Let's Make Robots!


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:


I just bought some pretty cool wheels and motors for my future mobot!! I'm gonna make it some time next week. I hope I can do it.


ALS ICE bucket challenge for makers

As you all already know, the ALS ICE bucket challenge is flooding the internet with funny and not so funny videos of people getting a cold ice water shower for a good reason. We from DFRobot also did our part to get some videos more online.

We hijacked that challenge and extended it to all makers around the world. Makers who get challenged need to build a rig which somehow poures the water out of the bucket or something like that

Hello there.......Silicone!

Hello guys and hello there, Silicone.

THE (summed-up) ADVENTURE:

After searching a couple of shops in Kathmandu, I narrowed my search down to ones that dealt in paint, hardware, etc. like stuff. I also found a tube of silicone in one of them and that was exactly what I needed to mould a couple of tracks for Nano Rover in his new MB-3434 look.

Review - Veyron 24-Channel Servo Driver

Hi all, I've been a lurker here on LMR for a about a year but haven't posted anything besides a few comments/questions here and there. So, I suppose I should introduce myself! I'm a 35 year old Canadian tech support analyst. I've always been into computers but I only recently over the past year or so gotten into programming/robotics with the advent of the Raspberry Pi. Python is my main programming language, and I'm a noob at that.

Phase 9 - Web Control (Serial Preview/Wannabe Web Control)

The thought occurred to me to test out a basic sketch for the wireless control portion in phase 9. Even though I'm not there yet, I'll be waiting on parts for awhile and thought to try my hand at serial commands. I do a lot of "remote desktop"-ing for work and use a free program called TeamViewer to remotely control a computer when there is a problem. I'm not an IT expert, but I'm just dangerous in enough areas that I get called on to do things like that from time to time.

Phase 5 - Project Enclosure & Stock Chassis Issues

If you've not been following along, I have a photobucket album with a ton of pictures for this build.

Review: RobotKits.co.in 12V DC Motor with Gearbox

This is a short review of the RobotKits.co.in 12V DC Motor with Gearbox.

Review: RobotKits.co.in two channel Darlington transistor H-bridge

This is a short review of the RobotKits.co.in two channel Darlington transistor H-bridge.


Sir Viswesh was kind enough to send me info on a POV display he made. I am trying to make one, but this is my (gasp) first time arduinoing it up. So I have a 328P from a "Mintduino" kit. I had a circuit board started but decided last night to freeform the circuit instead. So far I only have a bunch of bits and pieces superglued together, but I like it already. I plan to add a copper wire arm assembly with the battery on the other side as a counter balance. Here are some current photos, I'll update here with progress.

Thanks Viswesh!

Crafting Materials! cheap materials to make robots

  • Rubber Bands
    The rubber bands are useful in any place you would use tape, but they are reusable!
    They are great also for adding grip on wheels for small robots.

  • Foam
    Foam in general is great because it absorbs mechanical shocks and humidity
    It's a great thermal, acustic insulant and it's easy to cut with a blade.
    Some foams can be glued together by heating them, but better to do it outdoor because it can make dangerous smoke.
    Sponge foams are flammable, but they carbonize when heated.

Phase 4.1 - route choices in obstacle avoidance

Nothing new to see externally on the robot, but you can check out all the build pictures over on my photobucket library.

General thoughts on the IP Camera Robot build so far

As I'm getting further along in this build and planning to implement features, I see the limitations on the Adafruit V1/SainSmart Motor Shield and the thought keeps occuring that I may need to do one or several of the following to squeeze more features onto this platform:

Super Cooler Code

Hi guys as some of you know I've been working on code for a project I have in mind, it not a new idea, lots of folks are doing it http://freeaire.com/ , I just want to put my take on it, and perhaps save some store owners some money and make a little myself.

 I live in Maine USA, winters are pretty cold here, lots of small stores have walk in coolers for keeping beer and soda code, so why not when its suitable use that cold air to cool the walk ins, a typical 8' by 20' walking cooler costs $250 or more a month in electricity to operate.

Some design stuff

time passes by quite quickly

Dealing with several circuits, which I found on this site and figuring out how to handle aluminium, I truely underestimated how complex building a functional robot is indeed.

My last post actually is decades old. I hope to present my robot in the near future and participate on LMR more frequently (I´ve been reading a lot here though). Working on a robot has shown me some kind of passion. The problem is to learn about circuits and living a life (work, private life etc.)

Buy Online Electronics Projects in India

Electronics Engineering

Electrical Engineering

Computer science engineering


By online electronics projects at ;


Phase 4 - Roaming with HC-SR04 on servo mount

For this portion of the project, I already knew that the ping sensor was working, so I started by soldering the HC-SR04 sensor to Analog 4 & 5 on the Motor Shield as seen here:

REVIEW:Arexx Yeti Chassis

This isn't the robot project yet, just the review of the kit that makes up the first part of it.

You can get the full version of this product with the Yeti microcontroller from Newark, but I wasn't interested in a full kit.  No, I just wanted it for its body:

Phase 3 Part 2 - Manual IR Control (Cancelled)

In-Depth photos and videos of this entire project are available on my photobucket library.

Here's how it looked with temporary IR mounting:


Sub $4 USD Arduino Nano on eBay.

I am always looking for cheap and small micro controllers. Since I moved from 8051 and HC11 based boards three or so years ago, I have been using the Atmel based Arduinos for the most part.

For the past two years, I have used mostly the Mini Pro's in most projects. I like them due to the small size and the fact they are less than $3 USD on eBay. I would love to use Nano more, but due to cost and issues I have not.  Now, I have ordered a few (5 or 6) Nanos from eBay, and have had mixed results with them in the past.

The problems have been:

Phase 3 Part 1 - IR Receiver/Remote Sketch

In-Depth photos and videos of this project are available on my photobucket library.

You can download the IRremote library by clicking here and following the instructions. 

Phase 2 - Install and test motor shield

For this phase of the project, I am using the SainSmart Motor Shield, which is a clone of the Adafruit Motor Shield (V1). It is very easy to set up and use and even has a URL printed on the PCB for the Adafruit Motor Shield Library Download. That link is an awesome resource on both this shield and the motor library, so the software install will not be documented here.

Phase 1 pt - Testing stock R/C unit

For posterity, there are a number of detailed photos (and links below them for full-size image) of the current (Aug 2014) board being shipped in the Maisto Tech Rock Crawler. Here is also a link to my photobucket album with even more images: My Photobucket Album

General Overview: Everything worked great out of the box. No issues, so I jumped straight into examining the board.