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1  International / Français / Re: PPE machine poseuse de dominos on: February 15, 2011, 05:27:24 pm
Salut,

Si je peux t'aider, je pense que ce serais mieux d'avoir un Arduino Mini PRO. Il est plus petit, plus léger et vous pourrez souder directement au board vos connexions.
Pour la direction du petit véhicule, j'ai déjà eu celui que tu montre en photo(!!). Il arrive à tourner avec un petit mécanisme qui est actionné par la rotation d'une forme (comme un cercle) insérée par l'utilisateur. Ce mécanisme pourrait peut-être être controlé par un seul servo.

Pour les senseurs, regarde ceci: http://www.seeedstudio.com/depot/electronic-brick-%C3%82%E2%80%93-line-finder-p-680.html?cPath=144_149

Si ça peut t'aider, voici le lien vers les tutoriels de mon blog. J'ai récemment commencé à les écrire par contre, du contenu va se rajouter. Je peux aussi écrire sur un sujet en particulier si tu me le demande.
www.binette228.wordpress.com/tutoriels

Bonne chance dans ton projet et garde nous informé!
2  Topics / Robotics / Re: The doughnut will show you to your room on: February 15, 2011, 04:02:42 pm
Awesome!
Makes me want to make one...
3  Using Arduino / Microcontrollers / Re: Atmega32L Arduino Bootloader installed! And working arduino sketch!!! *WHEW!* on: February 15, 2011, 03:55:45 pm
Good job! smiley
4  Using Arduino / General Electronics / Re: help on how to use 9 sevo motors with uno on: February 15, 2011, 03:50:02 pm
Hi,

Can you give us the datasheet of your servos?

Good luck with your project and keep us informed of any need of advancement!
5  Using Arduino / Project Guidance / Re: Arduino Quadcopter on: February 06, 2011, 08:50:58 pm
Hi,

Yeah it is a very ambitious project and it will cost as much!
But remember that the Arduino cannot process video...

But anyway, you should go look here: www.diydrones.com/
A lot of people there did what you want to do.

I wish you luck and wish you'll realise this!
(Don't forget to post here what you made if you do it!)  smiley
6  Using Arduino / General Electronics / Re: Name that component! on: February 06, 2011, 08:29:33 pm
Hi,

The LM324N is a QUAD Operationnal Amplifier http://www.national.com/mpf/LM/LM324.html#Overview
The LM358 is a dual Operationnal Amplifier http://www.national.com/mpf/LM/LM358.html#Overview,
An Op-Amp can be used as a voltage comparator, for active filters, to be used as a oscillator...

The LM339 is a QUAD voltage comparator http://www.national.com/mpf/LM/LM339.html#Overview

The 74HC20N is a NANDGATE I think, google what this is!

So I won't google you every part :p

But if you read the datasheets of your pieces you can google what they are and get information about their application.

Just to give you an int, a shift register can use 2 pins to get you 8/16 outputs,
Gates, like OR/AND gates are... gates, which open when the right conditions are respected!
Op-Amp are amplifiers which can be used for a wide range of application, from audio to logic.

Good luck reading and googling! I wish I helped you a bit...
If you are not sure about specific use of a type of part ask and I'll try to answer you.

Take a look here: http://tronixstuff.wordpress.com/2010/10/20/tutorial-arduino-and-the-i2c-bus/
There is tutorials about shift registers, and more.
7  International / Français / Re: SRF01 on: February 06, 2011, 08:04:46 pm
Salut,

Je ne mis connais pas en affichage LCD, mais tu dit que tu n'arrive pas à faire communiquer l'Arduino avec ton ordinateur avec Serial.print n'est-ce pas?
Est-ce que tu peux y arriver avec un code simple? (Essaie avec un exemple)
Si ce n'est pas possible, c'est que tu as peut être un problème de réglage ou un problème avec ton Arduino.

Bonne chance!
8  International / Français / Re: debutant : branchement sur plaque de prototypage on: February 06, 2011, 12:59:15 am
Salut,

Si ça peut t'aider, j'ai fait commencé à faire quelques petits tutoriels dont un sur la DEL et la loi d'ohm.
C'est encore en développement par contre. Ces tutoriels ne sont pas accessibles depuis la page d'accueil.

http://binette228.wordpress.com/tutoriels/

Alors si vous avez des commentaires c'est très apprécié! Toute cette section n'est pas finalisée et je souhaite l'améliorer.
9  International / Français / Re: Projet Lavomatic Box on: February 05, 2011, 11:38:56 pm
Mais il ne faut pas oublier que l'ampérage doit être assez élevé pour alimenter tout un tas de laveuses/sécheuses!
Si les laveuses/sécheuses sont groupées ensemble par petit nombre, le nombre d'interrupteur augmente et la complexité aussi.
Assure toi que le système soit fiable et sécuritaire. Ne laisse pas n'importe qui le designer.

Montre nous comment le système est conçu quand il sera fonctionnel!
10  Using Arduino / Motors, Mechanics, and Power / Re: Motor Shield v1 on: February 05, 2011, 07:03:39 pm
Hi,

What is the motor shield V.1 ? Can you give us a link to the motor driver manual?
Are you having trouble with the code and/or you don't know if it can drive two motors?
11  Using Arduino / General Electronics / Re: Arduino + MotorShield L298N + 4 Ping sensor Power question ! on: January 27, 2011, 10:15:22 pm
So first of all, the power jumper on the arduino shield.

If you want to power the motor shield from the Jack on the arduino, set the Jumper to Vin.
If you want to power the motor shield with the power inputs on the shield, set the Jumper to PWRin.
In either cases, you need to power your Arduino from USB and/or the DC Jack.

Second, the best would be to power your arduino from an other power source than your motor shield.
That's because if you draw too much current from a battery, a voltage drop can occur. So if your Arduino is connected to this battery, it COULD crash!
There is also current problems. If you draw to much current with the motor shield, the battery could not be able to supply the Arduino at the same time, causing it to crash.
And I want my arduino to stay powered when the motor's batteries are dead!

Ask if you have more questions!
12  Using Arduino / Motors, Mechanics, and Power / Re: Could use help on motor ideas on: January 27, 2011, 07:25:37 pm
Hi,

You should first make a plan of what you want to do.
What is the weight you want your dolly to support? what will me the size, do you want it to be on a rail or on wheels?

Don't forget that motors induce vibrations, stepper motors even more.
Do you want to use the audio coming from the camera microphone?

You have to do yourself the design of your dolly, only you knows how you want it to be.

Brainstorm and come back!

Good work!
13  Topics / Science and Measurement / Re: Weather Station on: January 26, 2011, 06:00:10 pm
Nice work!

Do you have a Blog?
14  Using Arduino / Motors, Mechanics, and Power / Re: Motorshield? on: January 26, 2011, 05:51:54 pm
Hi,

This is the one I first bought. I'ts really easy to use, can drive 2 AMPs and is low-cost.
http://www.robotshop.ca/controleur-moteur-2a-arduino-dfrobot.html

If you want to make your own motor driver/controller, you could use the L298. It is used for a lot of hobby motor driver so you won't have trouble getting help or finding lot of other designs. (what I showed you use it).

Good luck!
15  Using Arduino / General Electronics / Re: Arduino + MotorShield L298N + 4 Ping sensor Power question ! on: January 26, 2011, 05:39:49 pm
Hi,

1.
Quote
I need to power the arduino uno AND the motorshiel ? or just one of them is enough?
When you connect the motor shield to the Arduino and set it's power to Vin (with the jumpers), it takes the power from the DC jack on your arduino, through a diode and then powers the motor shield. So you have to be careful with this. I haven't check what is the diode current rating or what the traces on the board allows but if the motor shield takes 2 AMPs it may be problematical. The manual of the motor shield says it is strongly recommended to use an external power source to power the board.

   What you should do:
   1. Read the manual carefully
   2. You should probably use an external power source for the motor shield (directly connect your battery to the motor shield).
   3. Check if your 9V battery can supply enough current to power everything. Even if it can supply let's say 2000 mAH it may not be able to supply 2000 mA at one           time.

2. What is PWM?
Well, PWM is Pulse-Width-Modulation. If you program the Arduino to OUTPUT a square Wave with analogWrite, the Arduino will OUTPUT a square wave (a square wave is the voltage of a pin going from HIGH to LOW VERY fast(Google It))!
But this square wave needs to know for how much time it will be at 5v during one cycle. This is the PWM.

So let's say I want an LED to be at exactly 50% of it's brightness, I can lower the current passing through it, or can can make the LED go ON and OFF very quickly, so you can't see it. I'll make it be ON 50% of the time, and OFF the other 50%.
What will be the brightness of the LED? 50%.
If I want it at 25% brightness, I'll make it on for 25% of the time.
On the arduino you are using 8 bit so 255 = 100%, 128 = 50%, 64 = 25%, etc.

It's the same thing on a motor!
If I want it to be full speed, I will supply the motor with a constant voltage.
If I want it to be 50% of it's speed, I'll supply it with a voltage going from HIGH to LOW, HIGH 50% of the time.

Still not clear? Take a look at this:
http://tronixstuff.wordpress.com/2010/04/10/getting-started-with-arduino-chapter-one/
http://arduino.cc/en/Tutorial/PWM
http://arduino.cc/en/Reference/AnalogWrite

And don't forget that Google is your friend!
Good luck!
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