Let's Make Robots!

How to change the robot direction in Picaxe

Hello everyone ,

                I am new to picaxe , i am making a two and a three whell robot , i am stuck in a problem of rotating the robot body to other directions using picaxe commands . I need some help .

Hair dryer components not dangerous?

I've recycled the nichrome wire/element from a couple hair dryers and hot hair curler station for use in a 3d printer project.  All of the houshd items have an unusual heat proof material supporting the heater wire.  It is very thin,  almost feels like a stiff cardboard, but doesn't have any layers and light can be seen through it. Has a silver, mother-of-pearl type finish.

  It doesn't seem to burn since it holds red hot nichrome wire. I just want to make sure it is not asbestos or something.  Does anyone know what it is?



Stuff to get rid of

Hey guys I have some stuff that either I have no clue what it is, I dont know how to use it, or just simply dont want to use it. Ill post some pictures and things as I find stuff.


Here is the first thing, It is a bluetooth module I bought off ebay and didnt know it wasnt broken out. If you want it, PM me an offer. :D

A new cheap 2D Robotic Obstacle Detector

It allows your robot to determine the distance to obstacles and walls and to avoid them.

Here are some parameters:

* detectable range: 20 cm to 150 cm (6 to 60 inches )

* 7.5 degrees angular resolution

* 2 scans per second

* 180 degrees view

* easy interface with other boards it comes pre calibrated

* USB interface power and data  Rs232  and SPI

It is intended more for terrestrial robots (is a bit slower than the laser rangefinders) 

Here is the link :

Servo problems!

I'm having a lot of problems with the servos I'm using to build a quadruped robot. I should start by mentioning that I bought the servos from Dagu like 4 years ago, BUT most of them had never even been unpacked until recently.

The problems are the following:

Which voltage regulator to use?

Hello all,

For my project, I intend to use a 3.7V LiPo, 4400mAh for my datalogger. 

With my Arduino Pro Mini comes the MIC5205 LDO regulator which I'm using now but I intend to build my own PCB and am looking into other regulators / buck-boost converters.

Which ones would you recommend? I'm very new into this so any help is appreciated.

Voting is now over for the Village to Raise a Child Campaign - 2552 votes

Hello guys,

Some of you might know that I had submitted my entry as part of the Village to Raise a Child Campaign. It's about changing the way Nepal learns through building robots.

The campaign has reached the voting phase and I am in need of your support.

Please support this project by voting at : http://tinyurl.com/lyv86lz

Linux: no /dev/ttyUSB0 device created when plugging picaxe28 board with picaxe27 cable


I'm playing with the "start here" robot kit and having trouble. I'm expecting the device /dev/ttyUSB0 to appear when I plug the picaxe 27 cable on the picaxe 28 board. Nothing appears. I have tried the 2 first solutions in the picaxe manual and I am not going to recompile the kernel, as suggested in solution 3. (using my working computer here).

I'm currently running Linux Mint 17 64 bit, based on Ubuntu 14.04 LTS. I have admin rights.

I am using linAxepad 1.5.0.

Flash Memory of Arduino Uno


Sketch uses 13,308 bytes (41%) of program storage space. Maximum is 32,256 bytes.

Global variables use 2,082 bytes (101%) of dynamic memory, leaving -34 bytes for local variables. Maximum is 2,048 bytes.

processing.app.debug.RunnerException: Not enough memory; see http://www.arduino.cc/en/Guide/Troubleshooting#size for tips on reducing your footprint.

adopted a h bridge here and facing issues

Hi all,

ages ago I found oddbots cool h-bridge on this page which works quite well. I started with 100x160mm boards and made two boards for two bridges in order to controll 2x2 motors.

A few weeks ago I got into contact with the pcb-tool Eagle and gave it a try to place two h bridges on one board 100x80mm (freeware edition).

As far as I can see I just copied the bridges. The only think that differs from the two-board version is, that I used the same power/gnd traces for both bridges.

Help with an uncommon controler board

Since the last kid code workshop I participate, I have one kid that send me email questions on programming.

He is 11yo, a little specific as he's highly gifted (don't know the proper english word) and questions are always interesting ;)

Nothing for LMR at that point.  But this week end, I was invited by the parents and discovered that he wanted also start some robotics.

WANTED: Arduino Mega Or Clone

Does anyone have an arduino mega or a mega clone that I could buy or trade parts for, or do you know where I can find one for cheap.





Simple servo bracket

Birdmun an Hi jinx got me looking into open scad, he is code a bracket for a servo you can adjust just by playing with a few numbers, the software is free and there's some tutoreals on line and youtube, you can export STL's as well. I did not think I would like it but after playing with it, my mind is more open, for simple shapes it is very fast.


Servo Bracket p, li { white-space: pre-wrap; }



New to robotics and need help.

I have never made a single robot before but I have done a fair amount of research and want to create an obstacle avoiding robot! I want to use the arduino uno r3 for the brain! Anyone know of a guide to build in a fairly inexpensive or arround $50 to $60 way sense this will be my first robot?

Wanted: 12V Batteries

Does anyone know where I can get some 12V rechargeble batteries for robots, I wanted about 2 or 3 for a robot that I plan to build. I would prefer them to be LiPo over the big bulky black ones but I will take what I can get.


I will post what I have later on today when I get home.




Fuzzy Logic Controller

Hello Everybody


I want to design a Fuzzy logic controller to control two  DC motors of Rover robot  , actually I made a simulation for the controller in matlab/simulink and it worked successfully , now I want to design that controller in real world by using Arduino Uno board , actually I converted the MATLAB Fuzzy Inference System FIS to Arduino C by Converter in the "www.makeproto.com" website .


Now for example if one of rules base of fuzzy controller is 


Which is the best windows PC programming language for the following Robotics project?


I am actually very new to the robotics field. I am trying to build an equipment. I was hoping if someone would be able to give me a few advices on the project. 

The current way in which we are planning to connect the hardwares together is as follows

Stepper Motor, RVIT, Foot Switch ----> Arduino ---- > (via USB) PC 

Weighing Machine ----- > (via USB) PC

Camera ----- > (via USB) PC

Speaker ----- > (via USB) PC