Let's Make Robots!


simulation of a hexapod in matlab, work in progress for more projects, visit http://retardokiddo.blogspot.com/ Read more
    Pictures in High res. now available on: https://picasaweb.google.com/117478617231202648212/Primo?authkey=Gv1sRgCLy4gIfUuZSIrwE The Code is on English now … Read more
Navigate around via ultrasound
Using a
I built this robot to test some different ideas that I had. One of them were the CD wheels and other was the free wheel tilted by a servo. It ended up to be a crazy … Read more

my servo not centered

i have buyed unbranded servo.. my servo is not in center.. if i set it to 150, it turns to one side...that is to 180degree. so i can't rotate it on both side.. can anyone help me to sotout this problem...!

Walks, dances, waves, rolls over, breaks
Using a
This is a 4 legged robot I built to entertain and to learn more about how to build robots. It uses eight cheap MG996R servos, two in each leg, controlled by a … Read more

Control Servos With PC.

Hello. I understand that this is a very broad question, and I have been looking into options but am confused as people tend to start getting quite technical with their answers rather quickly.

I am very very new to robotics, and would like to learn how to control servo motors via a PC, as in how to rotate the motor to different degrees around its axis. Ideally I am after a way that can control many servos at once.

Real-time enough? About PWMs and shaky servos

We are currently working on the next incarnation of our software and hardware platform for vehicles controlled over the Internet. Among others, we decide to investigate the way to control our robot without micro-controllers. In fact, BeagleBoard has a lot of GPIOs available. In addition, three hardware PWM generators and I2C bus should be enough at least to control the tank with camera, compass, GPS, and sonar.

example of Zoltberg's manufacturing manipulator completely out of polycaprolactone Read more

Energy reduction?


New code works well, but the motor moves slowly.


New power source plug in, code working = Nothing

Ok, time to order this one: http://www.robotshop.com/adafruit-motor-shield-kit-arduino-8.html

Walks around and avoid obstacles
Using a
So here's my first robot. It's based on Insect robot from MAKE : Arduino Bots and Gadgets. I've used Arduino Nano. For now I'm still improving walking of the robot. … Read more
Remote controlled, extremely precise (yeah, right!) 2-axis laser death ray
This started out as a top secret destruction weapon to be placed on the moon with plans of taking the world hostage, in order to make a trillion dollars... … Read more
Uses the servos potentiometer to detect resitance on a gripper.
Using a
I soldered a wire to the middle pin of the potentiometer inside the servo that operates my gripper. Using an analog pin, I can tell when the Servo isn't moving. I … Read more

Continuously Rotating Servos

I have a pair of servos that were modded to rotate continuously about a year ago. I've been trying to make them rotate with the command:

servo 0, 1 : servo 1, 1

but I find that this does nothing but make the servos twitch. However, when I use:

servo 0, 1 : servo 1, 1

wait 2

the servos rotate clockwise for two seconds. Furthermore, when I use:

servo 0, 2 : servo 1, 2

wait 2

Last Update: 3-Aug-2011 : Finished assembly. Updated board photos and added few more. Meet IBS-Wormy! This is a simple bot for my baby-daughter to play with. And I … Read more
     During my week of final exams I had almost nothing to do after my half-days of school, then I had a revelation, why don't I make a robotic arm. The fact of … Read more
Walk forword,back.left,right,balance one leg, up-down 1 or 2 leg,Turn right-left,camera
Using a
Upgrade 10/9/2001 Hello again I've made some additions to the Red-Dragon in order to make a humanoid robot. Read more
Uses 3,5mm jack to transfer signals on a rotating axis.
First thing first. This is just a quick and dirty attempt to improve the 360 degree sonar idea. I have seen some of the designs at LMR with a 3,5mm jack plug and … Read more

continuos rotation?

hello everyone im making a robot, and ive accidently bought my self non-continous servos. so i was on my way to convert them yo continous rotation and reading all the how-to's it says you need to use a servo controller to set the servo to the center position before beginning, but i do not have a servo controller. please tell me if i can just do this without setting it im just making a  small r/c or autonomous robot. if i need to can i just go ahead and skip that step do everything else and then wait for my arduino and motor shield to come in and then set it to center position?

How to read servo angles

I am thinking to build a robot arm or similar construction which can perform pre-recorded moves.

So, my question is if there is any way to read the servo angle/position and store it in a value (lets say in the EEPROM) and later just run the program to read these values to perform the same moves than before.

Walks around using 3 micro-servo's
Using a
Hi LMR people! I'm building a little hexapod, just for fun. It uses 3 tiny 3g servo's (from ebay). all the legs are constructed using the inside of terminal blocks. … Read more

SD 20 servo driver

Hi guys, Recently I posted a post on the forum about controlling a larger amount of servos (18). A few people suggested the SD20 servo driver chip which looked awesome so I went ahead and purchased a few of these chips. I have made the board and setup my picaxe 40x2 to send out the commands via i2c however I have ran into some problems that I just can't work out. All of the servos do seem to move to the given position but they seem to lack greatly in power. Second problem is that the servo movement range is greatly decreased.

Picaxe 40X2 servo control

Hey guys,


I have been working on a new project over the past couple of days and I have just come to the electronics stage of the project.  What I need is control of 18 servos.  For this I purchased a 40x2 chip as I saw how many I/O it had and seemed like the way to go.  Problem is that when I plugged in my Picaxe 40X2 and attempted to control a servo, The editor advsied me that only the "B" pins could be used with the servo commands.  This means that I can only control 8 servos with this chip?

This is Flippy, he was built to win the Cross the gap challenge but I couldn't complete him in time. He is the second (and third) implementation of my third design … Read more

Anyone knows the HS-35D Micro Servo Motor?

This servo motor looks very nice and it's very small, but it costs a LOT. I think it would fit just fine in applications such as helicopters or quadcopters. 

HS-35D Micro Servo Motorhere it is: http://www.robotshop.com/ca/hitec-hs-35d-micro-servo-motor.html

walk around and avoid obsticles with 8 servos and a sharp IR (impress friends!)
Using a
this is the very begining of my quadruped it uses a picaxe 28x1 and will sponser up to two servos per leg (2dof) so far the black box is just the "control station" … Read more
UPDATE 24.April 2011: New video! :) I implemented automatic resetting of the legs positions before changing from forward/backward walking to left/right walking. … Read more

Servo time/speed and position control (using an Arduino)

Is there a way to control servo position and speed at the same time? ex: you want to build a biped but you don't want the movements to be jerky.