Let's Make Robots!

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Let's build a 3d printer!

 

The K8200 3D drag printer kit(aluminium bars under the table)


X-carriage mounted!

STL Viewer (beta)

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Laser range finder hack

Today I found  a PLR 15 laser range finder from Bosch for 45 Euro in a German DIY store. I bought and disassembled it to see if it could be used as a laser ranger finder in robotics. The main issue will be to debug the communication protocol. I hope it outputs distance measurements over serial directly like the UNI-T UT390B.

Arduino Code development on Linux

I have been a Linux user since 1991 and understand that things are not always as polished on Linux as on Windows. The Arduino IDE seems to fit this mode. The four cursor control keys, LEFT, RIGHT, UP, DOWN on the number pad do nothing while in the IDE editor. The HOME, END, PGUP, & PGDN keys function as expected. The arrow keys work in the serial terminal and menu functions. The keys work on the Windows version of the IDE (1.5.7).

The plus side is compilation speed. Not that is it "Slow" on Windows, it is about 5 time as fast on Linux (same machine).

HAPPY DASHAIN LMR!

Today marks the first day of the biggest festival in Nepal - Dashain. It also marks the first time I'm wishing a Happy Dashain to LMR!

Sunny - The InMoov clone at DFRobot

UPDATE OCTOBER 24, 2014:

The time lapse video made with 1200 photos captured by Sunny's camera eye (it's on Youku).

http://v.youku.com/v_show/id_XODA4OTcyNjc2.html

May I introduce Sunny. He's a direct offspring of the famous InMoov.

Mars Rovers and you

Recently, I posted blog comparing the computers used for the Apollo moon missions to an Arduino.  The Apollo Guidance Computer (AGC) was considerably less powerful than an Arduino.  Continuing along that line, I started investigating other computers used for space exploration.  Since the mars rovers are popular among robot builders, and often the source of inspiration and goals, I decided to take a look at those.  The results are rather interesting.

Sneak preview - Yet robot related

UPDATE SEP. 24:

Now it's robot related, as you can see on the following photos.

DISCLAIMER: No robot was harmed during that photo shooting!

Alexandra with the HCR.

And Alexandra as a brain surgeon trying to rescue the InMoov we just started to build.

At Startup Weekend, Everyone is a Winner

What do you do if you manage to get the approval of 4 out of around 60 people, to work on your idea for the next 54 hours? Sadly, you don't make the cut but then you look around, find someone passionate about their idea - someone who's willing to take a risk by picking YOU to be a part of their team - and start working on it.

Making a hand for the BRP

This started as most of my designs as a napkin drawing, then looking at the materials on-hand and then off to the milling machine. 3D printing would never work for me as I make and design rather than design and make.... I blame legos....

Extra Hardware Needed for Larger Hexapod

About a month ago I purchased hexapod kit off ebay.

Aluminium-Hexapod-Spider-Six-3DOF-Legs-Robot-Frame-Kit-for-Arduino

Yesterday as a break from program my Mini Hexapod, I started putting together this larger one.

ROBOT ARTIFICIAL INTELLIGENCE OPERATION SYSTEM

I am writing an OS for my future robots. So far the system is more or less a simple CAS (Computer Algebra System). The idea is that not only the user can use the CAS, but also the robot itself. It can solve linear and quadratic equations, includes linear regressions and a simple scientific calculator. The standard order of operations (1. exponents and roots, 2. multiplication and division, 3. addition and subtraction) is used. For the equation string parser I conceived a simple algorithm.The string will be simplified till only addition is left. Example:

Sunny - failed blog post

May I introduce Sunny. He's a direct offspring of the famous InMoov.

We started building Sunny (well, I am actually not doing much work but giving a helping hand and advises) her ein DFRobot for display at the Shanghai Maker Carnival in mid October.

Right now the head is almost done and we are planning to move down step by step.

The head contains a camera and a speaker to stream video from his left eye and talking via a Python script Espeak running on a Cubieboard.

The beauty and the beast - the magical conversion of a gun

I have not posted any robot in ages but I am still doing stuff :-)

For a project I have in mind I made and purchased some gadgets, also this Nerf gun

Unboxing the Robox

I did have time to unbox this, but I didn't have the time to actually use it or even to clear a spot for it. That's for Wednesday when I eventually wake up again. The Unboxing was easy and it all seems ready to work once I read the instructions and remove various pieces of packing tape and such.

My 3d Printer has Arrived!

Many months ago I found a 3d printer in Kickstarter that looked like a good combination of ability and cost. This was the Robox. And like most complicated Kickstarter campaigns they were late. So I waited and waited until this morning when I got the call!

