Let's Make Robots!


Need ideas on a robot arm.

I am looking to make a robot arm that is controlled via radio. 

The arm needs to be able to pick up wooden pieces that can range from 0.5lbs to 10lbs and carry them a fair distance. I already have a moving robot, but I am just stuck on what to do to pick up the pieces. 

I have parts readily available to me as long as if I don't have to buy a whole arm that's already pre made.

I have servos, arduinos, circuits, aluminium sheets - bars - rods - etc.

Best microcontroller for me to use?

Hey guys, Cycloned here. I am just hoping to start with Robotics. I know nothing, I have an NXT kit and have done some work with that, but nothing at a higher level, and now that Im in engineering I understand I've got to stop using such kits and actually start building robots from parts. I would like to know what microcontroller that I should use. There are some events in my college (robo wars, robo soccer, sumo wars, and an obstacle course) that I wish to participate, so I was wondering what would be well suited for such competitons.

Best microcontroller for me to use?

Hey guys, Cycloned here. I am just hoping to start with Robotics. I know nothing, I have an NXT kit and have done some work with that, but nothing at a higher level, and now that Im in engineering I understand I've got to stop using such kits and actually start building robots from parts. I would like to know what microcontroller that I should use. There are some events in my college (robo wars, robo soccer, sumo wars, and an obstacle course) that I wish to participate, so I was wondering what would be well suited for such competitons.

Troubleshooting 3-d Printer

This blog is a place to collect notes to be worked up into a Tips post for trubleshooting 3-d Printer problyms.

The idea is to list a symptom with a photograph and list sucsful fix actions to try.



For Example:

Printer: Printerbot LC

Material: ABS

Notes: Extruder temp 230C, Bed temp 110C, Fan on 100%,Polymide (Kapton) on a glass bed 

Problym: Poorly formed vertical edges, Keystoning (wider at the top then the bottom)

Help requested with programming "Official Arduino Robot".

I need some help programming a servo routine for the new "Official Arduino Robot".

So far, NONE of the standard Arduino servo routines function with this robot. "#include <Servo.h>" is the most common servo control routine and I get an "Error 17" whenever I attempt to use it.

More recent "standard" servo routines refuse to function as well.

It was a big shock that the robot included no servo control in its list of functions. "Forget something, Arduino???" :-)

Any help would be GREATLY appreciated!

First robot idea

I'm new to this website, but have been researching robots for a while, and my ultimate aim is to have a cube shaped robot on 4 wheels which can walk around on its own, and can follow you, with a talking ability if that's possible, any help would be appreciated. Thanks, smiggle

Raspberry Pi Lego car

Hello all,

I'm making my first robot using Raspberry Pi. My robot looks like a car with three wheels. Two of them are in front and have connection to motors, The third one is behind and it's no connection to motors.

I'm planning to use 2 simple motors (for each front wheel one). For now my robot weight 260g, and i have to add two motors and battery and i little of more constuction for holding motors and battery. I'm already found which type of motor should i use:

Motraxx MOTOR X-FLY 400 or Moteaxx MOTOR X-FLY 280.

What robots did you start out using?

Hi everybody! I'm a new-found robot enthusiast and I was interested in which robots all of you hobbyists started out messing with. Any answers would be great I'm really excited to get started!Thank you! :) 

Augmenting a microcontroller?

I need help augmenting a microcontroller. I have a bit of a problem. If I may digress, I first bought and assembled fritsl's Start Here 2.0 robot. I even programmed it using some of the sample code and some of my own (limited) BASIC knowledge. Soon enough I had a little robot running around the floor. I even named him Pal and put some LED's in the two mounting screw holes on the distance sensor. After my initial success, I went to the internet to learn more and hit a dead end.

Receiver to KK Board

GOOD DAY ! everybody ! 

I am here ASKING FOR HELP ! 

I am making a Tri/T-Copter UAV, and I'm having a HARD time with my KK BOARD ...

Can anybody PLEASE Help me How to Connect the 3 ESC and Receiver to the KK Board with 3 DC Motor...?

You may:

Demonstrate it 

Give a HELPFUL / USEFUL Links / Videos

I need YOUR ideas!! Please!

Helloooo all!!!

I wasn't sure where I should post this, but this seemed an ok place......


Cant find a tutorial !

Hi everyone,

Recently I came across some very good hexapods designed with 6,8 and even 12 servos.I have a duemilanove and would like to build one.

But unfortunately I have not ventured into this domain and my search for a step by step tutorial on google(on multilegged critters like hexapod) and instructables proved futile.Any Links that can help me get started or rather a complete tutorial link would be awesome.Thanks!

Burnt Project Board / Need help

I recently attempted a go at the "Start Here" and ran into some problems pretty fast, 

as beginners, my freind and I burnt the 4 holes on the board that control the 2 motors, and when i say burnt i mean that the pins dont even solder properly anymore, ontop of that even if u can get it soldered too the board by using alot of solder, the pins just don't work, they have no connection. We know this because we continued on to the build and got to the programming, and the servo works, the distance sensor works, just the wheels dont work.


Hello everybody, I'm Acer. I'm one of Aaronsuper1's schoolmate. I'm a bit new to robotics. So I need help. I'm making a free form arduino. I'm waiting for aaron to bootload an atmega328 for me. Gonna buy parts tomorrow. Any tips?

