Théorie - Triac Electronique > Théorie > Triac Dernière mise à jour : 16/03/2014 Présentation Le triac est également appelé Thyristor bidirectionnel ou Redresseur contrôlé. Un triac est, contrairement au thyristor, un composant bidirectionnel, qui peut laisser passer le courant dans les deux sens. On peut dire que le triac est l'équivalent de deux thyristors montés tête-bêche. Notation (appellation) du composant La notation par lettres et chiffres du composant repose sur une normalisation dont quelques détails sont donnés à la page Notation des composants. Usage principal du Triac Si les jeux de lumières vous attirent, ce qui est très certainement le cas, vous avez sans doute déjà vu un triac dans un schéma électronique. Déclenchement du triac Le déclenchement du triac s'effectue au travers de la connection de commande appelée Gachette (G). Sachant cela, il reste à connaitre les points suivants pour comprendre comment un triac peut être amorcé. Quelques exemples de sensibilité de triacs Remarques Danger !
Système canadien de référence spatiale - Calcul inverse géodésique Démonstration en ligne News: CGVD2013 is now available! Natural Resources Canada has released the Canadian Geodetic Vertical Datum of 2013 (CGVD2013), which is now the new reference standard for heights across Canada. This new height reference system is replacing the Canadian Geodetic Vertical Datum of 1928 (CGVD28), which was adopted officially by an Order in Council in 1935. Read more Geodetic reference systems stem from the need to provide a consistent and integrated reference surface for data analysis. This site provides end-users with the geodetic data and tools they need for a range of commercial and private uses. Date modified:
ABCelectronique, portail de l'électronique GROVE System Grove is a modular, ready-to-use tool set. Much like Lego, it takes a building block approach to assembling electronics. Compared with the traditional, complicated learning method of using a breadboard and various electronic components to assemble a project, Grove simplifies and condenses the learning process significantly. The Grove system consists of a base shield and various modules with standardized connectors. Grove Modules A wide range of Grove modules are available for use within the Grove System. Environmental Monitoring Have you ever wanted to get your daily weather report based on data from your garden instead of obtaining a more generic report from your TV or mobile phone? Motion Sensing Sensors in this category enable your microcontroller to detect motion, location and direction. Wireless Communication Communicating without wires is a cool feature that can spice up your project. User Interface Physical Monitoring Scientists understand the world around us in physical dimensions.
Weller Magnastat Autopsy and Repair » Code and Life Immediately after soldering together my USB password thingy, my solder iron, the family heirloom Weller Magnastat stopped working. Some investigation showed that the base station was providing 24V AC voltage just fine, so I decided to unassemble the handpiece to see if something could be done. Here’s what I found: It turned out my iron was salvageable; read on to learn a bit about the Magnastat and how I was able to repair mine. Magnastat basics The construction of the device is surprisingly simple (see this image): The first (blue) wire from A/C power unit goes straight to the heating element (first red wire with black tube around it). A long tube goes “out” the handle part into the iron tip, and the tip is placed at the head. Note that in my model the tip and the magnastat are one solid piece (magnastat is in the base of the tip), newer models have a separate magnastat and tip, and you can change the target temperature just by changing the magnastat part. Reviving the old Weller
Electronique Innovante » Arduino Un “shield” pour la découverte de LabVIEW et LIFA Dans cet article, vous allez découvrir un “shield” utilisé en section de BTS IRIS pour aborder les fondamentaux de LabVIEW. Pourquoi réaliser un shield “maison” avec un arduino UNO plutôt que du matériel d’acquisition National Instrument ? le coût d’une carte Arduino est faible (20€), une documentation abondante existe sur Internetil n’y a pas de programmation à faire coté Arduino : le “firmware” est fourni par NI puis programmé dans la mémoire flash du microcontroleur de l’arduinole coût d’un “shield” maison reste raisonnable et permet d’avoir exactement ce que l’on souhaite comme capteurs, E/S…La programmation de cette carte avec LabVIEW suit les “grands classiques” : ouverture d’un bus de communication, configuration des entrées/sorties, lecture des entrées, traitement numérique, pilotage des sorties, fermeture du bus de communicationChaque étudiant travaille sur “sa” carte à son rythme ! Lire la suite… Aduino et LIFA (épisode 2)
How to Make a Negative Ion air ionizer AdWords We use AdWords to deploy digital advertising on sites supported by AdWords. Ads are based on both AdWords data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that AdWords has collected from you. LiveRamp We use LiveRamp to deploy digital advertising on sites supported by LiveRamp. Doubleclick We use Doubleclick to deploy digital advertising on sites supported by Doubleclick. RocketFuel We use RocketFuel to deploy digital advertising on sites supported by RocketFuel. Twitter We use Twitter to deploy digital advertising on sites supported by Twitter. Facebook We use Facebook to deploy digital advertising on sites supported by Facebook. Sprinklr We use Sprinklr to deploy digital advertising on sites supported by Sprinklr. Dstllery Marin LinkedIn Demandbase Yandex AdForm Baidu Naver
List of single-board computers One of the first 10 MMD-1s, a prototype unit, produced by E&L Instruments in 1976. The "dyna-micro"/"MMD-1" was the world's first true single board computer.[citation needed] The MMD-1 had all components on a single printed circuit board, including memory, I/O, user input device, and a display. List of single-board computers – computers built on a single circuit board, with microprocessor(s), memory, input/output (I/O) and other features required of a functional computer. ARM based[edit] Other board[edit] ARM9, ARM11[edit] Cortex-M3[edit] Cortex-M4[edit] MYD-LPC435X EVM for NXP LPC4350/4357 ARM Cortex-M3 microcontrollers designed by MYIR Freescale i.MX[edit] OMAP[edit] DragonBoard – Snapdragon-based development kitsIFC6410 – Snapdragon 600 APQ8064 (from Inforce Computing)bStem – Snapdragon S4 Pro APQ8060AB (from Brain Corporation) Rabbit/Z80[edit] Rabbit SBC Signetics 2650[edit] KT-9500 Evaluation board - Signetics 2650 CPU @ 1MHz, 512B of static RAM, ROM monitor and proto area. Xilinx Zynq[edit]
Page perso de M. LLIBRE What Is OpenWrt And Why Should I Use It For My Router? So, what is OpenWrt? OpenWrt is a Linux distribution for your router. Like other Linux distributions, it offers a built-in package manager that allows you to install packages from a software repository. It can be used for anything that an embedded Linux system can be used for, including functioning as an SSH server, VPN, traffic-shaping system, or even a BitTorrent client. OpenWrt isn’t the ideal solution for everyone’s needs. Like DD-WRT, OpenWrt is Linux-based and may be more stable than the firmwares some routers include, which can struggle when handling large numbers of connections. Uses for OpenWrt If the idea of having a modular Linux distribution available on your router doesn’t excite you with all the possibilities, you may be reading the wrong article. Use the SSH Server for SSH Tunneling: OpenWrt includes an SSH server so you can access its terminal. This isn’t a complete list, not by a long shot – but it should get you started thinking about what’s possible with OpenWrt.
Temporisateurs Electronique > Bases > Temporisateurs Dernière mise à jour : 29/09/2013 Présentation Un temporisateur est un circuit électronique qui permet de mettre en route un système pendant un certain temps, ou qui permet de le mettre en route au bout d'un certain temps. Les applications d'un temporisateur sont multiples et variées, et on peut aussi bien avoir besoin d'activer un circuit pendant quelques secondes que pendant quelques heures voir plusieurs jours. Un temporisateur peut être construit à partir d'un simple monostable, mais nous verrons qu'il existe d'autres solutions, un peu moins simples mais qui permettent d'obtenir des durées de temporisation très longues. Utilisations (exemples) Le temporisateur est un circuit très utilisé. Caractéristiques principales On peut faire un rapprochement assez serré entre monostable et temporisateur, même si la finalité n'est pas forcement exactement la même. Impulsion de déclenchement (ou impulsion d'entrée) Polarité de l'impulsion de déclenchement
Elbert - Spartan 3A FPGA Development Board In Stock and Ready To Ship Within 24 Hours ELBERT is a simple but versatile FPGA Learning/Development board featuring Xilinx Spartan 3A FPGA. An excellent choice for beginners and advance learners for experimenting and learning system design with FPGAs. This development board features Xilinx XC3S50A 100 pin FPGA with maximum 68 user IOs (Some are dedicated for system). USB2 interface provides fast and easy configuration download to the on board SPI flash. You don’t need a programmer or special downloader cable to download bit stream to Elbert. Files USB Driver User Constraints File Configuration Downloader Documentation Elbert - Spartan 3A FPGA Development Board User Guide Learning FPGA and Verilog A Beginner's Guide Mount Elbert