Let's Make Robots!

Arduino

how to send sensor values wirelessly

i know how to send messages to another arduino but im not sure how to send sensor values here is code to transmit the word hello 

If you could show me an example code it would be great.

// 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

cheap wireless shields for arduino

I was looking for wireless shields for my arduino and stumbled across      this http://www.kickstarter.com/projects/1608192864/open-source-wireless-inventors-shield-for-arduino 

its a wireless shield for arduino that has 177meters range and is easy to program check out the link above for more info

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

Sending serial from python to an arduino

I'm working on a project where I send a bunch of data through an arduino to my laptop.  I'm using python serial to read in the serial data.  That part is working fine.  Then I do some processing and I want to send the results back to the arduino.  This part is not working so well.  

It seems like python  serial.write()  only likes to send strings?  Right now I'm trying to send back one integer value.  Any ideas how to do that?  

Solve's a maze and remembers the quickest route.
Using a
aMaze is A Maze solving robot. Custom build using an Arduino bootloaded atmeag328p as the brain, a SN754410 as Motor Control, all wired on a solderless breadboard … Read more

Try this....

Take a look at this:

http://cubloc.com/product/01_01cb210.php

It LOOKS like an Arduino (but its not). Same basic Arduino feature set. (add a power switch and a little more neat stuff)

It runs ,,,,,, tada ,,,,,, BASIC!  (Don't run, shake or shiver!)

(It looks one HECK of a lot like P-BASIC (STAMP 2) but has more commands and floating point.)

The editor can be downloaded and looks nice, but nothing special.

The manual looks nice and well organized and is BIG, but again is nothing special.

QRD1114 Resistor Values

Hi all,

I'm using a QRD1114 sensor for a line-follower. Datasheet: http://www.fairchildsemi.com/ds/QR/QRD1114.pdf

Im hooking it up with this schematic:

However, I'm unsure how the value for the 10K resistor was calculated? It's acting as a potential divider, right?

For the LED im guessing that the value of 220 was taken from doing:

R=(Input Voltage - Max Forward Voltage)/(Optimum forward current)

Lets Make Robots or Lets Make Radars?

A while back I notice the simularity between the Ultrasound/IR sensors we use on robots for object avoidance to the concept of basic RADAR. (This is more like UDAR or IRDAR). Direction and range information are what the controller uses to detect objects (RADARs basically use the same information.)

So instead of building robots for a while I decided to see how good I could make my own IRDAR. Wow! One can adjust trigger point, gain and a bunch of other factors and have a way-cool little system!

Navigates to GPS Points with Object Avoidance
Using a
Autonomous Robot - GPS, Tilt Compass, Arduino Mega, Wild Thumper Motor Controller, Wild Thumper Chassis. What else do you want to know about this robot?   Read more
Alright ! After a haitus and some odd but trivial glitches I am finally happy to declare the birth of ANTROBOT Ver 1.0.0. Its a 2 legged creature with a single … Read more
Seeks light to charge batteries (photovore) and avoids obstacles
Using a
If you're a FaceBooker, please visit Fiji Water's page (http://www.facebook.com/fijiwater) and "like" Fijibot! It was posted July 11th. Fijibot is an autonomous, … Read more

Helping a special friend with his first robot,

I am helping with my friends first robot! He primaily wanted tractor treads and an Arduino "because he heard they were good" ( I didn't disagree with him. :-)

We decided on an inexpensive kit was a good starting point and then it can be expanded later.

Our choice was the BrutusBot and electronics package (looks like I get to solder 2 boards, lucky me...). It was fairly cheap.

He seems good in the programming and mechanical areas, he isn't so good with the electronics part (he does fine with some guidance).

 Salvius is a humanoid robotics project that I have been working on over the past year or so. The robot now has night vision and ultrasonic hearing. You can … Read more

Attiny-Duino or whatever?

Hi geeks ;-)

I am thinking about to shrink some of my projects. That's the deal. I am planning to build a Attiny-Duino.

What would you think about it's usage? For myself I would use it in the Insect bot to reduce the weight, costs and power comsumption.

