Let's Make Robots!

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.

 

 

Thanks 

JVarhol

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.

http://www.openscad.org/

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

difference(){

union(){

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?

Hi,

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

Looking for a custom built inspection robot

Hello to all the community,

I'm looking for a micro TIR (tactical inspection robot) either tracked or wheeled but tall about 1,7 cm , wifi controlled by pc or android tablet and with cctv camera.

Arduino I2C multi-master hardware fault

A couple of my projects recently rely on I2C to connect multiple Arduino compatible controllers. These projects have 3 or more ATmega8A or 328P processors that work as both I2C master and I2C slave.

My ULTRASONIC (HC SR04) sensor is giving large negative values

I bought it and it was workin gfine with the code and after inserting  it in my project , when i checked it shows large negative values, I tired changing pins , but it doesnt work shows values like 3315,3325 random numbers 

I dont know whether there is a problem with my sensor or my code is wrong. Really worried please help guys.

 


CODE

 

#define trigpin 3

#define echopin 2

void setup()

{

  Serial.begin(9600);

Need putting on the right path

Hello all, First post so.... nice ta meet cha.

im fairly new to robotics iv built a couple of things in the past but have stuck with primarily mechanical robotics (not sure if thats the right term) rather than ones which require any processor other than my own brain. in all honesty im not even sure if they classify as robots.

Need putting on the right path

Hello all, First post so.... nice ta meet cha.

im fairly new to robotics iv built a couple of things in the past but have stuck with primarily mechanical robotics (not sure if thats the right term) rather than ones which require any processor other than my own brain. in all honesty im not even sure if they classify as robots.

ICStation Stock Clearance, Up to 50% Off

ICStation picked 20 items with the best price for all hobbyist now.

Check the details at: http://www.icstation.com/newsletter/eMarketing/ICS_clearance_2nd.html

Is my design stable?

I made a design for a robot in sketchup. I made it like something that is two wheeled and without any castor wheel.

Wanted something like this : http://www.pololu.com/product/189

I have a little concept on mechanics so don't know weather the design will be stable or not. Any suggestions on making it any better?

 

About HC-05

i got two hc-05 to control my robot with 

but i cant realy seem to be able to connect the arduino with it!

i wrote a simple code about getting the chars i type on the computer to send it to the arduino and from the arduino to the module and then gets the respone back from the module to the computer

but i tried many times to connect it with it and it didnt seem to workout

the rx of the module is 3.3 level so i made a voltage divider with 3 10k R but how many times i try it doesnt work

Which MOSFET to use for battery voltage measurement?

Hello all,

I'm currently building a buoy with a string of sensors that measures temperatures at different dephts. I'll be making a blog or Something Else later.

The thing is, I want to measure the voltage of the battery (Li-Po) to be able to predict when it needs to be charged since the system will operate "out-there-in-the-middle-of-nowhere".

Raspberry Pi Camera (How To: Stream)

Hello There LMR. I bought a raspberry pi camera and i make some test with it to see if it work and it works fine . Now i have a question how can i stream with it on the net or localy (what is more easy) and what programs i have to install on my raspberry. I also check on the net but i can't find all the info i need. If someone know please tell me!

Programing for begginers

Hi All,

        Over the last few months I have finished building the Rover Explorer, I used the sample program from Oddbot, and have sorted out some of the misstakes I made wiring it all up.