Let's Make Robots!


Doodle Bot - beginners platform

The Doodle Bot is a very simple robotic platform for beginners, students and hobbyist.

The Chassis is a simple laser cut panel with two ball raced geared motors and a servo for raising and lowering a white board marker, jumbo chalk or crayon. Each wheel is fitted with an 8-pole magnet that is monitored by hall effect sensors to form two simple wheel encoders.

The kit includes an Arduino compatible controller with an ATmega8A processor, USB interface (CP2102) and FET, dual "H" bridge. Sample code allows the user to write simple alpha-numeric text messages.

navigates a maze and finds shortest path
Using a
This is Mazie, the maze solving robot. She is my first project using arduino. My eventual goal is for her to follow a line maze, then go back and find the shortest … Read more
Reads RFID tags then plays .wav files, also uses a mic to hear loud nosies.
Using a
     This is a copy of the RFID bear on Make. I have however added a few new features in the code like a ram check, a random file player and a sound response. … Read more

Tracked Telepresence Robot

A friend of mine (Dimos) from another site (www.GRobot.gr) started building a tracked robot that would be operated remotely.


What is your favorite Arduino compatible board?

I do like a lot of controllers (and I am sure there are more to come!)

On the subject of the Arduino:

What is your favorite Arduino (program / form factor) compatible board???

Mine is: The Uno32 because it is a fast Arduino and can be so much more (has a PIC 32 bit chip)! I still wish it was a 5V I/O board, but 3.3V is here to stay...


This is the tank. One day, perhaps it'll earn itself a real name. Being my first robot, it is of course a skid-steering obstacle avoider. Since I already had an … Read more

FreeBOT (work in progress)


FreeBOT - Is a Biped robot designed in Google Sketchup and printed out on a 3d print. My aim is to make it Free to everyone to print and improve. Since I can't afford a NAO.. this was the next best thing :-)

R/C with arduino & NRF24L01+ 2.4GHz Antenna Wireless Transceiver Module


October, 11th 2012

Well, my prototype remote controller is nearly finished now.

Bellow you can see the ON/OFF switch placement (that's for you Hoff).

The backside of the board after a hand of nail polish (yeah, I know, yet another archaic method). Also notice the little blue jumper wire that I had to add to correct Eagle's auto-routing mistake (and my blindness to detect it at the that time).

In the video you can see that the robot stays at roughly the same spot on the floor and handles a lighter push without any problem. To achieve this I have two … Read more
Can solve maze via ultrasound,Can grab object via ultrasound
Using a
Forgive my poor english.. Many thanks to LMR and special thanks to   BIRDMUN , ANTONIO.CACIUC,BASILE and   peter ROBOTFREAK This is my first robot that is capable … Read more

How to Build a Ping Pong Robot (YouTube)


The ModuPong YouTube channel is about a modular robotics system that tracks a ping pong ball in real-time. In addition, we cover in this channel how the system predicts and responds in less than 130ms.

Please tell me if you have any ideas on how we could make our system better. Cheaper and faster would be great!

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?  

Introducing BoardX: The Open Source Miniature Robotics Motherboard

Hi Everybody!

Long time robot enthusiast here, but just joined up after searching for some robotics tutorials. I'm searching for ideas to create a beginners robotics kit for my open source project, BoardX.

I'm going to post some information here, and if anybody is interested in purchasing one, send me an email and I'll give you instructions on how to get a discount!

Here's my site: http://www.upgradeindustries.com

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:


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)

Navigates via sound (as a contact switch) or IR for obstacle avoidance
Using a
A while back, JAX and I got to chatting about our first robots.  Mine was a "Movit Peppy Mouse:" Read more

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

Arduino and a Chinese 32 channel servo controller

I bought a Chinese USC 32 channel servo controller on ebay a month ago. Last weekend I finally found some time to try it out. But I can not get it to work with my Arduino Mega, actually I thought there was something wrong with the board, unitl I downloaded the Chinese software for it, which lets you test the board. I connected 2 servos and the sliders in the program let the servos move. So the board works when using USB.

This is the link with the manual: http://www.torobot.co/usc32-manual

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).