UPDATE June 8 2012:

My first PCB since 1988 and I will call it AT-LUMI-TINY ;-) This board is still far from perfect (see the jumper wires) but it's my first 1-layer board created on the computer. 

Shines toward Spectator
Using a
The Starbot is a custom robot made for one of my sons. It is a star that shines and rotates to where the spectator is. My son found this wooden star-on-a-stick … Read more
Scare the Little Brother
Using a
One day my boy came to me and stated that his cardboard monster should scare his little brother. He specified that the robot shall appear when someone makes noise … Read more

An alternative Language/OS for your Max-32

Did you buy a Digilent Max-32 for the 32 bit processor and the Arduino compatability (these boards are VERY Arduino compat.)

Do you know you have an entire OS including the Basic language available to you for FREE???

See the following website for details on: http://www.cpustick.com/ (StickOS).

(By the way, those with a Uno-32 boards are not left out, you can do the same thing!)

Eight Lights with two pins Clock and Data
I was working on my Picaxe 28x2 robot from http://letsmakerobots.com/ and I wanted lights and I needed more sensors. I had four input pins left. With the 28x2 you … Read more

Controlling a robot from Google+ Hangouts

Hi guys

I'm trying to create a google+ hangouts application to let us to control a robot (like magabot, for example), directly from there.

I already created the interface of the application, it is actually pretty simple, if you want to have a look it is hosted here: http://magabot.cc/hangouts/magabot-hangouts/.

Line robot sensor

Hey guys, i want to build a line following robot and I was scouring ebay for some sensors

 

I found these but I wasn't sure if they would work, as I haven't done this before. They're pretty cheap.

How to make a controlled Arduino Robot via Bluetooth by using an Android Device

Can you Please teach me How to make a controlled Arduino Robot via Bluetooth by using an Android Device :D 

 

I found some Application in Play Store about the Bluetooth controller, it is called Bluebots ,a Bluetooth remote control for robot. (see below)

https://play.google.com/store/apps/details?id=blue.bots.free.matt&feature=search_result#?t=W251bGwsMSwxLDEsImJsdWUuYm90cy5mcmVlLm1hdHQiXQ..

Comming to grips with arduino, bootloaders & ISP...

UPDATE/ADD-ON: June, 6th 2012

---------------------------------------------------

For the sake of argument, let's pretend I'm a bit thick in the head and also that every day is a Monday for me.

Being a bit reckless in some respects, and hating the shipping wait times, I've ended up ordering a few ATmega324 chips, so the current Atmega328P-PU tally is:

- 1 blank

- 1 w/ the duemilanove bootloader (supposedly, but I believe it so)

- 2 w/ the uno bootloader (which I have some heavily suspect might be blanks or w/ the duemilanove bootloader instead)

Wifi/ Ip enabled car

Hi

I am intrested in making a car that can be controlled anywhere through wifi. I do no know where to start and how to do it. Does anyone know what to use (arduino? arduino with ethernet shield? arduino with wifi shield?) or any good step by step instrunctions on this?

Anything would help

Thanks

A robot that can crawl or turn into a circle and roll itself around for locomotion.
The TROLLER 1D is my newest robot project.  The concept uses a series of simple 'links' to make up the TROLLER.  Its locomotion can be similar to that of … Read more
Roam randomly navigating around obstacles by using ultrasound
Using a
YA2WDNSOSBBALABMHAMF (Yet Another 2WD Not So Original Starter Bot But At Least Assembled By My Own Hands As My First) or just B4short, --- a tale of many horrors, … Read more

2WD Robot, ArduinoMega 1280, PanPing sensor problem

Hello everybody. 

First sorry for my English but not good. I want to ask the profis about my robotics problems. :) 
I have a 2wd mobile platform. I played with this so many and my old simple codes was working well. 

But I decided, I want to upgrade a little bit my "stupid" code which was very good with the fixed ping sensor and some IR sensor but too simple. Than I rebuilded all IR sensor first, and builded a little servo for the PING sensor.