L'électronique de zéro. Bonjour à toutes et à tous !
Si vous êtes ici, même s'il s'agit d'un hasard, c'est qu'il y a une très grande probabilité que vous ayez envie de vous documenter ou d'apprendre l'électronique. Quels sont les principes de base ? Comment connaître les composants et pouvoir les utiliser pour faire des montages ? Comment faire ses propres montages ? Telles sont les questions auxquelles nous vous amèneront des réponses afin de satisfaire vos besoins sur le sujet.
Nous commencerons le cours "en douceur" par les formules et les lois nécessaires et fondamentales à connaitre en électronique. Sachez toutefois que le domaine de l'électronique est tellement vaste que nous ne pouvons pas vous présenter toutes les facettes de cette science. Avis donc à tous les amateurs, les hobbyistes, les professionnels et les étudiants : vous venez de dénicher la perle rare ! ATmega168A Pulse Width Modulation – PWM - Protostack. Dimming an incandescent bulb is easy.
Simply adjust the current down using a potentiometer and you are done. Dimming an LED is another story entirely. When you reduce current through an LED there are unintended consequences like color shifts and dropouts. So You Want to Build Electronics. The equipment you need to get started in building electronics.
If you look back through the last two years of posts on this blog, you'll see my relatively rapid transition from absolute beginner in electronics to someone who is formidable enough to have their work at least noticed (See HaD every other month). This means I've been fielding a lot of questions from beginners online as to how exactly to get started, and what to buy, and what to do with it. And to answer this, I keep having to pull up the same links to the basic stuff. Arduino’s AnalogWrite – Converting PWM to a Voltage. D-A_converter When I first started working with the Arduino platform (it was also my first experience with microcontrollers), I was a little surprised that analogWrite didn’t actually output a voltage, but a PWM (pulse-width modulated) signal.
After all, the ATmega had a A-D (analog to digital) converter along with Arduino’s analogRead. The complementary analogWrite function was there, but no D-A (digital to analog) converter on the AVR chip itself. Fortunately, there is an easy way to convert a PWM signal to an analog voltage. To do so you only need to implement a simple single-pole low pass filter. PWM Primer. ABCelectronique, portail de l'électronique. 10A H-Bridge Motor Controller - Introduction. Motor control is the core heart of robotics.
Without locomotion or any movement a robot is dull and lifeless. The H-bridge is a tried and true concept for DC motor control. Lab 14: Inter-Integrated Circuit (I2C) communication. I2C (Inter-Integrated Circuit) is a short distance serial interface that requires only 2 bus lines for data transfer.
It was invented by Philips in 1980′s, originally to provide easy on-board communications between a CPU and various peripheral chips in a TV set. Today, it is widely used in varieties of embedded systems to connect low speed peripherals (external EEPROMs, digital sensors, LCD drivers, etc) to the main controller. In this experiment, we will cover an overview of I2C protocol, its implementation in PIC microcontrollers, and the method of connecting single and multiple devices on a common I2C bus.
Tutorial 10 for Arduino: Interrupts + Debouncing. Arduino and the AREF pin. Learn how to measure smaller voltages with greater accuracy using your Arduino.
This is chapter twenty-two of our huge Arduino tutorial series. Updated 12/12/2013 In this chapter we’ll look at how you can measure smaller voltages with greater accuracy using the analogue input pins on your Arduino or compatible board in conjunction with the AREF pin. However first we’ll do some revision to get you up to speed. Please read this post entirely before working with AREF the first time.
Arduino Tutorial - A detailed introduction on how to use LEDs. Tutorials. The most fun you can have (after blinking LEDs) is using sensors to detect whats going on in the world and act on that information. However, all sensors have their own methods of interfacing. That can make them a real pain to work with: some need pull-up resistors, some need certain power supplies, some use lots of power, some don't. Since there aren't that many different sensors that people tend to want to use I have collected the most common sensors with code examples and wiring diagrams.
Tutorials include: Force sensitive resistor - Used to detect physical pressure such as pinching, squeezing, pushing, brushing. Photocells - Used to detect light/dark, breakbeams, simple object detection. Fribotte : Base de données technique. LiIon_tut.pdf (Objet application/pdf) B e a . s t. [an error occurred while processing this directive] Magnetic Levitation using Hall effect Sensor Feedback, and Matched resonant wireless power transfer This work was completed initially for a final project for Joe Paradiso's class MAS.836 - Sensor systems for Interactive Environments, taken Spring 2oo5.
Click to watch the following movies:Magnet Levitation Movie [100 megs], or in Small form. Resonant Power Transfer movie [95 megs], or in Small form. Apprendre l'électronique en partant de zéro. Using the I2C Bus. Motors and Microcontrollers 101. Electric motors are a key way of converting electrical power (voltage and current) into mechanical power (torque and speed), and because electric motors are simple and reliable machines, they can be found all over, in many different shapes and sizes.
Just considering a normal (gasoline-powered) car, there are a great number of electric motors: the powerful starter motor and alternatoralternating windshield wiper motorsintermittent-use power windows and door locksthe blower fan that moves hot and cold air into the cabinthe tiny motors inside the CD player And I'm sure you can think of others. But from an electronics perspective, motors are slightly tricky loads to control -- they're not just a resistor! Even for a single applied voltage, their current varies with loading, starting, and stopping, and the energy stored in the magnetic field of the windings means that they are inductive, which can present a danger to other circuit components if it isn't handled properly.
NerdKits - learn electronics with our educational microcontroller kit. DOCTRONICS home. Robotique - Index des projets. Notion de Résistance Électrique et la loi d'Ohm. RadioLocman free electronic diagram circuits components schematics diagram data sheets semiconductors engineering for engineers and amateurs.
Réalisations - Alim. led. Electronique > Réalisations > Alimentations > Alimentation d'une LED Dernière mise à jour : 30/12/2012 Présentation Les lignes qui suivent décrivent comment utiliser une LED de façon isolée ou en groupe, avec des tensions alternatives ou continues.
Pour plus de renseignements concernant ce composant, merci de vous reporter à la page Théorie - LED. Diy › Intro. Les Montages Electroniques. Hobby projects - Simple electronic circuits. Computer microphones Learn how to interface electret and dynamic microphones to the standard computer sound card. Metal detectors Theory of operation and schematics of the most common metal detectors used today: Very Low Frequency (VLF), Pulse Induction (PI) and Beat-Frequency Oscillator (BFO).
Wireless microphone The wireless microphone transmitter can be built in an afternoon with simple, affordable and widely available parts.