Let's Make Robots!

Should Arduino based robot kits have the Arduino built in?

Now that I'm learning Arduino I've developed 3 Arduino robot kits. The first was fairly big and can take the Arduino Mega, Duemilanove or Nano. The second two have had the Arduino built directly onto the PCB so that little or no jumper wires are needed.

Which is better? The additional cost of the Arduino built in is less than buying an Arduino board and with all the basic wiring done it is much easier for those new to electronics.

Fast robot? (as in fast computing) how ?


So right now im planning for my first robot, I want my robot to be as fast as possible,  but I'm not talking speed wise(atleast not yet), rather 'computing'.

I'm thinking learn assembler ? I've understood its a painfull programming language to learn, but the programms are fast and powerfull. Offcource I could probaly solve my computational problems by just buying a faster ic, but those are difficult to get a holdof and not to mension expensive.

How do they work?

Well, yesterday i was cleaning the basement of one of my friend's house when i found this:


A very good looking box with a lot of interesting stuff in! Motors, mechanics, gears, belts...and whatever people can drem up! Perfect for some cool robotic projects! So i brought everything in my house and i started testing it. I have no idea of where all this stuff came from, it seems a sort of photocophy machine, or something like that. All the guesses are welcomed!

Future rocknroll

I stumble over this video every now and then, and I just cannot help loving the guy. A video that just gets better and better imho :D

Sharp GP2D12 and Object Detection

Hi all,


I'm trying to use 2 sharp sensors to detect an object which is placed near a wall (see pic). The problem with these sensors is that the readings will fluctuate even when it's static and if the distance is far, it is harder to differentiate the object from the wall.

the sensors are mounted on a moving robot. Any suggestions to detect the object?

When modifying the servos, Potentiometer question

Hello Everyone,

I have modified my servo and it rotates continuously ,however, no matter what values I plug into the servo between the numbers of 90 and 225 in always is spinning counter clockwise. When I try a value of say 75 -80 it simply doesn't turn and makes these little jerking movements but doesn't really turn. I am going to need my other servos to rotate the opposite direction since they will be on the other side of my robot so it goes forward. I thought that maybe this might be a potentiometer problem I am not sure. Anyone have any ideas?



Absolute Simplest Blob Detection on PC with WebCam

Hi There,

We need to know the absolute simplest way to do blob tracking using a windows pc. 

We are building a robot that seeks and collects tennis balls. Everything is working except for the ball recognition. All the PC software has to do is get the x,y coordinates of a yellow blob, and then send the appropriate signal to the COM port (we have 4 values that are sent to the comport to be interpreted by a pic micro and translated into "move forward" "move backward" "turn left" "turn right")



Anyone have experience (good or bad) with Tayda electronics? Please share.

I just googled this one part and Tayda came up as the absolute winner on price. Who would like to teach me how to order small quantities from suppliers far far away. Any caveats, consumer traps, unusual conditions, broken promises?


A different method of propulsion using gears

Servo is not going (updated with a picture), Picaxe 28x1


I programmed my picaxe using axepad for the mac.

servo 0,100  

But nothing happens,  the only movement I ever see is when I put in the batteries into the picaxe the connected servo moves slightly no matter which pin the servo is plugged into.  Is there something I am missing?  Is there something that tells a servo/picaxe to go or start?

Thank you,