Let's Make Robots!

Has anyone ported Bill Porters Easy Transfer for Raspberry PI?

I *REALLY* like Bill Porter's Easy Transfer library for Arduino.  Yes, I've Goo-oo-oo-gled this, but have not found any hits on Easy Transfer (Bill Porter's Easy Transfer, as opposed to that MickeySoft product)  for Raspberry PI.  


I would Love to be able to move a struct { }  from Arduino to Pi, just as easy...

New beginner with Robotics.


I'm an absolute beginner with robotics, and would like to make a serious start, but I'm not sure where to start, should I read books first? I want to buy the tools and parts I need, but I don't want to spend a lot of money, and then I can't use it.. 

Maybe someone can help me! :)


Thanks in advance!

Using Diodes for voltage drop

Hi, Im building a walking robot, and intend to use a 7.4 volt lipo to power the Arduino Nano, with a seperate connection from the battery to power the servos.

My question is, is it ok to use diodes wired in series to get the required voltage drop to power the servos.

The servos are rated 6.0v max, and I have wired FR107 diodes in series to give me about 5.6V. 

The problem is each diode has a drop of  0.3 volts, so its taken quite a few to get where I need to be.

I used the FR107 diodes because I had a whole load in my parts bin.


I tried to connect SKYLAB SKM53 GPS Module with my Arduino UNO , and i followed the instructions in this link

but my result shown like this..

Latitude : 0.0000000 :: Longitude : 0.0000000
Latitude : 0.0000000 :: Longitude : 0.0000000
Latitude : 0.0000000 :: Longitude : 0.0000000

I tried to connect the gps with external supply but still not working.

I need to know what is the problem? I tried with another code but it still not working.
I need help here..

make a robot go straight when going forward

I want my robot to go straight, I use transistor with variable resistor. It is going forward but it is not a good method, when turn off and turn on I have to change the variable resistor until it go forward straight again.

-Any cheap method?

Suggestions for a free C Compiler and Debugger please

Hi all looking for suggestions for something free and good to practice C code in .

I run on windows Vista so need something compatibale with that ...

reason im asking is there is so many to choose from and im not sure what i should really be looking for ...

not knowing what each one has or has not im really looking for one that has a debugger ... not sure if they all have this feature or not as the only programm im used to programming in is the arduino programmer and this dosent use a debugger.

Happy Valentine's Day

As a maker or electronic hobbyist, what special gift have you made for your lover today?

ICStation use 22pcs MAX7219 Dot Matrix Module and make this gift for all ICStation fans and wish you Happy Valentine’s Day.

How do you like it? :)

Controlling a robot with an RC Plane Controller

Hey guys, I have a few questions! I need to make a few robots for different competitions in my college, and they need to be manually controlled.

Fundraising for the chicken

Hello everyone.

I didn't really want to post on here but Bas conviced me too, so if you don't like it here, blame Bas :)

I am currently running a fundraiser to purchase a new camera to record videos with.

Quoted from my site:

Enter to win a $50 Gift Certificate

In a short time, we’ll be releasing Actobotics kits online...

Thoughts on reverse engineering a wind speed sensor

A friend of mine wants me to make him a weather monitoring station. Temperature and light leves are easy peasy, but ideally wind would be useful too (this thing is going to have a real life purpose!!)

i found this little fellah on fleabay



wild thumper conroller SCmode

I'm trying to control right motors , left motors and servos using ( SCmode ) , i replaced the default mode ( Cmode ) from RCmode to SCmode at constants.h , should i have to change Baud rate from 115200 to 9600 ?

I tried to implement these commands at serial monitor but motors did not rotate

FL = flush serial buffer
AN = report Analog inputs 1-5
SV = next 7 integers will be position information for servos 0-6
HB = "H" bridge data - next 4 bytes will be:
         left  motor mode 0-2

Robotfest in Maryland anyone?

I know its like 2 months away, but do any of you guys attend RobotFest in Maryland?

I'm finally able to go this year and wanted to see if anyone else has been before and what its like.  I've wanted to go for a few years but due to having very small children it seemed it would be difficult to take them with naps and all.  This year my son stopped taking naps and its only like an hour and half from my house so i thought i'd take him down.


Silas and SMD

So, someone was in my lab looking for batteries and knocked over my SMD passives container.  Luckly, the resistors didn't make it out, but all the 0603 green and yellow LEDs, along with a 3.3v SOT-23 regs were lost.

Sooooooo....guess who learned to use tweezers, how to identify LEDs, and what a "SOWT-TWENIE-DREE" was?

This kid,


Ok, shameless parent brag is over.

Constant reading of an analogue Value. Mechanical sympathy?

Over on my Pet weighing project, i am  using a PIR sensor to detect approach of the "subject". Once the PIR sensor goes high, the sketch takes a "base" value, and then takes the highest reading as its "read" value.

I think the PIR sensor is playing up, or maybe its thestrain gauges bouncing around all over the place....

is there any way to fix wheel with dead spots?

i have printed an omniwheel to use in my robot

problem is, i noticed that during the rotation, the wheel is "floating" for some period, i have marked the problematic region ,

i tried to put isolierband there, but it's not solving the problem in 100%, and the trade-off is the movement of the little wheels.

i noticed that the problem might be the part that cis connected to the shaft.

is there anyway to use this wheel? i want to avoid reprint it.


Qestion about 4WD thumper encoders and T'Rex controller bluetooth module

First of all, I am a newbie to robotics. I purchased the 4WD wild thumper, and have a few questions about it. I noticed that the four motors do not come with encoders with them. I wonder if it is possible to install encoder on it.

.6" DIP and Breadboard

Edit-I found this video today (well Limor did.) http://youtu.be/n5LEEoskiaM Lots of work but he gets it done.

I have a handful of chips I use that fit that .6" DIP category still-The ISD 17xx and now the Parallax chips.  The thing is it kind of sucks putting them on a breadboard-you end up lopsided and don't usually have enough tie points on one side to work with, and most chip designers don't put all the "necessary" connections on one side.  Now there are pictures of a "collector's item" breadboard made for this type of package: