Let's Make Robots!


1.27mm Headers in Eagle

Hi, I'm trying to make a breakout for a Wandboard. And I need to find an Eagle library that has 1.27mm pitch male headers. These are half the pitch of your typical 0.1" headers. 

Does anyone know of a good library that has these headers?


Python opencv

Hello everyone I have a problem regarding python and openCV. I want to make a rectangle in the middle of a video stream I was able to do it with a static image using the PIL library 


ATtiny servo control


After a brief discussion with fellow LMR member Maxhirez, about his Hedwig robot,
it seems as though there isn't much support for servos in the ATtiny family of
microcontrollers. After fighting with the 8-bit servo library I found HERE that was
supposed to make it as easy as a standard Arduino to add servos to an ATTiny project,

Need Help with conflicting Arduino libraries

Hello everyone,

I recently recieved some HC-SR04's and am wanting to make a little device to test them. The idea is that one sensor controls when a piezo buzzer will play, and the other sensor will decide the pitch of that note. I have written some code together but on trying to compile I get this error:




core.a(Tone.cpp.o): In function `__vector_7':

C:\Program Files (x86)\arduino-1.0.1\hardware\arduino\cores\arduino/Tone.cpp:523: multiple definition of `__vector_7'

Converting an STL file to Gcode to drive a CNC mill or lathe

As mentioned in my blog, "Multipurpose Mini Machine" DAGU wants to develop a low cost CNC machine kit. The models shown here will not be the final product, they are simply what I used for testing the quality of the components.

Part of the kit will be an Arduino compatible controller. Ok, I know, nothing new so far.

What do you think: do search engines do only good or do they limit, too?


I'm putting this before you because if you're reading this, chances are you're brilliant and well-qualified to add insight to my thinking about this matter.  For reasons that will become apparent shortly, I was going to request that only older LMR members contribute to this thread-but as CtC recently pointed out we have some very intelligent and able younger contributors, so it be behooves me to ask for everyone to mull this one over and put it out there.


Library Basics - Baseline


 With all the questions surrounding libraries in the Arduino IDE, I thought I'd start my next blog about creating a class used as a library for my Ping sensor.  As a start, I'll use the example sketch from the Arduino examples.  Below is the example code created by David Mellis and Tom Igoe with the majority of the comments removed:

Original (uncommented) Sketch

Struggling with creating libraries for Arduino


Documentation of my efforts will be continued in my blog: Building a new controller - fun and games

Thanks to the help of my fellow LMR members I now have a working library. I have attached the initial library created as a result of this forum. A big thanks to cr0c0, Maus and Mogule who put a lot of effort into helping me with my code. The attached library is not the final product, I need to add more functions and examples yet (I may also need more help).

A more powerful and versatile AVR library
Hey guys, I wanted to bring a video tutorial I created to the attention of LMR. The video is a walkthrough on how to use a software tool to setup a project using … Read more

Cool Arduino Library for driving servos!

I don't know if you guys already knew about these 2 very useful library to drive servo motors from the arduino, basicly you don't need to use analog write with an hexadecimal value to drvie the servo by PWM, you just write in degrees the angle and direction you wish the servo to go and it goes! 

Anyway here it is :