Let's Make Robots!

Question - Disable (power off) module if they are not in use.

I want to design a robot with differents modules:
GPS, Soud detection, ping sensor, optical distance sensors, and more
To prevent battery discharge, I wonder if I could disable modules if they are not used.

To do that I think to use an I2C port extender driving some Mosfets

My source current comes from a 7805, so max 1A to share. No need big mosfet

So my questions are:

ComMotion Shield in action!

Some time ago I built my Scamper robot to test / demonstrate DAGU's new Omni wheels with rubber rollers. Later I remade Scamper into a kit and combined the two Mini Drivers into a single PCB called ComMotion.

Dagu Rover 5 questions on motion accuracy

I apologize if these questions are answered, but I promise I've looked on this site and others. Perhaps I'm just dumb....

What do you look for in 3D filament?

Name one thing that you value the most in 3D filament. And why?


New Micro Magician V2

The new improved Micro Magician V2 is here! It has all the features you loved in the original Micro Magician but with an ATmega328P and improved power supply. The new black and yellow PCB looks great and is easier to read.

You can now download the manual from here: https://docs.google.com/open?id=0B__O096vyVYqUjNXVV9RMmFuNkk


Automatic plant watering system with picaxe

I designing a automatic plant watering system

.A probe is placed in grow bag.It finds the resistance

If the resistance high ( >200 with 1 k conected ) then high 0 and a relay works

It works resistance up to 100 ohm then stops


LMR T-Shirt Fundraiser

The time has come! As promised I am now working on an LMR T-Shirt.

After my sucess printing my own shirts I am now familiar with the system and know how to get these printed cheap. I will be using the same system, TeeSpring, so remember that this is all crowdfunded and much like a 'kickstarter' campaign. All profits that will be raised are being donated to the masters of LMR to help them in their tremendous efforts to keep this site going and also to the upgrade process to LMR V4.

Help to buy a Mobile Robot

Hi all

I need help to guide me to buy a two wheel mobile robot with components (for example encoders , compass,others ) that make me know the robot position (i.e. X , Y , and Orientation ) precisely in global map . so which robot platform is good for that ?

Hint : I need this robot to implement Artificial Potential Field algorithm .


How to make a robot look steampunk?

Dear: LMR

Hello this is me Noah. You should know I am trying to build a steampunk robot chassis. This robot is going to be made of cardboard, arduino uno, and other materials. What I am trying to ask you is this how do you make something look steampunk, what materials do you use to make something look steampunk, and how to design a steampunk texture for my robot? I could use all the help I can get so thank you. By the way this is what I have done so far.

From: Noah