Let's Make Robots!

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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.

LOGO :- UV Laser Style

Parallax Scribbler (S2) Robot - Ultra Violet Laser & XBee & LOGO (Part 2 of 5)

This is the second in a series of 5 Videos going from basic to advanced hacking of the S2 robot.

This second modification uses an UltraViolet Laser (the one I use can be focused for really thin line details)

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 ;)

Arduino pro mini undershield

The cheapest Arduino clone on Ebay is probably the small Arduino pro mini clone. I've bought some pro minis on Ebay for less then 3$ a piece from a Chinese seller. It's a tiny board with an ATmega328 running @ 5V. It does not have an USB/serial chip, so you need your own USB to serial converter.

Propeller S2 Ultra Violet 1 of 5

Parallax Scribbler (S2) Robot - Hacked with Ultra Violet

This is the 1st in a series of 5 Videos going from basic to advanced UltraViolet hacking of the S2 robot. ( This video also gives a short overview of what to expect in following videos )

This first version uses a simple UltraViolet Pen , the type used to detect forged bank notes. ( all my Swiss bank notes check out..... if you know what i mean ;-)

The UV pen simply fits into the pen slot of the S2 and i have used one of the already built-in programs to draw a figure "8"

Exciting new happenings at ServoCity in 2014!

We’re excited for 2014 because we have a lot planned!  Below we listed the Top 14 happenings we’re enthusiastic about in no particular order.

PID Tutorials for Line Following

Hey there guys. This post is outdated. Visit http://letsmakerobots.com/node/39972 for the updated tutorial.

Hello LMRians,

In this writeup, I will try to create a tutorial for tuning your robot using PID to follow a line. This tutorial won't go deep down into the details of PID and its applications but will just attempt to show how a robot can be tuned with the PID parameters to follow a line.

12V-30V Arduino Power Supply

So one project that I've been working on lately is a 24V Brushed Motor Controller Shield for Arduino. One of the features that the shield must implement is a power supply capable of power the Arduino with more than 15V, activates the Arduino when the input voltage is greater than 12V, and power any necessary gate driver circuitry. I finished Rev 1 of the power supply and plan to add one more revision to the power supply circuit before designing the reminding parts of the shield. 

Simple Camera Pan & Tilt

I wanted to create an unlimited 360° +/- pan with 180° tilt sync'd to my camera shutter (Prism)


So I got some scraps from the garage and made this thing - I know the quality is really lousy

I'm somewhat unsure if the fuel tubing couplers will be strong enough (bottom/pan coupler isn't connected yet)

Both mechanisms move "fairly freely" so . . . we shall see

 

It's a start - more later

:)

 

$500 ServoCity Scholarship - 2014 application now open

At ServoCity we care about helping students pursue their dreams - that’s why we’ve decided to offer this scholarship. We believe it’s important to encourage young minds to explore their potential and we hope this scholarship will aid a student in doing so. If you know of a high school senior who would qualify, please pass this information on.

The biggest moments in life..

Hi Guys,

I just figured I’d share this moment with you. The picture was taken just after my wife had been given birth to our second daughter a couple of days ago, December the 22. Guess I’m not much of a planner ;) But hey, at least it was not on Christmas eve!

Thank you for the greetings I have received by mail - as always, it’s amazing to feel your friendship :)

 

Bottoo or is that Bottwo ?

Well..  I'm just starting out on my second Robot.   I learned a lot about what to do, and more specifically what NOT to do while working on Robbie.

 

This new one will of course be based on the premise of Robbie, Raspberry Pi making the decisions, planning. mapping, etc.. with Arduino's doing the mundane work of running motors, reading encoders. 

Royal AP8000 8000mAh USB battery for $12 !!!

I just visited one of Costco's Clearance Outlet stores nearby, and found this LiPo battery pack for $12!  Just because it was out of it's packaging!

5v 2.1A out, wich charge level meter on front panel.  Weighs about 12oz...

Had to buy two of them  IMMEDIATELY before someone came to their senses!

It retails at Costco for $40, which is still a great price for LiPo  8000mAh here in Canada. 

Demo of a Conversational Robot that Learns by Listening...

I have been working on this for the past few months, basically, its a conversational learning AI.  I've tried to figure out how to explain it...best to watch the video.  The logic based stuff is a few minutes into the video.

At the core of it, the bot learns concepts by listening to people and remembering what they say...

28BYJ-48 Stepper pushes 2.8Kgs

As part of a 3D printed actuator , i have been sourcing parts for the drive motor...

Per-chance a 28BYJ-48 stepper motor shouted off the shelf .......

A few "Blender" iterations later ... a wormscrew and wormscrew nut were printed.

Hot off the press testing , just by holding the motor and nut secure ... i drove the stepper until it stopped.

As you see below it easily exerts a press force circa 2.3Kgs  .. the stepper locked itself at 2.8Kgs.

This force is being held on just two rows of thread - so good proof of PLA plastic stability.

Looking for ideas on a I2C Pan/tilt stand-alone sonar

This quest to build a stand-alone I2C pan/tilt range finder controller started with an article here by Ladvien.  In    http://letsmakerobots.com/node/39130, Ladvien explores using an ATtiny85 (84) as an I2C motor controller...

And in http://letsmakerobots.com/node/39222,   Chris the Carpenter   gives us an awesome pan and tilt code example... so...

Droid Planning

Firstly Thanks to Oddbot, Pome & the Dagu team for this amazing Robot.

Assembly time was about 16 hours, that included rebuilding the right wrist to get the servo in a position to be able to pour a liquid ;-)

SparkFun launches robotic parts & "Robotics 101" video series

Actobotics Logo - page

December 20, 2013: SparkFun launches the Actobotics robotic components online.

The first video shows Robert from SparkFun introducing the product line and talking about the various items.

"Do not average your Max-Sonar results..ever!" who knew?

I've apparently been mistreating my MaxSonar EZ-1.   I can't find where i stole.. er... borrowed my idea from for averaging a series of responses to reduce the inconsistencies, but I was looking up some information on the Arduino pulseIN() timeout (Thanks Oddbot!) and came across http://playground.arduino.cc/Main/MaxSonar   ... Yeah... I know it should have been one of my first places to look, but...

Sid, the clumsy housekeeper

You know I bought a Service Droid from Dagu, right? I wrote about assembling the kit here: http://letsmakerobots.com/node/39518

December 15, 2013.

Desk Robot; An attempt at planning.

 Yet to be named desk robot