Let's Make Robots!

Recently Collected Posts

2/11/10   - oops typo on the first post, its 3 IR's per side!!!     This is my Microrobot Robo-Lefter kit robot. Its a pretty good wall follower type maze … Read more

Navigation with (2) sonars Update 2 (with data)

*****Update 2.16.10*****

Got some data to start thinking about, guys. My thoughts of getting nice, even packs of 4 or 5 is a little out the window. To be honest, I tried to forget that I could see where the robot was facing and tried to make a decision where to go based on just the readings. I couldn't . Please note that I was seeing the readings on a LCD so left was above right not in a straight line. --Now that I think of it, I have no idea why I didn't line them up as it is a 16x2 display. Huh.

All readings were taken L to R

DIY bipedal robot, walking, upstairs, one leg balance, with remote control
Using a
This is my second robot. This bipedal is made with 12 low cost servos (MG995), 4 atmega168, aluminium material for window frames, and with small hand drills, hand … Read more
Mecanum wheels are hot, smart for robots, cool.. But impossible to get hold of, unless you want to spend USD 2-300. So why not just make your own?
Update: Here is how to make them really fast & stable.. but project will go no further, omni has arrived I got really pi**ed off by the fact that it was hard … Read more
This is meant as a platform where I can put a laptop and a webcam and then let the laptop control the NXT brick via usb or bluetooth from C++ code. The main purpose … Read more
it just goes forward or backward ;p
not all in one just one in one ;p in concept it had to be just one part of every thing, but i failed ;[ i wanted just one wheel, but i had to attach a couple at … Read more
Hi guys, this is my current project, i thought the programming would be easy, but since i havent used my arduino for months, it's not going so well, lol. Well … Read more

L293D question

I have build my own board with a PICAXE-18M and L293D motor driver.
The motor driver uses a seperate power source to power the motors.
When an output signal from the PIC is send to the L293D a LED shows the output is high.
All seems to work without problems; the motors do exactly what i tell them to do and so do the LEDs.

Allows you to input keyboard commands into your picaxe
Using a
So one thing that I have been wanting to do is connect a keyboard (PS/2) to the Picaxe. This is the first step to a whole slew of applications. Control Robots with … Read more
looks fancy and drives around
Using a
As being an engineer who had some ‘free’ time in his Christmas holiday the creation of the first arduino-b Read more
doesn't look fancy, it does drive around and can bump into obstacles
Using a
This was my fist prototype that ended up being the AdMoVeo robot. Read more
walk around the house
Using a
Update (sort of): Today the guys from the mechanical engineering department told me that they are movinginside the building, which means the plotter cant be used … Read more
This epoxy-encapsulated monocrystalline solar cell offers 6.7V and 31mA in a 37x33mm package. Now updated with the Miller Engine circuit! Read more
Walks forward and backward, turns in place, avoids obstacles.
Using a
This is a simple three-servo hexapod robot using the Pololu Micro Maestro as a controller.  The Micro Maestro allows allows me to sequence gaits and integrate … Read more
Dead reckoning, line following, maze solving
Using a
I'm building this fast robot for the upcomping LVbots mini-competition, which will include dead-reckoning and looped maze-solving contests.  I'm using: Read more
Just completed the Tamiya "Remote Control Robot Construction Set (Crawler Type)" kit, which you can find … Read more
Price: $0.75 USD

 Collected by 2 members
This single-pole, double-throw (SPDT) switch can be used as a general-purpose micro switch or tactile bump sensor for your robot. The switch body dimension is … Read more
Navigtes around the house using waypoints and ping corrections.
Using a
  I just started with robotics a few months ago, I started with the boe-bot and basic stamp2. A good learning platform, but I quickly found it's limitations. Read more
Detect the positon where maximum light exists, follows the light
Using a
Sun_searcher is a type of robot arm. That carries 2 solar panels each of 6 V and 100 mA. There are two geared dc motors as the actuators. I've used two LDRs to … Read more

Computer Parts Salvaging

My work occasionally has a surplus computer sale, where they get rid of old or non functioning computers.  So I picked up a nonfunctioning one complete with keyboard and mouse for free.computer_salvage_010.jpg

 This is also probably a good time to show you my basement workshop.


The whole setup takes up a corner in the basement next to the central vac.

how-to LMR meet-up

Inspired by the 2 years anniversary text on the LMR front page, I got to wondering

What do we require to make a successful LMR meet-up in real life?  

Yes I know we're spread all over the world, and anything higher than a 2% show-up rate would be a unbelievable. But what kind of physical preparations would one need? A large conference room with enough electrical outlets, loads of tables, PA-system and presentation equipment, and short distance to a bar and a cheap-ish hotel.

What else?

This project shows how to add text-to-speech to an Arduino project using a SpeakJet and a TTS256.
This how-to article describes an easy way to add unlimited text-to-speech to your Arduino projects (with a bit of modification to my source code below, the PicAxe, … Read more

Atmega + camera.

I have thought about atmega + camera idea too, but for use on atmega not sending. I looked at CMUcam but it wasn't so low-cost as it was advertised (100$ it too much). I found http://www.robotshop.us/sfe-cmos-camera-640-480.html . It seems cheap, microcontroller friendly and so on. Only problems are - SMD connections, killer programming and impossible debuging.


So, all thoughts and good links are welcome.

wheels and motors

Hi all I have been trying to gear my motors down which is a real pain so I was thinking of buying a Tamiya 70097 Twin-Motor Gearbox. Does anyone recommend this or a different type. I wanna keep costs down so something nice and cheap that has 2 geared independent motors. Also I didn’t think it would be that hard to find wheels.
This is a nice little hack I discovered that allows you to use LEDs on your Picaxe-28 robot without taking up any other pins.   Read more
command an actuator through wifi
Using a
This describes how to use the GPIO on a wireless router as binary outputs and how to control your electronics from the linux commandline. Software I started out … Read more
tells you how to adjust the picaxe programming editor to a picaxe 28x1
 in 7 easy steps!   this is made to help all the newbies who come to this site and jump into the "start here"project.    -and by doung that, hopefully makes … Read more