Let's Make Robots!


Free single day ticket for Maker Faire Bay Area May 16th - 17th

Well, it's about time to get this information out to you guys. We, DFRobot, will give away single day tickets for the Maker Faire this May in San Francisco.

What's the deal?

The deal is, you will get two single day tickets for Maker Faire and in return you will give us 3 hours of your time as a volunteer at our booth.

You will give us:

Let's share our robots with the world! Follow Let's Make Robots in Social Media!

Hi folks!

It's being a while sharing projects and experiments together, developing out skills on robotics also having fun!

To make our community grow some of us though to make more dinamic out social media interactions at TwitterFacebookGoogle+ Profile and Google+ Community, Flicker and Scrapbook


Lets Make Robots dasboard for Twitter


Some of you have Twitter or Facebook or even LinkedIn. So Let's Make Robots does!

We ask you to interact with Let's Make Robots account in the main social sites we are, so we can:

Marketplace at Let's Make Robots running well


Las week I purchased a propeller at the Let's Make Robots Marketplace and it works great. Here is the picture of what arrived, also a Pixter X Platform module board!


Purchased at Let's make robots Marketplace

Lazy Sunday afternoon...

I had ordered a few things from ServoCity and was mucking around with them today and made this:

My Soft Robotic Hand in Popular Science

I'm really excited to announce that one of my robotics projects is now in Popular Science magazine!

I met two editors from PopSci last year at NY Maker Faire, and exchanged contact info. Later one of them reached out to me to ask if I'd like to do a robotics project for the magazine, based on the resources in Harvard's Soft Robotics Toolkit.The toolkit is an excellent place to start if you are interested in soft robotics.


<Edited 19 Apr 2015 - Added Description/Comments>

I new bot chassis to play with. "Clamps"!

I After seeing the new Actobotics runt rovers and getting my hands on one, I find that I like them a lot for a quick inexpensive chassis.  Anyway, I have always loved boxy cars and was a Volvo owner for a long time. I had to have this one (Half Pint) since it's so, you know boxy! :)  Thinking of putting a gripper and a cam on it. Lot of room in the box!


Prom Night...Robot Style

Check out Anna rocking a dress...Artie is killing me with the bow tie.  Classic.   I'm just glad there are chaperones there...

Prom Night

I'm already doing well!

I just made my first real sale, that is one test sale and one real sale. Oh baby, this is going to be cool!


(Backend of the marketplace, my personal webshop)

ESP8266 wifi module issues I have had

The ESP8266 is very powerful little module, but a very picky one as well. In working with original ESP-01 I had very limited success with it and it just acted "flakey". I do understand now what most of the issues were with this module. 

NodeMCU ESP8266 simple httpd (web server) example

I want to add a simple webserver to my NodeMCU bot, and...

<begin old man grump>

ESP8266 running NodeMCU as a controller

Every since the ESP8266 modules were released, I have wanted to try one.  I ordered a few once they came out last year, but did not get to try them out until this year. After trying one module that seemed to work but never could be connected to, I tried another and was finally able to get one to work. The only test I actually did with it was to grab a webpage, basically a curl call. That was earlier in the year and had done nothing else since with them.


QSM - Quarter Square Multiplication, 8 x 8 -> 16 Speed Record on Extended Baseline PIC!

QSM - Quarter Square Multiplication, Speed Record on Extended Baseline PIC!

I'm a great fan of PIC10F / PIC12F / PIC16F controllers. They are inexpensive, they offer verstalie peripherals, and they are absoulely energy efficient which is becoming extremely important in the era of IoT. However, they don't provide mulitplication hardware. There are several code snippets for software multiplication around, but there is still the challenge of doing it better. I've taken it! And here we go with the fastest 8 x 8 -> 16 multiplication I know on extended baseline PIC.

4x4to8MTL - 4 x 4 -> 8 Multiplication by Table Lookup

The challenge

On piclist.com we find lots of basic arithmetic routines including multiplication of two 4 bit numbers giving an 8 bit result [1]. It gives detailed derivation of his code which is small and fast, indeed.

But we can do better! Since this article was published Microchip has brought the enhanced baseline PIC to market which has competitive price, larger instruction set, and more special function registers with increased functionality. This gives the option of simple and fast table lookup in program memory.

Arduino bluetooth controlled robot

Hello! This is the first robot about which I am writing on LMR. I am really excited! This robot uses an Arduino as its brain and has an HC-05 bluetooth module for sending in commands through a smartphone. The main focus here in this robot is the ability to automate its motions. A user can enter a string of letters and instruct the robot to mimic the step commands entered. For example a user can enter "ssrst" which means move forward 2 steps then turn right and move one step forward again.The 't' is to instruct the robot to perform the set of motions only once.

Mini review of the Actobotics runt rover Sprout robot chassis

Over the past week I have had the chance to play with the Actobotics runt rover Sprout. I posted an unboxing of this bot last week.


I would like to introduce myself to the community. My name is Dave, I work as a AUV / ASV tech as well as specializing in underwater acoustics. After general shop talk I have taken a interest in small scale robotics geared towards geographic and oil / gas research. I have worked with automation and autonomous vehicles for the last 10 years and would like to apply my knowledge to smaller units. I look forward to many good discussions here and am willing to help where I can. Best wishes, Dave








Find a sign by color tracking

An overview of the code factory:
Color detection is the fastest approach for for finding objects in a video image. And it does have its downsides of course.

Actobotics Runt Rover Sprout Unboxing

I was sent one of the new Runt Rover Sprout's from Actobotics today.  This is my unboxing report and first impressions.

New stuff arrived!

I have many new things today!

I received a box of old vaccum tubes won on eBay. These are meant to be used as decoration for Harpo (a reimagined R2D2 as if he were in Flash Gordon).

A bunch of surplus motors from All-Electronic (I believe).

And a nice assortment of Actobotics parts that I've agreed to review.

Pictures will follow sometime later tonight.

Ardux: low cost tracks robot based on cables chain

This article discusses a low-cost solution in the DIY style using a chain cable, acrylic cogwheel for the trasmission and plastic box. In this articles will illustrate the construction of a track of 15cm lengt

complete project here

A blast from the past! 1979

Cleaning up my "work" room today and found this little jewel from my teen years.  All the way back from 1979!


I've been cooped up in a hotel room while my wife is slowly getting over complications. Hopefully we leave Friday for home.

However, I did order a few things last night, including an Odroid-XU3 Lite. This is an 8 core ARM system with 2GB RAM. Think of it as a double strength RasPi 2 on steroids. I think it might be able to run some interesting AI software.

I'm hoping to run a version of OpenCog on it and compare this with the NUC.


My plans for building robots: The Troupe

My major plans for building robots is for the three main robots of the Troupe: Grouco, Harpo, and Chico. In addition there will be smaller prototypes: Bilbo, Frodo, and others. The Troupe will all be Retro-Futuristic.

The prototypes:

1. Bilbo is a balancing robot using OpenBeam beams, 3d printed levels and motor mounts, and a Teensy 3.1 to handle the balancing. My plans include trying to put the algorithm on an Arduino once I am satisfied with it.

2. Frodo is an iCreate 2 that will be used to prototype sensors.


Blue footed Bobbie!

Thanks to Oss, I have a Blue footed Bobbie now!

I have the servos on it and a Digispark soldered up.  I will make a uC/servo/ubec harness next week sometime. Will post pics back on my progress.  Thanks again Oss!