Let's Make Robots!

Arduino

microcontroller choice

i have  a problem: i only have on uc, an arduino, and have to build a tx unit with some cheap ebay radio modules. does anyone have any suggestions as to a small microcontroller for this unit. it only needs 2 or 3 channels.

 

First day with Arduino

Hi all, After a long search got an Uno yesterday.. The Getting Started page in the arduino.cc website was very easy and followed the exact steps.

I went ahead did few changes in the led blink program in the example.. Got bored with the orange light (the inbuilt) one in the board. So I wanted to connect few colour leds to the digital pin and ground. I realised I may need a breadboard for this. Planning to buy one today.. Any suggestions / pages that will me help me learn more abt the Arduino and also please let me know the components I may need along with Arduino..

OPB704 Line Sensor

Intro:

I have received questions regarding the line sensor that I'm using on my mini sumo bot. Here I will post the schematic and pictures of the board. 

The OPB704:

An update to the Duemilanove
Using a
I started with the Propeller, but I've also used the PICaxe and played with AVR's and PIC's. With the release of the Arduino Uno, I thought it would be a good … Read more
navigare around via sharp ir sensor
Using a
this is a silly thing, had to make my own version of a clasic robot...... using meccano (erector) pieces, Arduino S3V3 single sided board, a pair of servos and a … Read more
I wanted to make a small Arduino robot using an original Duemilanove and the Robot Builder's Shield. But I also wanted to have a chassis plate so I can mount the … Read more

Many questions

Hi everybody. I have alot of questions and don't know how to find answers for them, so I would be very gratefull if you could tell me a precise location where to look for my answers.

So the questions are:

1. How to connect arduino severino to intellibrain board? I need to connect 3 of arduinos to one intellibrain only to send commands with coordinates so the arduinos can calculate the angles for servos to put the legs there, so i would only need to send 1 boolean to choose a leg and 3 integers to specify the coordinates.

Avoids obstacles, follow the line and solves mazes
Using a
<added basic Maze Solving video> <added wii nunchuk control video> <added line following video> Read more
Introducing Penny. She's beginning her existence as a Start Here style robot. However, she's based on an Arduino Mega. Video 1: Early testing of the servo and Sharp … Read more
Well, this is probably the simplest robot I've ever made. It is just this event's robot mounted in a old IBM box. I've built it just to serve as a testing platform … Read more

(Solved!) Low current from Arduino Output (Arduino Start Here robot)

 

EDIT: LED problem solved thanks to RobotFreak. I forgot to set the pins to output mode using the pinMode command. As RobotFreak points out, the Arduino sets all pins as inputs by default. I added a For loop to set all the pins to outputs, and everything worked great.

void setup() {
  pinMode(13, OUTPUT);  
  for (int pinindex = 0; pinindex < 14; pinindex++) {
     pinMode(pinindex, OUTPUT);  // set pins 0 to 13 as outputs
  }

It's 4AM: Arduino SHR Coded but not built

I've been planning an Arduino version of the Start Here robot. Today most of my parts arrived from SparkFun. This bot will be based on Ro-Bot-X's Arduino Shield for building robots.

Could you use the 256K of memory on the newest Arduino?

Recently the Arduino IDE has jumped from 0018 to 0019 and today I found version 0020 available with support for the ATmega2560!

To me this is great timing as DAGU is developing a new robot controller (Arduino compatible) designed specifically for humanoid and hexapod style robots that require a lot of servos.

The real question is, does anyone think they could use 256K of flash program memory? I thought 128K was heaps with Mr.Tidy's sample code being about 18K at the moment.

Is it worth paying the extra money for an additional 128K you might never use?

Controls a small RC car via PC with image processing
Small project to control an RC car via pc. I've placed a small RF pinhole camera in the car so I could be used for manual driving and for image processing. Here are … Read more

ADC and strange readings

Hello guys,

I ran this sketch that would simply read an ADC port and print it out to my pc. It went just fine and results were pretty consistent, something like: 300 300 300 300 300 299 300 300 299 300 300 and so on....

But when I use Serial.print(analogRead(whatever_pin)); in a larger sketch, results are very different, something like: 300 290 305 288  310 315 306 296 and so on. This "larger" sketch has 3 interrupt service routines, and the hardware setup has 3 different chips and a loudspeaker.

Arduino motorshield problem

Ok, maybe someone with more Arduino experience can help me out with this, because it's making me crazy! I've attached two sketches. The one called MotorTest comes from the ADAFruit website and functions perfectly with by robot. It ramps up the speed of both motors going forward, then slows them down to a stop. Then it does it again, but this time in reverse. As I said, no problems with that. The sketch called navigation is the beginning of my navigation program for my new robot (see http://letsmakerobots.com/node/22697).

navigate around via ir........
Using a
Very simple robot with sharp ir and microswitches.............. 3 servos and arduino brain.......     Read more
The fascination nowadays is that I could put in “cost ” 30€ or 30.000€. Read more
I decided I wanted to work with the Arduino processor, so this is my attempt to recreate the "start here" robot with an Arduino brain. I also intend this 'bot to … Read more
XBee Files - Part 1 - Basic Communications and Setup. Non-Stream Video :- XBee Files Part 1 This guide will take you through the basic setting up of the XBees in an … Read more
Holomonic Movement Kiwi Steering 2DOF
Using a
Hi to all, this is an Arduino based three omni wheels rover with 2DOF. The 2DOF is accomplished by three omni wheels on a continuous rotation servo (modified) each … Read more

Arduino bump switches

I Have my very first robot posted on LMR and he's pretty cool except whet he gets a blind spot on his Parallax PING)) sensors and hits a wall, burning the motors and wheels. I'm really really naive when it comes to programing, i know only how to understand programs people have written before for arduino. I do know tons about non- programmed electronics, though. I want to add something like bump switches to my code. I don't know how! assistance requested. My robot is Makerson and he's new on the front page of robots.

Allows you to send IR / remote codes in "background"
Hello guys. After hours spent on the internet trying to understand how stuff works i came up with this piece of code. It simply sends out SONY remote codes, but the … Read more
Remote controls an Arduino/ PICAXE board connected to a computer by another computer using a wirelles network
I've tried to do this a while ago and I've had some problems finding documentation about this, so here is a quick and simple tutorial. First of all you'll have to … Read more
Navigates remote controled by another computer
Using a
  Hi there!   After seeing the tank tracks that amando96 did for his AATV, me and Purdom decided to build our own tank. We've started building it last Saturday … Read more
A cheap LED matrix driver run by an Arduino
I’ve set out designing what I’d like to call Arduquee, a Arduino powered Marquee. The idea is this, low cost LED matrix driver boards that are easy to work … Read more
Wanders around avoiding obstacles
Using a
This is a Start Here robot style I built for my daughter Julia, so she can have something to play with, because she keeps bugging me wanting to play with my … Read more

Arduino Duemilanove and small DC motor, no controller

Hello, I'm new into the world of robotics, I don't have much experience with electronics and I'm waiting for my Arduino Duemilanove to arrive.  
Will it be OK if I connect this

To one I/O pin (set on output, HIGH) on Arduino and the GND pin, or will the atmega chip burn?

Interpretes Logo commands coded by black and white boxes on paper strip. Draws accordingly :D
Using a
Hi, everybody! I'm back with my new robot - LogoTurtleBot. Read more