Let's Make Robots!

Artificial Potential Field Approach and its Problems


Guys I need your help to get understanding artificial potential field approach and its problems , actually the main idea of the approach is clear to me and I don’t have any problem but the limitations of this approach and their solutions are not so clear to me , because I am not so good in math and actually I read many papers and sites which talking about that approach but all of them introduce the same concept , so I post here hoping to get some help from members here specially with who familiar with this types of approaches .


What Arduino kit should I purchase? [eBay]

Hey everyone! I've decided to purchase an Arduino Uno R3 kit from eBay. Culd you guys please recommend a kit that you know is good/may have purchased before? A few kits that I liked are:

-sainSmart Starter kit

Anybody else using or thinking about BeagleBone Black?

I'm looking to re-flash and install MachineKit. I'm also eying a Linuxcnc fork as a backup. Has anybody made this board as easy to grasp as an Arduino?

Robot Costume Contest

Hey guys!

If anyone is interested (and has mad costume-making skills), ezrobot is running a costume competition for Halloween! It can be any robot, it does not have to be an ezrobot. :) You can win some credit, and we would love to see some submissions from Let's Make Robots!  


occupancy grid map with canvas?

Im pretty new in this and my english sux, but i do my best :)

Im currently on it to build a Robot based on the Rover5 Chassis with ExplorerPCB and using a Arduino Mega2560 as Controller on ExplorerPCB..

How to make a medium size robot. Let's make a guide!

Now we have wonderful tutorials for making beginners and small robots, but bigger robot need stronger frame, motors, bigger batteries and can do much more work.

There are good examples of medium size robots here, but it would be useful to me and maybe others if there is a good comparison of various motors and drivers, how to get them and what to care about to avoid crashes and dangers.

Where could I buy a cheap BLDC motor position controller?

Hi! Can you please help me if you know any cheap web for buy a motor position controller? I am looking for a BLDC controller that does position control, like a servo motor.

Spider controller is not recognized in Arduino IDE

After initially successfully testing the Spider controller, I unplugged the spider and when i plugged it back in, my computer wouldn't recognize it anymore, in Arduino IDE the serial port shows nothing. Has anyone had this problem with the Spider before?
When I uploaded the initial code I might have selected 'mega 2560' as the board type instead of 'mega 1280'.

seeking inside chassis view of "articulated track drives"

Hi All,

I've googled my search engine to the max and have come up with only one inside view (linked below) of the mechanisms of a robot with articulated tracks.  What i mean by that is robots like these:

I've found many photos of ones that either move both the front or back tracks up/down in pairs, and others that can move each track up/down independently (while still driving).

Semi Functional Robot for a film

Hello! I am an amateur filmmaker, but have never dabbled in robot construction before. I was hoping to use a robot for my new film, and it doesn't have to do much, just basic mobile functions, like a toy car (move forward, basically). I was going to construct a body/ face out of non integrative parts (like the arms/ head doesn't have to move: I don't have enough skill to undertake that). I was thinking of purchasing a 2WD Beginner Robot Chassis V2 or something in that vein, a basic robot on wheels, and putting a body on it. Any suggestions??

dagu trex motor output voltage fold from 12v to 6,6V

help !

motor output voltage was 12v before testing with two motors(3 min testing).

no smoke, nor bad smelly, nothing melted.

and now ,just 6,6V maximum.

power in is good with 12V.

that situation dont change after 2 days of testing. battery or PC alimentation for input.

12V PC fans for output or  12V  wiper motors   , or nothing , always 6,6V at maximum speed


Can anyone ID this component --- "U5" markings AD=307

I been trying to Hack an Ableton midi controller..... and yes you guessed it ....."a whisp of internal Blue Smoke"

The part located as U5 ... markings AD=307   (the carbonised markings are clearly visible with magnifying glass)

Its is a 5 pin device.

its some kind of voltage regulator ... i think ... ie directly after the usb in connector....

Tutorial or equivalent for Compiling the OS for the Dagu T'rex controller

I have programmed extensively in the past but its really in the past.

Does anyone have a tutorial or crib sheet or list of todo's to build/compile the Arduino OS for the Dagu T'rex motor controller.

Nothing elaborate but enough to get started.




Dagu T'rex controller Windows USB utility

I am searching for a Windows utility to aid in tuning up variables etc. in the Dagu T'rex controller.

I thought there was one.  Does anyone know where?


Fall Wire Sale - 50% Off!

Don't miss our 50% off Wire Sale going on 

ICStation ATMEGA328 UNO V3.0 R3 Board $6.99, 2 Days Only

ICStation ATMEGA328 UNO V3.0 R3 Board without USB Cable $6.99
200pcs ONLY

Check the details here: http://www.icstation.com/newsletter/eMarketing/ICS_Board_5040.html

Mobile Robot couldn't pass smoothly and stack at any obstacle


Hi all 


this is my first post .

I am in the process of designing an obstacle avoidance mobile robot controlled by fuzzy logic , the idea of this work is that the robot should moves straight in an desired angle given by the user and if it faces an obstacle in his way , it should avoid that obstacle and then re-correct its heading angle to the desired angle . 

Another take on Jibo

Warning-contains drinking, several self-deprecating Asian jokes and scary references to NSA agents masturbating to underage girls.

(Link  to youtube if video embed doesn't work.)