Picaxe 28X1 power?

I am a newbby here and with the robots and i need your help. My motors which is connect on the board are 5v each but on the output pins it have only 2v .So i need your help with these how i can connect more power.  Please if you can send me a picture.

RF Link Help

I have been expiramenting with some RF links (tutorial here, RF link). The tutorial is great, but it only does serial communications. 

The code I use is 


// transmitter.pde


// Simple example of how to use VirtualWire to transmit messages

// Implements a simplex (one-way) transmitter with an TX-C1 module


// See VirtualWire.h for detailed API docs

// Author: Mike McCauley (mikem@open.com.au)

// Copyright (C) 2008 Mike McCauley

what is the best way to communicate wirelessly from one arduino to another

I have 2 arduino megas and would like to send the potentiometer values of one arduino to control servos conected to the other arduino and I have never used any wireless things with arduino before I have a 433mhz transmitter and a reciever but havent been able to find any useful code for it and was wondering what other wireless devices i could use for sending potentiometer values wirelessly to another arduino easily . Any sugestions and example code and where to buy it would be greatly apreciated thank you

Building a line following robot Need help with programming


#define INA_2   10   //This is the left forward control of the robot, I defined each pwm pin that is connected to the arduino

#define INB_2   11   //This is the left backward control of the motor, e.g set this high and INB_1 high and others low you will do a reverse

#define INA_1  5    //This is the right forward control of the motor

#define INB_1  6   //This is the right backward control of the motor





How do you use a L293D Motor Controller with an Arduino MEGA?

I have recently received my order from ebay. A L293D Motor Controller for my first robot. I read the datasheet and other guides but i can't figure out how to use it, please help! I didnt order 2 so i only have 1, if it fries, i cant get another one or i have to make one. :(


Where do I connect it?

I have an old droid eris and a RAD 2.0, I want to somehow conenct the droid to the motherboard of the RAD by soldering the end of it's usb connection cable but I am not sure where to do this. I have searched the web for a schematic but have been unable to find one. Any advice or resources are welcome. 



So i have a IR detector and it is hooked up to an arduino i have programed it with the help of this blog http://www.arcfn.com/2009/08/multi-protocol-infrared-remote-library.html i am doing the example that is named " How to recieve" 

Problem: whenever i click a button on my remote the number 0 apeers on the serial monitor. What does that mean?

My first hand written code.

I have just written my first code in Arduino IDE. The code should make a servo move to 180 degrees wait one second and then move back to 0 degrees and repeat.

Here it is :


#include <Servo.h>


Servo servo1;

int posR = 179;

int posL = 0;


void setup()





void loop()







Servos energy (Robotic Arm)


Well, now that I have time for this robot I've discovered that the SSC32 supports at maximum 9 volts and my PSU is 12 volts. The website for robotshop says 6v to 12 volts but the documentation says 7.2v. Help me please



Hi, I'm working on a robotic arm, but I don't know what power source purchase. My servos are the problem:


Myself and a local member of a hackerspace in Detroit recently started a new website devoted to robotics in Detroit. Right now the site is brand new, with really no content. So what I'm asking you to do is to sign up on the site, create a couple posts, etc just to generate some content. I'm not asking you to leave LMR, just check the site out (whats there anyways) and if you're proficient at drupal send me a PM, so you can help out the site too! Thanks.

Energy outlets for this motor driver


New battery = No results.

What's wrong?. Arduino energy from USB, Shield energy from 7.2v and code that works on other robot. Tested with another motor just in case and zero, nothing, blank, null, etc.

Uber cheap build idea, needing input...

I'm looking to build an uber-cheap robot arm, with the purpose of just sitting on my desk and picking up whatever i want it to... Probably stick with a basic control (independent forward, off, reverse switches on each motor) setup. What i'm trying to figure out is, I'm planning on using a standard 3 wire (forward, ground, reverse) style motor similar to that found in a cheap rc car, yet i can't find any places to buy them, except in the cars. any sugestions?

My Arduino 2560 Power on, Won't upload

I just bought an Arduino 2560 Board, I was using it with windows 7 and it was working perfectly.

The problem is that now the Arduino is not detected by any of the operative systems, I am currently testing with Mac Snow Leopard, Linux and windows 7. The reset botton is working, and when I plug it to the computer the Power LED turns on......

Any suggestions on how to fix this? 



AXE027 usb cable driver problems

Hello I have just purchased the start here kit and everything has bin going well up to the point of instaling the driver for the usb cable. I was able to get the programing editor no problem, but the driver for the usb is not working I have bin fidling with it for 2 days but with no sucsses. I cannot figure out how to contact picaxe about the driver problem so i was wondering if anyone has any ideas or ways on how to get the cable to work (for the record my pc runs on vista premium)? any help would be appreciated. Thanks

Advice on my next robotics project.

Hmm, I decided to come here on the off chance some one might be able to give me some advice.

I wouldn't say I'm an "absolute" beginner as I do have some experience with robotics, but its only been from kits, I haven't built and programmed something from scratch yet. Over the years I have collecteda great deal of items which I feel may be useful to create some form of robot, but its hard to know exactly where to start. Here are the details as follows: