hi I'm designing a simple animal frightener for class. It makes ultrasonic sounds (10kHz - 40kHz) to scare different animalsl. What do you think about the circuit, could it work?

Can you Please teach me How to make a controlled Arduino Robot via Bluetooth by using an Android Device :D 

 

I found some Application in Play Store about the Bluetooth controller, it is called Bluebots ,a Bluetooth remote control for robot. (see below)

https://play.google.com/store/apps/details?id=blue.bots.free.matt&feature=search_result#?t=W251bGwsMSwxLDEsImJsdWUuYm90cy5mcmVlLm1hdHQiXQ..

We don't need nations, we need thinkers. While I love my country, it occurs to me that I love being a part of this community more. I am not, in my mind, an American when I take part in LMR-I am a citizen of the world of Geeks: Nerdistan, if you like.

I wanted to ask if we can use a digicam with OpenCV to give our robots vision. I have a Canon Power Shot A-470 7 MP digital camara and a few others which record images the old photo film way. Can any of these be used with OpenCV to give my robot perception of objects and colors? I don't want to open my digicam and explore inside though as I want to use it for other purposes as well. If not, then can a cheap unbranded webcam be used for this purpose? Please reply...

Looks like this---

The servo motor is attacked to digital pins.  How do they recornize the 75 and 225 comands? I thought digital pins could only take high and low comands?

Soooooo, I got my new FEZ Panda II and I thought I might like it. I was right, I really do!

Basically, this Arduino sized board (compatible with some Arduino shields) is like the "FEZ Mini" on steroids! One of the many great things this board has is almost all the processor pins broken out to connectors that accept wires or shield pins. Other great items are a Micro-SD drive and a realtime clock. I did a firmware update without a problem. FEZ Mini programs are running just fine with an update to Panda II libraries.

I have some full size "normal" servos that work perfectly well on 5 Volt systems (like the Arduino).

On a 3.3 Volt system (5V servo power) the same servos can work, some do not do much but "shake" through their entire range or in some cases the servo won't do anything at all. I have gotten totally different reactions from 2 serrvos from the same company!!!! (There are very few that function normally,)

I have a fairly simple (3 parts and a transistor) high speed "booster" circuit that I might try on the control inputs (it would be one circuit per servo used). What a pain....

I like this Cali Lewis lady.

http://www.youtube.com/watch?feature=player_embedded&v=yTHVR4Zh6yg

I make another off topic forum to ask you this-

Does anyone know if there is an LMR Community Group on skype?

If yes then please tell me about it.

If no, then I want to start one but want permission to do so. The main action remains here in LMR and on the shout box but we can go a step further and increase our limits. Skype can be a way to know others both face to face or through voice and text.

If there isn't a group on Skype, can you guys post your views here on this topic?

What would be great is to reserve a topic so everyone can put their favorite websites to share (LMR being first, of course!)

I have found an AWESOME website with lots of C# stuff and links to other great websites.

Everyone check out: http://www.csharptools.com/ you owe it to yourself!

hallo.

I have googled a little around and found they sabertooth controllers.

i need 20A on each motor in my projekt and have 4 motors.

Should i choice 2 of this:
http://www.dimensionengineering.com/products/sabertooth2x25 

or 1 of this and put 2 motors on eatch output:
http://www.dimensionengineering.com/products/sabertooth2x50hv

Hi everybody. I have to make my last project for class in two weeks and I'm trying to make a simple robot. It's a little car that has some proximity sensor. I'm using a TSOP 1736 sensor and a TSAL6200 IR emitter. For the first one I have made the circuit that comes with the datasheet. And for the emitter I used a 555 in astable mode with a 2N2222 transistor

Saw this IMU Sensor on Ebay for pretty cheap. Has anybody used it before? Worth $33 USD?

Description:

Some of you might have noticed Will Fleischer’s enthusiasm for the FEZ mini :-)

I see that it’s on sale for $20,- and I think that it’s a great offer for anyone looking to starting out in C# microcontroller programming.
http://www.ghielectronics.com/catalog/product/134

Here's the deal, I'm building my first robot & I have an Arduino One board, but I've realized that the board is too pretty for me to use up in my current (and first) project and besides it would be a waste.

My first thought was:

Well, maybe I can pull out the ATmel chip on the board and stick a blank one there, upload the desired code there, take it out and follow some breaduino tutorial to build around it.

Peeked here

http://arduino.cc/en/Tutorial/ArduinoToBreadboard

and...

Hi LMR,

As you might seen on the first page a new CP is going to happen in Berlin on 21-26 August in an airport :D 

I'd like to go, last time I got invited but even without an invitation the trip would be somewhere around 400 Euros including the airplane ticket, and if it will be like the last time it will be worth going. 

Frits can you post some more info on this when you get some time/more inside info?

Cheers!

Over the past few weeks i've been building a robot using the .Net Gadgeteer platform and blogging about it.

The robot is based on a Rover 5 Chassis, with an ir compound eye and pan and tilt kit for object tracking.

I didn't find too much information on this site about how to use these awesome dagu products with the .net gadgeteer platform so hopefully my experiences can help to make things a bit easier for someone else.

Hi

I am intrested in making a car that can be controlled anywhere through wifi. I do no know where to start and how to do it. Does anyone know what to use (arduino? arduino with ethernet shield? arduino with wifi shield?) or any good step by step instrunctions on this?

Anything would help

Thanks

Well, I'm trying to learn servos so I'm toying around a micro servo 9G.

I'm using an arduino one board and the following code:

 

#include <Servo.h>

Servo neckServo;            // Define the Servo object

void setup()

{  

  neckServo.attach(10);     // attach the servo on pin 10 to the servo object 

  neckServo.write(90);       // "favorite" default position

}  

 

void loop()

{

neckServo.write(0);

Does anybody have any experience with, or any good references on reconstructing a 3d scene from a stero image, or lots of images from different positions?

My use case is obviously a robot (MmBot) which has a stereo camera mounted on the front. I don't want to use a proper depth camera, as they are intrusive so I couldn't have multiple robots in the same room all seeing at once.

This is MmBot with the stereo cameras on the left, and the image she sends to the pc on the right.