Let's Make Robots!

Where to start with robots?

Hi there

I want to learn about robots, what they are made of, all the parts names, how to build/program robots and where to start with robotics? (mainly just the stuff to get me started)

Are there any websites that have this information on them?


AIML to C converter?

I know there are a few C to AIML converters out there, but are there any programs that do it the other way around?

Battery pack connector

One of the wires that connect the battery pack to my microcontroller, that go in slots labelled V and G, disconnected from the microcontroller. Does that mean I have to solder it back on? Is there another option?

Arduino + a doorbell's wireless modules

hello, hope you had a merry christmas, and will have a happy new year!

I found a wireless doorbell, and i would like to know it it would be possible to attach the button of the doorbell, to the TX pin on the arduino, and the receiver to the RX pin, sorta like this:


I think i would then be able to serial print what ever i want, and serial read it with the other arduino. say controll severall motors, even if it just has one button, would this be possible?


When you get suspended bits (or nanoparticles for the science geeks out there, haha.) of iron compounds in a solution made up of water, oil and some other bits of scientific goodness, things look like this.


Living Doll?

I had this epiphany a while back about a robot. What if you put a stuffed animal suit over a robot? (Exposing the sensors, of course) This is basically the foundation of most toys, but I think it'd be really sweet to have a "living" doll walking (or wheeling) around the house without shrill barks or other annoying noises going off every 5 seconds.

Or perhaps the near Wall-e look is getting old for some? I dunno. For my robot, I wanted to create a white, Dayna from a Witch's Tale-ish, mouthless cat with a black bowtie. Maybe a rabbit instead?

Direct pin reading/writing instead of digitalRead and digitalWrite

Hi guys, I'm trying to make a bit bang serial connection through mega328 and Arduino seems to lack speed as the connection never happens. Here is the code, so you can better understand what I'm trying to do:

Rf links sending and interpreting

I have made a controller and trying to start programming. This is my first time playing around with rf links. I have went through gareth's walkthrough and get messages to print on my screen, thats cool but what about sending other stuff. My question is must i always send messages or can i just send integers? Also i need a bit of help on how to get the receiving code to interpret the message or integer. 

Arduino Duemilanove and Ardumoto SparkFun Motor Shield help

Hello all... first post on here :)


I am very new to Arduino and coding, for the past few days I have been struggling with some code. I am working towards a small Arduino based rover with two DC motor for movement control. Before I build a body and all that fun stuff I wanted to get basic controls working.

With the code below I can move forward, backward and the BR200# and so on...  (RB case) all work. When I try BF200# nothing happens.. I thought it might be due to the LOW settings on both motors as the HIGH HIGH works ok. 


Problem with SparkFun PicAxe USB programmer cable

Ok, got to the point where it's time to start coding and I got power to everything that needed it and started installing the drivers needed for the Picaxe programmer cable. Well to no avail. If anybody has an idea a walkthrough it would be appreciated.



PIC processors

  I am getting use to Parallax basic stamp and find it easy software to use. Curious about PIC processors. They have many kinds and sizes. I am interestted with as much I?O as possable and imfo on an inexpensive programming board and perhaps a proto board later. The programming language seems similar to me. What is the compairison besides price. I am not a beginner with electronics just programming. Any helpful imfo would be appreciatted. Thanks in advance.

line follower

actually  i am beginner in autonomous bots, i am making a line follower . i wanted to know whether its necessary to give  time delay  while programing the bot. if yes then how can we decide the right amount of time delay??

PolyMorph Hand (Anthropomorphic)

This for sure will be one of my next experiments........

Edit:- ........ Already experimented

Wheeled to Biped conversion

Greetings. *spock sign*

 I have been reading a lot of these articles over a period of time while trying to develop a good understanding of robotics before I begin making them. (It's always a good idea to test the water before jumping into a lake, right?)

Start robot pins

I really hate to ask this question, but what pins do you need to put onto the microcontroller to connect the servo and sensor? I ordered some online that I thought were correct, but they do not fit. I tried going to my local Radioshack to get more, but they sold zero pins. I'm going to order more online, but I would like to ask first to make sure I'm getting the correct items this time.

AXE 045 RGB sensor


 Does anyone around here have any experience with the AXE045 RGB-sensor from Picaxe? I connected it to my Picaxe 28X1 microcontroller and I am only able to get readings from about max 40 for red and blue, green only gets to one or, if I shine directly into the lens with a flashlight, up to 9.

 Any help?




arduino code probs(again)

ok the motor code works fine now, but now i added, some of the 2-10cm infrared sensors ,and the code just drives forward, as if it doesnt see the infrared? any help would be appreciateted ,here is the code

int infra=3;
int value = 0 ;
int infra2=4;
int val2= 0;

void setup()
  pinMode (11,OUTPUT);
  pinMode (10,OUTPUT);
  pinMode (3,INPUT);
  pinMode (infra,INPUT);
NEW: the first 2 parts work the third doesnt 

LCD not quite working

Here is my LCD. http://www.sparkfun.com/commerce/product_info.php?products_id=709. The backlight is working, which isnt much. The problem is that it just isnt displaying the messages. The code is the code in the example and i am very certain it is right. The pins are in the same pins as the code and the example shows. So assuming that this is connected right, i think i may know some of the problem.

Could the 6v i supplied have fried it?

Another capacitor question

I'm working out my understanding of capacitors, I'm a bit stuck on the differences between these 2:

Mono Cap from Jameco


l293d problem

Ok so what does this mean....

 1. the four corner pins are connected to 5v

2. the 2 middle pins on each side of the chip are connect to ground

3. the pins on the outside of the ground pins are connect to the motor

4. the pins on the outside of the motor pins are connected to the inputs.


I have verified those contacts with a multimeter and they are all getting there respective connections and voltages.  

So it is connect correctly.