simulate the recoil of real weapons to make laser tag more realistic and cool to play.

First part of the page will be, as usual, the brainstorming part. That means that i really do not know what i'm gonna use for the recoil mecahnism (and if i will be using one, if it gets too complicated or costly i'll just abandon this idea) so i ask you for suggestions.

 What does it have to do to properly simulate recoil?:

What distance sensors are better and best?

I am working on a much faster & stronger version of Robot Wall Racers, using quite fast RC-cars

I want to use lasers as distance sensors, but I think they will be a little over budget, altough this is a paid for job :)

Yes, SRF05's clai, they can detect a broomstick on 3 meters.. but in reality they are not stable before say 1.5 meters.

1.5 meters when you are traveling at 25km/h is NOT a lot, when you even are set up with drifting tyres.

can i still add a laser, speaker, led?

in my robot SC-QR-1 i have allready used all 8 servo-ports.

but can i still ad a laser(to see where it looks), a speaker(for it to call hor help or showing some sound-emotions..   etc.) and some leds(like a red to show power, white/bright to help my "primary-back-mounted-not-night-vision-spy-camera") 

and if yes would the servos disturb the lasers, speaker and leds?

and i was also thinking, stuff like the sharp ir sensors have ir leds in them, could i attach an led or laser to those pins??


please reply!! :D


So I have this laser tube lying around and I was wondering how to use it. It is a Helium-Neon (HE-NE) gas laser tube built by Uniphase.



horrible picture, just like most of mine


It's description is very vague, I'll read you the label.

(clears throat)






 S/N 183475


I've spent quite a bit of time on the mechanical design on this robot, maybe more then was strictly necessary since I used this opportunity to learn SolidWorks, and … Read more