Let's Make Robots!


LMR in Google

I am replying to the message Frits posted on the start page.

I did a qick check about the google presence and there is no sign of disappearance. I am sure it just had a small hickup due the website changing (owner) and/or registration.

As we all want LMR to be the #1 I am also putting links whereever I see fit. Please do the same but do not spam other forums, just place the link where you think it's appropriate.


Dagu Robotic Arm 6DoF - Bacuri02 Project

I recently received my Dagu Robotic Arm 6 DOF with Arexx control board 32 servos.

My original project is to use an Arduino Mega to control the arm and then make a wifi connection joystick control.

As I have not received my Arduino Mega board, I started tinkering in Arexx control board that I received along with the robotic arm. Along with the kit also came with a CD ROM which I believed the program to be installed on the computer to control the arm.

Now that was FAAAST!

Hey there guys,

A week earlier, our fantastic LMR member Lumi was kind enough to sponsor me a gripper arm and a pan tilt bracket (for 3DOF). I was planning to use it in a project for a local exhibition. More on that soon! Let's see how the shipping went.

Mega blocks - DRC seeker working...

Well.... I set myself the task of creating a robot that would learn an object then go and find it using vision....

Mission accomplished.... well, its probably not very robust but that's a problem for another day...

Today's task was the Mega Block challenge -  an area bordered by Mega Blocks (it's what the kids use and have quite detailed images on them that I can use as objects to find):

Mega blocks - DRC seeker working...

Well.... I set myself the task of creating a robot that would learn an object then go and find it using vision....

Mission accomplished.... well, its probably not very robust but that's a problem for another day...

Today's task was the Mega Block challenge -  an area bordered by Mega Blocks (it's what the kids use and have quite detailed images on them that I can use as objects to find):

Short post on Successful data out of OSLRF-01 Laser Range Finder

It's late and I'm going to bed. My eyes are blurry, and I've got a headache... but!!!

I'm getting reliable (for the most part) Distance readings out of the OSLRF-01 as evidenced here in my putty dump.  The "ACTUAL" distance to target was in fact 2.67m.  I've got a fairly consistent reflection or ghost at 0.67 and few more stragglers that I will work to filter, but I'm quite pleased.

DRC: object recognition using Raspberry Pi

Well... now for some simple object recognition...

The program flow:

a) take an image; take a subsection as the reference object - calculate and store the SIFT descriptors for this image

SIFT descriptors

b) rotate DRC by 180 degrees.

c) take an image

d) calc SIFT descriptors and look for matches with the reference

e) if not many matches - rotate a little and go back to c)

Biped Howto: Stable locomotion

+++ UPDATE (12-march-2014): Rename title as "Biped Howto".


Biped Howto: Inverse kinematics

+++ UPDATE (12-march-2014): Rename title as "Biped Howto".

Prototype of OSLRF01 Arduino Scanning LIDAR (Under $150)

I've finally got pictures to show off the OSLRF-01 Open Source Laser Range Finder.  I've mounted it to a sturdy servo, and am running both currently with An Arduino FIO ... simply because that's the only available Arduino I have at the moment. 

I am also getting boards made up around the ATtiny84 that will sit as a daughterboard on this unit.   But the FIO prototype is to help me get functional code working NOW...

Biped Howto: Moving servos

+++ UPDATE (12-march-2014): Rename title as "Biped Howto".

Hi, I will try to explain, in a very simplistic manner, the way in which servo motors can be controlled.

Servo motors are controlled by a PWM signal, in which the active part of the signal (known as duty cycle) define the amount of degrees the servo will rotate.

AI.Frame funding

I've got in contact with the people behind the AI.Frame robots and there are some quite interesting designs. We've got some kits to try them. Now AI.Frame is going the next step and want to collect some funds for a first batch production.


You might recognize some stuff in the pictures. Yeah, my friend and me took that pictures in our DFRobot office.

