Let's Make Robots!


WiFi - how can I talk to my bot with it?

I don't know much about networks and communications but most laptops and routers these days are wireless. Can we use this to interface with our bots?

A quick google on WiFi protocol told me that it is technically referred to as the 802.11 protocol.

The Xbee transceivers can also form a wireless network using the 802.15.4 protocol.

06, March, 2009 first test                     Read more
This is the very popular 2.4GHz XBee module from Digi (formally Maxstream). These modules take the 802.15.4 stack (the basis for Zigbee) and wrap it into a simple … Read more

Roboduino Tank Tread Base

We finally have our base for the Roboduino. I made a post to our site at: http://arduinofun.com/blog/2009/03/01/roboduino-base/


This is my first attempt to make a custom remote controller, and also my first customized Arduino.
After seeing this post made by ObbBot I wanted to try to make one myself.

I figured that if I purchase one remote controller it would be cheaper than buying two of these and paying shipment to Portugal.

So, ripping the guts from a game remote controller I get two joysticks, a couple of buttons, two nice motors and one small lcd.

Since I started messing with robotics that I wanted to build a tank, and finally that moment arrived when two Tamiya thread kits and a Twin Motor Gearbox arrived. … Read more

PPP over XBee, aka xbee wireless

hello, i was thinking about this stuff: if i have two computer with two xbee connected with an usb connection with a FTDI chip, it should be possible to establish a PPP connection over the (simulated) serial port.

Am i wrong?

with 250 kbps (let's say 20 kB/s ?), reduced power consumes and long range, they could make a good solution.

Ladyada XBee adapter, not so good for Pro modules :(

Hi, just a note to warn you, in the case you're interested in LadyAda XBee adapter for an XBee-pro module.

They're advertized as being compatible but that's not really the case. The PRO modules have a longer tail that goes over the capacitor in the bottom, which prevent placing the module at all.

The guide says: "Make sure the capacitor and regulator sit close to the PCB, especially if you're planning to use an XBee Pro module". Unluckly, that's not enought.

This is my first experiment working with the XBee modules, and I thought it would be cool to control Farrusco. So, … Read more

separating several sensor values

I´m starting a project were 2 Arduinos comunicate through wireless modules (XBee Pro).

Arduino #1 has two potenciometers and sends their values
Arduino #2 recieves the values like this:


Now I need to separate this values and assign each one to a variable.
But I´m stuck here.. any help would be apreciated!! 

Xbee modules

hello! anyone of you ever used one (well, two) of those modules? I'm interested but there are many version to choose among.. Any experience to share ?

Also, is the XBee USB exporer enought on itself to connect an xbee to a pc ? looks like a good solution for the pc side.

  Update: 13, April, 09 This time I added the Solarbotics L298 Compact Driver Kit, the car is now much more powerfull and it is very cool to drive.   Read more