Let's Make Robots!

Stencil for Fun Light Switch Box

I just received a Fun Light Switch Box kit from Jameco.  The instructions call for a stencil to be found at http://letsmakerobots.com/files/userpics/u5293/Fun Light Switch Box Stencil.pdf. A request for that site yields a Requested Page Not Found window.  How can I find this stencil, which is essential for my putting this kit together?

full sized robot guidance

hey guys 

I just finished salvaging a power wheels kids three wbeeler

I plan on upsizing my avoidance robot

to this frame and do what needs to be done

with motors.

I have a question and I am confused

This toy has only one motor and a gearbox i supise

How do I go about using this or can I

I am wondering how this works

 

Switching to Arduino

I was a basic stamp2 guy, I planned on using the Propeller for my next big robot, but instead of learning spin, I might as well learn whatever arduino uses, besides Arduinos have ADC's which I need and are fully compatible with Pixy, which I already bought. Question, what's the best (or really good) arduino for Phydo: http://letsmakerobots.com/robot/project/phydo-0 (Large, at least 6 servos, plus dc motors, at least 8 adc, tons of I/O, voice, speech, vision, etc) I was thinking Mega 2560 R3, (but not if it's going to be obsolete next month which usually happens to me) Should

3D model of psuedoscorpion

I am looking for a 3D printable pasuedoscorpion for my son. Any help and or hints will be appreciated.

T'Rex Robot Controller Board Discontinued ???

 

Has the T'Rex Robot Controller board been discontinued?

I can't seem to find it in stock anywhere. All the sites I've checked has it listed as "Unavailable, Unknown Restock Date".

If so, why has it been discontinued?

And is there another board that is coming out to replace it?

CONGRADULATIONS Junkster!

Junkster mentioned in the shoutbox he has been admitted here,

http://www.iitb.ac.in/newacadhome/btech.jsp

and I just wanted to say Fantastic Work Junkster and I think a little Bragging is in order.

Find the Code Error! Take the Electrical Engineering Challenge to Win

Ready to participate in the Electrical Engineering Challenge (administered by Circuit Cellar magazine)? Circuit Cellar’s editors purposely inserted an error in the code 

Arduino Speech Code

Based on a talking-lift-buttons project published on instructables (credits to ICstation); I have modified the schematic to the following:

- Arduino Nano controls the audio storage chip APR9600 which includes 8 messages.

- Arduino generates random 8 numbers

- each number calls one of the 8 messages.

The result, it will look like as if the Arduino is talking out of its own mind.(more realistic if we extend this systems into say 50 phrases or more which may need a different audio storage module than APR9600)

Suggestion for a new "Add Content" tab:Your crappy kickstarter

Since we seem to get one or two of those a week submitted as a forum entry, why don't we just make it official?  "Here's the place where you can come to overinflate the originality of and grovel and beg for money to get your just-like-every-other-project funded."

Motee - the tiniest & smartest motor controller in the World

Hi,

I’m Karol Karczewski, the team leader of Lime Devices group. 
I’m happy to annouce that we have just launched our first campaign on Indiegogo:
The motor controller dedicated for robotics named Motee.

Dagu T'Rex Controller Magic Smoke

Hello!

I am new to the forums, but I was told this is likely the better place to ask my question. I recently was rewiring my Dagu T'Rex controller and mistakenly reversed the polarity on the battery connection to the board, as result I let out some of the magic smoke. It was in the low-voltage mode when this occurred, and I identified D17 as a failed open diode. I am not sure just yet if any other components have been affected, however any recommendations or help I can get would be appreciated.

 

-Ryan H.

Web Control of Robot (RPi / Arduino) - Software Recomendations

Hi;

I am enhancing my Arduino Nano based autonomous collision avoidance robot by adding a Raspberry Pi to stream video to a web page and provide manual control of the robot via buttons on the web page with the video stream.

So far I have installed Apache2 weberver and created a web page using Bootstrap with a button on it, I have successfuly connected the Arduino to the Pi via I2C and using a CGI Python script I can press a button on the web page to turn on an LED. 

NASA SpaceX Launch Invitation

Hello LMR,

As some of you might remember, we were recently awarded a small piece in the NASA SpaceApps Challenge.As a small gesture of giving something back to this amazing community, I'd like to invite a fellow LMRian(s) to  join me and a couple of my friends at the NASA SpaceX Launch at the Kennedy Space Center this September. It would be a pleasure meeting you in person.

Help me brainstorm up a new, perfect, Dog-chewing sensor.

This is my giant puppy Galileo (aka Leo):

aka "Vishnu, destroyer of leather furniture."

(These are only the last two examples.  There's one at the leather repair shop too.)

walking gaits.

I've been building the body of a poppy 3d printed robot to use as my biped Plat form but I'm having trouble grasping the equations for dynamic motion. Essentially I understand it to be a 2 in part; a double pendulum connected at a single point with control using a single inverted pendulum model, then switches over to the other leg and continues the set up. Granted I need to do a lot more programming tutorials to further my understanding but I know I'm going to need a ton of help. Would placing an accellerometer/gyroscope in each foot and one in the head make the system compute better.

Quadrature Decoders

There has been quite a lot of discussion regarding Quadrature Encoders and Arduino. I have typically used Microchip PIC24 with embedded hardware or added external circuity to off load the cpu. I do want to have example code for class.

Autonomous Solar Panel Spider Project (Arduino)

Hello fellow robot enthusiasts/experts,

My name is Michele (Michael) and I'm from Italy. I really appreciate all your efforts and creativity for the love of robotics! It's truly amazing to see all your projects.

diy shoulder axle/pin/shaft/dowel pin?

 

I would like to 

- create a shouldered pin* in order to glue gearwheels** to it 

- ask you for any advice or link that may hint me towards a solution

 

any ideas are highly appreciated:

Pololu A4988 and Nema 17

Hi, I'm trying to build a balancing robot. I bought 2 x A4988 driver and 2 x Nema 17 motor.