Rpi Software Back to the Hub. Software & Distributions: Software - an overview. Distributions - operating systems and development environments for the Raspberry Pi. Kernel Compilation - advice on compiling a kernel. Performance - measures of the Raspberry Pi's performance. Programming - programming languages that might be used on the Raspberry Pi. Overview If you just want a working system, all that is required is a correctly formatted SD card. In order to understand the software components in the RPi, you should first understand how it boots up. The boot order and components are as follows: First stage bootloader - This is used to mount the FAT32 boot partition on the SD card so that the second stage bootloader can be accessed. Prior to 19th October 2012, there was previously also a third stage bootloader (loader.bin) but this is no longer required. [1] Raspbian Linux image (others?) Because of this boot process, use of an SD card to boot the RPi is mandatory. GPU bootloaders Distributions Kernel Compiler
Graphique Conso Electrique Téléinfo EDF avec Highcharts (v2) | Blog de Anthony PENHARD Bonjour, Suite à l’engouement de mon premier post Graphique Conso Electrique Téléinfo EDF avec Highcharts et des demandes dans les commentaires je me suis décidé à reprendre le code pour le rendre déjà plus lisibles mais aussi un peu plus « propre » et structuré … Pour rappel le code initial étant de Domos vesta.homelinux.free.fr section « Demodulateur Teleinformation EDF » j’ai donc pris quelques heures pour « refondre », j’y ai également ajouté quelques nouvelles « fonctions » et utilisé Highstock nouveau « composant de la bibliothèque JavaScript Highcharts. vous remarquerez les 2 « lignes » minimum et maximum que j’ai également ajoutées Avec un zoom sur les 3 dernières heures soit en cliquant sur le boutton « zoom 3h » soit avec la souris en jouant sur le graphique du bas pour que cela soit plus accessible j’ai également ajouter des BP pour générer le graphique plus facilement a la période souhaitée il est toujours possible d’appeler la page avec en « paramètre » la période voulue
Getting GPS to work on a Raspberry PI « Peter Mount's Blog One of the tasks I want to use a Raspberry PI for is to take over the duties of an existing ITX based linux box running my weather station. Now in theory that should be pretty simple as the current setup uses pywws to connect to the station and as that’s written in python it should work. Now the Raspberry PI has no onboard Real time clock – which means it needs to use an NTP server to get the time when it starts. As the other projects I have lined up for it is to connect my Meade LX200GPS telescope to the local network or to work with my (in prototype) radio telescopes so having an accurate clock is going to be required. Now the obvious solution here is to use GPS as a time source. So this article shows how to use A GPS receiver with the Rasperry PI – although these instructions are not specific to the PI. The hardware For this experiment I’m using a USB GPS receiver from Maplin – product code A73KF. Raspberry PI with the A73KF GPS receiver plugged in Plug it in and run lsusb Like this:
Low-level peripherals - Rasberry Pi | eLinux.org Back to the Hub Hardware & Peripherals: Hardware - detailed information about the Raspberry Pi boards. Hardware History - guide to the Raspberry Pi models. Low-level Peripherals - using the GPIO and other connectors. Expansion Boards - GPIO plug-in boards providing additional functionality. Screens - attaching a screen to the Raspberry Pi. Cases - lots of nice cases to protect the Raspberry Pi. Other Peripherals - all sorts of peripherals used with the Raspberry Pi. Introduction In addition to the familiar USB, Ethernet and HDMI ports, the Raspberry Pi offers the ability to connect directly to a variety of electronic devices. Digital outputs: turn lights, motors, or other devices on or off Digital inputs: read an on or off state from a button, switch, or other sensor Communication with chips or modules using low-level protocols: SPI, I²C, or serial UART Connections are made using GPIO ("General Purpose Input/Output") pins. Note that no analogue input or output is available. Links Useful P2 pins:
La réalité augmentée du bout des doigts Par Hubert Guillaud le 09/02/09 | 9 commentaires | 14,127 lectures | Impression Pattie Maes, directrice du Groupe des interfaces fluides au Massachusetts Institute of Technology (MIT), a fait sensation à la conférence TED (celle qui ne sélectionne que les “idées qui valent d’être diffusées”), la semaine dernière. Elle y a présenté “Sixième sens” (Sixth Sense), un concept d’interface miniaturisée qui permet d’interagir avec l’internet sans plus avoir besoin d’écrans, développé notamment par l’un de ses étudiants, Pranav Mistry. Sixième Sense est composé d’une webcam qui se porte autour du cou comme un bijou et qui permet au système de voir ce que vous faites ou ce que vous regardez. Pour interagir avec le système, il suffit d’équiper les bouts de ses pouces et index de petites bagues plastiques de couleurs (chacune différente). Des interfaces fluides Via FastCompany, Wired et WorldChanging.