Vader Vibes

Starting this blog as a place for me to throw down my thoughts about options for my Service Droid, VADER:


At times where I'm anxious to work on Vader but can't, atleast I can blog about it!  Right now is a good example: my 2 month old daughter is asleep in my arms. I may be having to type with one hand but the progress feels good!

First off, I'm considering a tweak to the acronym."Very Advanced" is a little over the top. Maybe "Virtually Advanced" or "Very Amateur".

I just received my OSLRF laser Range Finder!

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

InMoov tracking and voice control using MyRobotLab

Alessandruino's build in progress..

Made In Nepal Expo 2014 : A Glimpse

Hey there guys!

Whenver there's a relatively huge event in Nepal, the organizers resort to "Bhrikuti Mandap" as the venue. So was the case this time. The Made in Nepal Expo 2014 was held from 14th - 17th Feb 2014, at Bhrikuti Mandap. 

As the event name suggested, the event hosted hundreds of stalls that ranged from furniture to clothing and from pottery to 21st century art-work, in short, everything that's made in Nepal. Of course, why would I post this if there weren't some robots on display?

Pictures! Your Up Next!



Autonomous Navigation Robot

The process of monitoring and controlling the movement of a craft or a vehicle from one place to another is termed as Navigation. By employing and implementing a suitable design, we can create a vehicle that can navigate from one point to another without a driver. Autonomous Navigation Vehicle (AGV) is an automated vehicle that does not require operation from an operator.

HMC6352 Compass Module in Continuous Read Mode

I have a need (desire?) to use compass heading as part of my PID loop to keep my rover heading true.  Using my well established trial and error coding technique, I was unable to get a sufficient sample rate from the HMC6352 Compass module using code I pilfered.. er... borrowed (I plan to give it back!) from the Interwebs.

Pandora, the Makibox (by Kariloy)

Well, as many of you know I've been waiting for my own very 3D printer kit for quite a while (almost 16 months). But finally, this past Wednesday (Feb, 5th 2014) I finally got it. If you want to read more about it's arrival you can check it here.

And if you fancy really poor quality videos and you see the initial unboxing here.

Another Pro Mini breakout board.

When Bajdi wrote his blog, http://letsmakerobots.com/node/40026 , about his undershield for the Arduino Pro Mini clones I was very interested and excited. This was because over the last few months I have purchased a few (20) of these Pro Mini clones myself. I was elated to see that there might be an easy interface board for my future projects.

Hello there.........Hot Glue!

Hey there guys,

Finally, ( let me repeat that again ), FINALLY, I have made my entry to the LMR HOT GLUE CLUB !! (Really? Is there one? :D)

Long story. Many places were searched and explored in Kathmandu. Many shops and mini-markets, hunted down, and from one, out comes an LMRian's favourite weapon!

Below is where I found it. It's a place called Asan, a busy street market area. Pretty much an offline real world e-bay for me ! ( cheap stuff )


Gipsy, son of Sticky

As seen in my previous post, first attempt to build a quadrupod ended with a jump from the desk.
Hopefully, I learned a lot and I was ready to launch the next experiment.

My wife just received this very nice material from a friend and there’s enough for me too :)

I think the best english translation is paper foam board, but you will see it later.

Pulse oximeter Mk II

I just started to build a second version of a pulse oximeter. If you don't know what a pulse oximeter is, here is a simple but detailed description what a pulse oximeter is and how it works.

Space Balloons, Rovers, & Radio Controlled Airplanes!

Let's start a video blog

I think it's time to summarize my projects and start a video blog.

I already saw wonderful things from other members, this is a very small contribution.

first a quick intro on current projects. Then I hope to have more practical videos

Hope you'll enjoy a little bit

Sticky, born to disappear :)

As my 4WD slowly evolves, I wanted to think on my next platform.

One of the form that fascinate me is hexapod robots. They quite always looks organics in their moves and it seems that they can be easier to build than full crazy out of price humanoids ;)