Let's Make Robots!

Designing the chassis

Hi ! 

Im trying to make my first robot chassis. I ran into some problems: Where to make the holes for the tires and such. My concern is the things wont align up so the wheels wont be straight. I saw some of you guys having these super cool design plans where everything is straight and good to go. How do you make these? What programs do you use? 



T'REX robot controller


The T'REX robot controller makes controlling robots easy!

The Arduino compatible controller comes pre-programmed with sample code that lets you control it with a supplied Android app, Radio Control or with an external controller via I²C.


T'REX Controller on Wild thumper 6WD

Hi, I just put the new T'rex controller on my Wild thumper 6wd, and i put the bluetooth module to controlled by my smart phone, but the problem is , it's running very slow, and lack of power.......

how to connect lipo battery 7.4v to arduino pro micro

Hi i have problem then i connect lipo batery throught the draiver its ok but motors runs fast if i connect battery directly to the arduino raw and gnd and and then from arduino vcc to motor draiver its not working why ? 

Raw pin 5-15v

Motor draiver

from draiver to arduino then i connect like this its runs 

senond one.

Robot Self Defense

Robots or biomorphs (robots modeled after living creatures) are commonly fragile especially as you move to a smaller scale.

how to get arm middle-segment to rotate 360, while rest of arm stays still?

Hey everyone,

I saw a video a while back of a motoman robot cycling through some movements.  One of the things it did was stick its arms out straight, and then begun to 360 degree rotate a middle section of its arm, while the adjacent sections stayed put.  How did it accomplish this without twisting the wires inside?  Heres a pic to help describe what i'm talking about:

Arduino Mega 2560 R3 Qusetion

Hi All, I am currently using Arduino Mega 2560 R3, with the Rover5 explorer board, I have load to code but the unit is not working properly, My question is, Do I need to prepair the Mega R3 in some way, before I load the program, or when you load up a new code, does it write over the old cde.




Rover 5 Power up http://youtu.be/NP9d5ouBVTE

KiCad problems on windows 8


Don't know if this is the best place to ask about this sort of stuff, but here it is:

cordless drill electric brake + stepper motor = saving power while not moving?

Hi All,

I've been trying to find out how the electric brake in cordless drills work, but am having no luck.  The appear to be able to stop the drill motor instantly with no wind-down.  

If anyone knows how this system works, can you provide a brief description or point me in the direction of where to go and learn about it?

What I had in mind was applying this type of braking system to a stepper motor of a balancing robot, so that I could save power, during those moments when the balancing robot is balanced and the motor is not moving.  

Free trial 24 channel Veyron Servo Controller

It's time again, go and grab your free 24 channel Veyron Servo Controller. All you have to do is write a comment there or shoot the DFRobot guys an email. We would really like to see a review after you tested the controller.