Tulio Muniz.org Expansion Boards - Rasberry Pi | eLinux.org Back to the Hub Hardware & Peripherals: Hardware - detailed information about the Raspberry Pi boards. Hardware History - guide to the Raspberry Pi models. Low-level Peripherals - using the GPIO and other connectors. Expansion Boards - GPIO plug-in boards providing additional functionality. Screens - attaching a screen to the Raspberry Pi. Cases - lots of nice cases to protect the Raspberry Pi. Other Peripherals - all sorts of peripherals used with the Raspberry Pi. Introduction On the Raspberry Pi, there are several connections which can be used for expansion: The Rpi GPIO (General Purpose Input/Output) pins are exposed, that means that expansion boards are able to talk directly to the CPU. Expansion boards by functions Power Supply and Control See also Comparison of power supply & management hardware. BattBorg BattBorg is a power converter for your Raspberry Pi which allows you to power the Raspberry Pi off batteries. Meltwater's Switched Mode Power Supply Kit Pi Supply Switch Power Pi RemotePi Board
Energies renouvelables - Pompes a chaleur Geothermie - Aerothermie - Solaire - Eolien - biomasse Pour les panneaux, je me suis contenté de les treuiller hier, et ce matin, j'ai ramassé ce qui était resté sur le toit. L'intégration en toiture se fera tranquillement la semaine prochaine. Lien vers le post qui donne les relevés à l'oscilloscope : Voilà le schéma : Version 1 (préférer la version 2 par défaut) : Edité : valeurs de résistances augmentées. Version 2 : Cette version utilisant une autre broche pour la polarisation positive semble être mieux compatible avec les différents programmes en fonction de l'initialisation du port série. L'opto est déterminant pour le bon fonctionnement, tout autre choix a peu de chance de fonctionner, les bidirectionnels sont souvent trop lents. Pour regrouper un peu les informations (recopie autre message) : Nous vendons désormais les adaptateurs téléinfo directement sur notre boutique : , qu'il serait certainement facile de modifier pour qui a les sources.
LED Series Resistor Calculator All LEDs require some form of current limiting. Connecting an LED directly to the power supply will burn it out in a heartbeat. Overdriving, even briefly, will significantly reduce it's life and light output. Fortunately, driving a single or a string of low current (20-30 mA) LEDs is a simple task - adding a small resistor in series is the easiest and cheapest way to limit the current. Keep in mind however, that high current (above a few hundreds of mA) LEDs are tougher to drive, and while they can be operated with a series resistor, to minimize power loss and ensure reliability, it's advisable to use a more expensive switching current regulator. Our LED calculator will help you determine the value of the current limiting series resistor when driving a single or an array of low-current LEDs. The program will draw a small schematic, display the calculated resistance and will tell you the value and color code of the nearest lower and higher standard resistor. Input fields
Hardware Basic Setup - Rasberry Pi | eLinux.org Back to the Hub Getting Started: Buying Guide - for advice on buying the Raspberry Pi. SD Card Setup - for information on how to prepare the SD Card used to boot your Raspberry Pi. Basic Setup - for help with buying / selecting other hardware and setting it up. Beginners Guide - you are up and running, now what can you do? Advanced Setup - for more extensive information on setting up. Trouble Shooting - some things to check if things don't work as expected. You may have decided to buy a Raspberry Pi because you think it is great, it helps if you have an idea of what you want to do with it. The Raspberry Pi can be used in the conventional computer configuration, with a keyboard, mouse and display, or in a "headless" configuration where it is available on a network and is controlled from another computer on that network. IMPORTANT For USB devices other than a mouse and a simple wired keyboard (for USB devices drawing more than 100mA) a powered USB hub is strongly recommended. Power Supply Display