Let's Make Robots!

rf

This Robot is controlled using Arduino...I have used 433Mhz RF modules so that the Arduinos can communicate wirelessly...the robot uses differential drive in order … Read more

RF connection

hello,
  i would like to connect a accelerometer to a RF transmitter nd the RF receiver to my picaxe 28 board having picaxe 28X1micro  controller,.
 can anyone tell me how to connect the trasmitter to the accelerometer nd the receiver to picaxe.


I ws thinking of buying this RF transmitter nd receiver-http://probots.co.in/index.php?main_page=product_info&cPath=22&products_id=29 

Reprogrammable remote for use with all my Arduino bots
Using a pair of APC220’s from Core Electronics, an Arduino Uno and Nano and a SNES controller I made this nifty retro looking reprogrammable controller for all … Read more
I will update with "4.x" build.  But wanted to get video up as demonstration of concept.  SSH-->RPi-->I2C Optoisolator-->Arduino Mini Pro--->Self … Read more

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

RF shielding

The encoder wires on my Rover 5 seem a little short.  The ground wire seems to be a shield around the other three conductors.  Also, I notice that the pin groupings on my 4 channel motor controller have a ground.  Makes me think a little.

Really small RF receiver

hey guys,

so i am building a really small robot( 25 X 25 X 10 mm) and i want it to be remote control. I wanted it to be controlled by IR initially but i found that IR cannot work in direct sunlight so i thought i need an RF unit. Do you guys know of any really small RF receivers. I was thinking of those used in real cars for door unlocking. What do you guys think??

Irritates my wife when she is watching TV
Using a
  This is my second project. When I built my first robot I was not aware of this site, so I'll post about that in few days.  Read more
Warns me when a parcel or letter enters the Post box - "FireFly" Themed
     For years now i have wanted to "Hot-Wire" my Mail/Parcel Box, unfortunately most mail boxes in CH can only be found on the ground floor (strange but true) … Read more

Xbees and rf modules

Hello guys. 

I was thinking about buying a few xbees for my lasertag project but since they're a bit costly i wanted to ask you if it fits my project before buying them.

I'll tell you what i want to to: basically lasertag is a game where there are lots of players that "shoot" at each other with IR pulses. What i wanted to add to it is some sort of "hit feedback", something, be it sound or LED, that tells me whether or not i have succesfully hit my target.

Stuff in the mail

Horray.

Today i just received two packets in the mail. In one of these was an lcd which i bought for less than 5$ incl. shipping, while in the other was a 434 mhz rf link kit, which cost around 8$. So far i haven't tested either, as i received them moments ago. I will soon be using them though, proabably to make a custom arduino rf controller, i only need a second arudino..

 

 <== picture right here

Measures waterlevel in overhead tank and sends the data wirelessly to handheld indication device
Here's a nifty project I came up with to help the people at home. It's a system that checks the waterlevel of an overhead tank and sends the data using radio … Read more

Inductive Guidance

       I am trying to build a robot lawnmower(yes another guy trying this).. I need to understand Inductive guidance or RF technology a bit better to build a buried wire circuit for this.. I have read alot on the web and am starting to understand inductor/capacitor circuits.. I built a transmitter using a 555 and a 2n2222 to raise the current in the wire.. I then built a L/C circuit with a 339 comparator and I can tune it to pick up the signal from the wire(I can see this on my oscilliscope)..

Wireless Control

im looking to control my picaxe robot wirelessly by either my computer or remote control..
what is the cheapest method and how would i go about doing it?
thanks muchly

Super Capacitor in solar power supply - a few queries

I intend to build a remote 'weather station'

The station will:

  • Be completley independant of any external power, ie, it will produce its own power via solar cell(s)
  • Measure temperature only
  • Transmit its finding over an RF link to an indoors reciever

Instead of using a rechargeable battery supply with charger circuit, i have decided to use a 35F, 2.7V super capacitor to smooth and store power.

Building a Universal RF Remote - Questions

More Recent UPDATE: the competed remote can be found here. Thanks to fritsl and rik for their respective helpfulness.

UPDATE: Attached (and blurrily pictured below) is my schematic that i think will work for this remote. Yes I drew it in paint, Yes it took too long:

*The "To Breadboard" leads are included so that the remote may also serve as a portable power supply.

 

 

 

recieves commands sent by a computer thru a USB port and executes commands .
Using a
hello all ! , im new here and this is one advanced creation of mine which im going to submit here and follow up on its development . Read more

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:

doorbell.jpg 

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?

"Wiieasy Rider" Nunchuck /Arduino hack controlling Tamiya Off-Road Car

 "Wiieasy Rider" Nunchuck /Arduino hack controlling Tamiya Off-Road Car

Update :- Code posted

                  >>> Car Park Video of it in Action at end of Blog <<<

Goal:- Hack a Tamiya Off-Road RC car - and control it with Wii-Nunchuck controller

Arduino RF remote LCD display of Temparature & Humidity

Aim of Project :- Transmit via RF remote values of Temparature & Humidity to a LCD display.

Why:- because i have always dreaded sending floating point values to a LCD display and

wanted to carve it in stone for other projects i have lined up.

& Why :- RF Links are just so cool 8-P        500ft range is not to be sneezed at......

RF communication link between two Arduinos
This Tip/Walk-Through will guide you through a simple one way communication link between two Arduinos. The Project uses these RX/TX Radio Frequency (RF) Link … Read more

No need for oscilloscope, nut cracked, bright debugging ahead!

YES!

I do not have an oscilloscope, and I "always" wanted one. "So I could debug & understand & see what was going on".

Yesterday I got so frustrated that my cheap RF still was not 100% rock solid - even though I had made all sorts of initializing strings.

i got so desperate that I decided to buy a used oscilloscope. While checking out what was on sale in my area, I got the idea that perhaps I could make one myself..

That got me to look into .. "perhaps someone out there made a SW oscilloscope - how hard could that be?

This tiny Xbee 900 rf module is supposed to have a range of 15 miles. We all know that these specs are always best case scenarios that are not attainable in the … Read more

RC RF directional beacon

I am still wondering if it is possible to create a simple, cheap, fairly accurate, directional beacon for outdoor use. And I keep thinking I should try to re-purpose an RC transmitter. So here it goes:

Would you deem it possible to create a directional antenna for an RC transmitter?

Would this antenna be able to rotate? Fully continous, or just 360 CW followed by 360 CCW?

Which RC system would you consider? There are so many frequencies in use. And modulation types.

Simple tracking project

I have been thinking about this, any ideas? i mean like what components i could use, using radio frequency not rfid or neither gps. could really appreciate help.

 

Baiscally it should have a screen where i could track my robot within 100m? try to keep it cheap i guess 

 

 

 

 

update

 

 

 

It is supposed to be something like a phone where it has a screen and i can see the object like a radar. it would also make me able to flash an led at the other end of the wireless device p