50 alternatives pour remplacer tous les produits Google Source : linuxmanua.wordpress.com Google, c’était bien avant. C’est maintenant devenu un cancer. L’entreprise Google est devenue la plus puissante agence de renseignements qui n’ait jamais existé dans l’histoire de l’humanité. Google sait tout de vous : vos correspondances (Gmail) vos amis, vos centres d’intérêt et vos opinions (Google +, Google Reader) vos contacts (Google Contacts) vos recherches sur internet (Google Search) vos documents (Google Docs, Drive) votre navigation internet (Chrome) votre domicile (Street View) vos coordonnées bancaires (Google Play) vos photos (Picassa) votre n° de téléphone (Récupération de compte Google) vos trajets et votre localisation (Latitude, Google Map) votre agenda (Google Agenda) vos vidéos et vos musiques (Youtube, Google Music) votre Blog (Blogger) vos données de votre téléphone portable (Apps Androïd) et bientôt votre vie IRL (Google Glasses) etc … Or Google est une entreprise malfaisante et criminelle qui : Gmail : K9Mail
LED et calcul de la résistance série Comment calculer la résistance série pour une LED ou un ensemble de LED en fonction de la tension d'alimentation ? Cet article présente les calculs nécessaires. La plupart du temps, on ne peut pas brancher directement une LED sur une source de tension (pile, adaptateur, etc). Caractéristiques électriques d'une LED Une LED fonctionne en courant et tension continus. Diverses couleurs de LED LED rouge, orange, jaune (ambre) : 1.8V à 2VLED verte standard (vert clair) : 1.8V à 2.2V Caractéristique typique pour une LED rouge, une LED verte et une LED bleue La tension aux bornes de la LED rouge ne varie que de 1,55V à 1,93V quand on fait varier le courant de 1mA à 20mA. En passant de seulement 1,93V à 2,20V, le courant dans la LED est multiplié par 2 ! Pourquoi une résistance série avec la LED La résistance série est justement là pour éviter ce phénomène fâcheux ! Résistance série avec la LED Mais comment calculer cette résistance ? Calcul de la résistance série pour la LED
Easy Arduino: Two Projects To Help You Get Started Meet Arduino, the tiny microcontroller that’s good at doing what your computer can’t. The computers we use every day are powerful, but they’re terrible at knowing what’s going on around them. Your laptop isn’t exactly equipped to sense light or moisture, for example. Arduino, on the other hand, is specifically designed to stay keyed in to the outside world. The Arduino was developed by Massimo Banzi and his cofounders out of Ivrea, Italy, who named the device after his favorite bar. Regardless of which Arduino model you buy, the utility of the microcontroller comes out when you use it for “Internet Of Things” projects—whether you want to connect to the real world, the cloud, or both, Arduino makes it easy. Getting Started With Arduino Before we can fully understand what Arduino is, it’s important to realize what it isn’t. So in order to work with Arduino, you can’t just buy the microcontroller and be done with it. Hardware Arduino Uno. Software Arduino Hardware Sketch: Blink An LED
FTDI Chip Future Technology Devices International, commonly known by its abbreviation, FTDI, is a Scottish privately held semiconductor device company, specializing in Universal Serial Bus (USB) technology. It develops, manufactures, and supports devices and their related software drivers for converting RS-232 or TTL serial transmissions to USB signals, in order to allow support for legacy devices with modern computers. FTDI provides application-specific integrated circuit (ASIC) design services. They also provide consultancy services for product design, specifically in the realm of electronic devices. The company's flagship product is its FTDI Chip, an integrated circuit which is a common component on electronic devices using microcontrollers, such as the Arduino physical computing platform (up to before Arduino Uno). FTDI's headquarters are in Glasgow, Scotland, United Kingdom, while it also has offices in Taipei, Taiwan and Portland, Oregon. History[edit] External links[edit] Official website
Cette application résout vos problèmes de maths en un clin d'œil RAPIDE. Voila une nouvelle qui va ravir tous les collégiens. Moins leurs parents. PAS À PAS. Mais cette application, disponible uniquement sur iOS et Windows Phone pour le moment, est bien plus qu'un outil de triche. Un défaut et une limite Elle souffre toutefois d'un défaut : sa reconnaissance de caractère ne lui permet pas de lire les formules écrites à la main. RACINES. L'autre limitation est que l'application ne sait traiter que des équations relativement simples. Arduino Projects - The Big List of 100+ Arduino Projects In this article, we compile all the best and interesting projects we have developed using Arduino. These days arduino projects are used for academic course fulfillment as well. In any case, Arduino is a very interesting platform to build real world projects. List of Arduino Projects Gas Leakage Detector with GSM Module for SMS Alert and Sound Alarm A very interesting arduino project using MQ5 gas sensor and GSM Module. Detect the presence of LPG or other types of gases like CH4, Butane etc with help of MQ5 gas sensor and Arduino. The program in this project also checks for shutdown process – that is – if the gas leak problem has been addressed and eliminated properly. PIR Sensor Burglar Alarm with SMS Alert and Sound Alarm using Arduino A very power burglar alarm or intruder alarm system using PIR Sensor and Arduino – with SMS Alert (using GSM Module) and Sound Alarm. Objectives of this project is as described below:- 1. 2. 3. 4. 5. 6. 7. 8. For Beginners Advanced Topics Books to Learn Arduino
Through-hole technology Through-hole (leaded) resistors History[edit] Through-hole devices mounted on the circuit board of a mid-1980s home computer. Axial-lead devices are at upper left, while blue radial-lead capacitors are at upper right Axial vs. radial leads[edit] Components with wire leads are generally used on through-hole boards. Radial leads project more or less in parallel from the same surface or aspect of a component package, rather than from opposite ends of the package. When needed, an axial component can be effectively converted into a radial component, by bending one of its leads into a "U" shape so that it ends up close to and parallel with the other lead.[4] Extra insulation with spaghetti tubing may be used to prevent shorting out on nearby components. Characteristics[edit] A box of drill bits used for making holes in printed circuit boards. See also[edit] References[edit] Jump up ^ Electronic Packaging:Solder Mounting Technlogies in K.H. External links[edit]
Tutoriel Pearltrees Tutoriel Pearltrees 3. Se créer un profil et l'alimenter (1) ● Allez sur ● Créez votre compte, soit à partir d'une adresse mail valide, soit via les médias sociaux : Facebook, Twitter ou Google. ● Attention au choix de votre identité numérique : mail et avatar ! 4. 5. 6. 7. 8. 9. 10. 11. 12. 10 Simple Arduino Projects For Beginners with Code Awesome!!, Now its very easy to do projects at home. We have selected few DIY arduino projects for beginners, we have explained everything in specific project page along with code. Lets see which are the first top 10 projects.. Feel free to leave a comment if you have any questions. Arduino Solar Tracker Description: Sun tracking solar panels can absorb more energy from the Sun than fixed panels. Read more Arduino 4-Digit 7-Segment LED Display Description: 7 Segment displays are one of the most commonly used displays. Read more How To Make A Tilt Sensor With Arduino? Description: Tilt sensor is used in many applications like aircrafts to measure the tilt angle of the object. Read more Home Security Alarm System Using Arduino Description: Different technologies are used in residential security systems. Read more Rotary Encoder With Arduino Description: Rotary encoders are used in radio equipment like armature radio and hand held radios to tune the channel frequencies. Read more Arduino Alarm Clock
Pulse-width modulation An example of PWM in an AC motor drive: the phase-to-phase voltage (blue) is modulated as a series of pulses that results in a sine-like flux density waveform (red) in the magnetic circuit of the motor. The smoothness of the resultant waveform can be controlled by the width and number of modulated impulses (per given cycle) Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique that conforms the width of the pulse, formally the pulse duration, based on modulator signal information. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast pace. The main advantage of PWM is that power loss in the switching devices is very low. History[edit] Principle[edit] and D.