Hopefully sometime this afternoon I will get my shiny new printer and be able to print robot parts. They should also be sending some filament, hopefully in the same box. Otherwise I won't be able to print anything until I get some. Maybe today I can place an order from Taulman for some nylon.

Use an Arduino to get to the Moon

So, this whole Maker movement has got you excited, and the rocket you are building in your backyard is nearing completion.  But you haven't decided on a navigation computer yet.  You were thinking of using a laptop, but your daughter needs it for school.  Maybe a Beaglebone Black.  Darn!  Seems they are sold out everywhere.  You look around your lab, but all you can find is an Arduino. At first you pass right over it.  But when you can't find anything else, you start to wonder, "Could it get me to the moon?"

Gee Thanks, Google...

I went to Google looking for an image of a particular kind of diagram to use as an example for the flow of a process I was working on today.  It took me a few minutes to figure out what was going on:

Not what I had in mind.

(this was NOT the kind of "State Table" I had in mind, but now I have to make one of Iowa to keep in my cubicle.)

Update :- Can someone ID this fish

Can someone ID this fish.....

 


 

Update 20140916 :-

STL Files posted vere here :-

What every robot builder needs to know about

It is probably safe to say that every member of LMR is interested in machines that interact with their environment.  Interacting with the environment means getting information from it to provide feedback to the machine.  In the  electronics and computer worlds, "information" means "signals."  And since most of our robots use digital signals, whether with discrete logic chips or some sort of computer, and our machines need to do some sort of processing on those signals, we all need to be familiar with Digital Signal Processing (DSP). One note before we go on.

bdkdev 0.1.0 for windows released

My NXP LPC1114 downloader app version 0.1.0a has finally been released.  Right now only the Windows installer is available. The same executable will run on Linux with the mono runtime installed.  The files from the install directory can be copied to a Linux machine after it is installed on Windows if you want to try that.

UPDATE:   The raw Linux files are also available at that same link.  They may also work on a Mac with mono installed, but I have no way of trying that.  If anyone tries it, I would be interested in the results.

ST Nucleo F411RE upgrade for Blizzard Bot

Aug 31, 2014

For ten dollars and change from Mouser, I can't resist. The 24MHz STM32Discovery board now in use is getting the boot to be replaced with a ST Nucleo F411RE.

An added bonus is the access to the mbed.org development environment.

Features

what is needed for an animated biped robot

For my project (http://letsmakerobots.com/blog/carloroosen/pet-work-progress) I need complex behavior and nice animation. My example is the NAO robot (http://www.aldebaran.com/en).

One of the things I am thinking of is mixing animation layers. Say you have one animation layer that does a basic biped walk. And another layer contains a balancing correction. And a third layer might contain head movement. Let's call them A, B and C.

Capturing Data from 7-Segment Display

Something I've wanted to do for a while is to be able to digitize the data from cheap sensors with a 7-segment display.

I decided to give it a try with some USB charge meters.

I purchased four of these meters.

I opened up one of the blue ones and probed the pins to see how the 7-segments were wired.

Pet (work in progress)

I have not built my first robot yet - waiting for the parts. But I have the plans for my second robot ready. He, just a little ambition :D.  My second project will be a prototype for a robot that can be sold as a consumer robot. I will call it Pet - working title.

This is how I imagine it. When you order Pet, it will come in a nicely designed box. In that box you will find a shiny sphere, a little smaller than a soccer ball. One size of the ball will be flat. You will also find a smaller box that contains a base plate with an electrical cable. No on/off switch. No manual.

Raspberry Pi Model B+ Review posted

Sorry guys, I forgot to mention it earlier!

As you probably know, the Raspberry Pi Foundation brought out the new Raspberry Pi Model B+ recently.

I got my hands on it mid-July, and after torture testing it wrote a rather large review.

Raspberry Pi Model A / B / B+ Review

MCUs a dying Breed (eg.Arduino...

Are MCUs a dying Breed (eg.Arduino......Propeller .... Picaxe)


How would you react if I were to predict that by the end of this year our favourite microprocessors would only exist as a Ghost in the works.......


Background :-

mBuino unboxing.

A couple of months ago, I saw the Kickstarter for the mBuino, an ARM Cortex M0 running at 50mhz and 3.3v.  It's about the size of an Arduino Nano, and cost 10$ USD. It is produced by GHI Electronics, and can be had from Outrageouscircuits

The board came packed in a padded mailer bag with a anti-static bag inside: