Let's Make Robots!



This is the first part i made for my bot.

I Used an old RC car, or parts from it anyways.

I will use pressure sensors so it can "sense" how hard its holding things.I will also add another servo so it can spin it's hand.

Robotic arm mounted on an autonomous line follower

hello everyone.

I am working on a robotic arm mounted on an autonomous robot. I am done with the line following part. and It tracks the line pretty well. controlled 2 DC geared motors via fastPWM from atmega16 using motor driver l298, used LDRs and LM324 comparators for the line following. all the programming is done in avr studio 4 and used ponyprog to burn the code in atmega 16.


Pick up objects, knows it's position. Can remember and repeat.
Using a
Hello, I've found many great ideas on LMR and thought about posting a robot arm I worked on. This robot arm is controlled by an Arduino Mega based controller called … Read more

Number up to 180 from C# serial print mapped to servo movement

Okay, I'm thinking the title probably isn't very descriptive but it's late and it's the best I can do. Basically, I've written a program in C# (I shall unveil this on here in a few days) that ouputs a value between 0 and 180 based on certain conditions. I want to be able to take this value and print it over the serial and read it at the Arduino end as an integer, so i can just have myServo.write(int).

At the moment, in C# I'm using sp.Write(int.ToString()); but I can use the same command to write a byte array and a char array.

Arduino/ servo/ RC basics

I'll start off admitting that I'm a complete novice at robot building, so pardon me for what is probably stupid questions. I have bought an arduino with the intention of building a robot and have an idea of doing so mainly with servos, and I know that I can probably run them off the arduino without any problems helped by the arduino servo library, but can I just plug them in directly to the arduino or do I need a resistor in between or something? And question 2 How do I make my robot controllable via R/C? How do I put those circuits(?) together?

Hooking up a servo to picaxe 28x/40x project board.

   On my current project I am using the Picaxe 28x/40x project board and I don't know where to hook up servos on it.  I searched around on the internet a lot but couldn't find anything about where to hook them up.  Not even the board's manual said.  I don't know if I missed it or what but I can't believe that picaxe would just let you go find this out for yourself.  I even entered the code to center a servo and went around on the board and tried to find were it was.  I also remembered to put a 330 omh resistor on the signal line of the servo.  I

How to hook a actuator up to a servo.?

Im currently building a remote control snow plow, yes it sounds crazy, but very cool. Right now im trying to figure out a way to lift the plow up and down. I have an actuator from an electric wheelchair. my issue is how do i hook it up to the servo so it can be remote opperated! 

Thank you for your help!!

This is the improved version of the Edwardo V2.0 posted by Grimjack1973. We are working in colaboration and had to change the chasis design due to a few flaws. We … Read more
Hi, This is second version of my robot Primo. It is Lighter, Faster, Smaller and nicer (I think :D ). It is controlled by Picaxe-08M. I used one IR sensor connected … Read more

What happens if higher freq PWM is given as servo input

Has anyone tried giving a 5mS or 10mS (or lower freq - 40mS or 80mS) time period PWM signal to a hobby servo rated to work with a 20mS PWM siglan input...

What I am trying to ask.. Is there any way to give a higher (or lower like 25Hz) frequency PWM input signal to a servo...?

I dont have a servo with me right now or I would have tried it my self.. But Im guessing the servo jitters... If so why..?

Servo coding (solved)

It is working now, thanks to everyone who helped me out!!!



I am trying to make my servo work,but if I start my arduino, with code and servo attached, it just goes to one position and stays there twitching. Can someone help me?

second try

servo power

this hasn't happened but say if i pluged as many servos as i could in my board would they have enugh power ? would i need a second battery pack?, where would i atach it? and how would i stop it from destroying my microcontroller?



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
Controlled from PC via XBEE wirelees radio, or roams avoiding objects using sensors
Using a
Here is some information on Zapp Prop Bot-1.X It is controlled by a Propeller Robot Controller Board Kit V1.02 by Wulfden. 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 forward, backward, spins, blinks.
8/5/11 Update: Everyone should build one of these.  This was my first 'remove the PICAXE' of the dev board project.  Good fun! Read more
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