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7-1930 Tangent Galvanometer - ABRA Electronics Inc. - 1 views

www.abra-electronics.com/...1930-Tangent-Galvanometer.html tangent electronics galvanometer science volt onde ondes electron
shared by Jac Londe on 03 Aug 12 - No Cached
  • The 7-1930 is a small compact Tangent Galvanometer which provides an uncomplicated method for studying direction and magnitude of magnetic fields.   It also demonstrates that deflection of a magnetic needle is proportional to current, thus becoming a simple way for students to understand the internal workings of meters. The unit is constructed on an attractive black acrylic base. Requires a 1.5-volt DC power source. Includes: instruction manual, compass and connector cords. (7" x 5" x 7").
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Android Voice Recorder - 0 views

market.android.com/details android recorder market free app
shared by Jac Londe on 03 Aug 11 - No Cached
  • Jac Londe on 03 Aug 11
     
    Thousands of users downloaded this little voice recorder.
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Aliexpress.com - Online Shopping for Electronics - 0 views

www.aliexpress.com/home2.html online electronics shopping android
shared by Jac Londe on 03 Aug 12 - No Cached
  • Jac Londe on 03 Aug 12
     
    jacl@gm aka4ds
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Android PC - 0 views

ewingwireless.en.alibaba.com/...layer_Box_Full_1080P_HDMI.html Android PC mobile objoom web3 1
shared by Jac Londe on 30 Jul 12 - No Cached
  • ndroid 4.0 Mini PC MK802 RAM 512MB ROM 4G mini TV BoxAndroid 4.0 Mini PC MK802 Features:-This is the smallest Android TV player in the world,it looks like a USB flash drive, twice as big as a USB stick,but compared to a regular small Android TV box,the size is only 25%. You can attach it to the back of your TV, easy to hide. -It outputs the video to TV via HDMI, a short HDMI cable is included, it requires your TV to have a HDMI input. -It is powered by a USB cable, this USB cable is included, but you need to purchase a compatible USB adapter (5V,2A),we can also give it to you if you tell me which country you are from, we will know what kind of USB adapter you need. -It has a regular USB port, you can connect your USB mouse or keyboard here, you can also connect a 2.4GHz wireless mouse and keyboard dongle here,please be noted that mouse and keyboard are not included. -It also has a micro USB port which can be used to connected to your PC. You can use it to copy files from your PC to this little guy. -It also has a micro TF card slot, you can insert a micro TF card with up to 32GB of movie or pictures here. -It doesnt have an ethernet port, you need to use WIFI to connect it to the internet. -It also no RGB port,no S-video port, no built-in IR,no built-in bluetooth. Are you still not clear ?-Connect this (mini CPU) to a monitor and a mouse (Fly mouse or USB mouse). -Switch ON both monitor and this player. -You’re ready to run Android 4.0 OS. -No other thing is needed. -Yes! really. It’s a complete CPU. You can play most of the latest 3D and 2D games available in market. -Performance of this device is comparable with smartphones.Specifications of Android 4.0 Mini PC -OS: Android 4.0
  • -Main Chip: Allwinner A10/ 1.5 GHz Cortex-A8 -Memory: 1GB -Storage: 4GB -Graphical processor: 2D/ 3D/ OpenGL ES2.0(AMD Z430)/OpenVG1.1(AMD Z160) 27M Tri/sec -Network: Wireless 802.11b/g, WAPI(Ralink8188) -Expand Memory: Micro TF 2-32GB -IO/Ports: Micro 5pin USB/ USB2.0 data transfer/ OTG and host expand -Keyboard: Support virtual keyboard, support 2.4G wireless keyboard, fly mouse -Audio: AAC, AAC+, eAAC+, AMR-NB, AMR-WB, QCP, MP3, WMA, WAV, MIDI, M4A -Video: WMV/ASF/MP4/3GP/3G2M4V/AVI/MJPEG/RV10/DivX/VC-1/MPEG-2/MPEG-4/H.263/H.264/720P, 1080P, 720*480-Andriod APP: Youku,Tudou,QQ,Youtube,Twitter,AngryBird,Office,Gmail,Browse,Skype -HDMI: 1080P, 2160P  
  • Jac Londe on 30 Jul 12
     
    ndroid 4.0 Mini PC MK802 RAM 512MB ROM 4G mini TV Box Android 4.0 Mini PC MK802 Features: -This is the smallest Android TV player in the world,it looks like a USB flash drive, twice as big as a USB stick,but compared to a regular small Android TV box,the size is only 25%. You can attach it to the back of your TV, easy to hide. -It outputs the video to TV via HDMI, a short HDMI cable is included, it requires your TV to have a HDMI input. -It is powered by a USB cable, this USB cable is included, but you need to purchase a compatible USB adapter (5V,2A),we can also give it to you if you tell me which country you are from, we will know what kind of USB adapter you need. -It has a regular USB port, you can connect your USB mouse or keyboard here, you can also connect a 2.4GHz wireless mouse and keyboard dongle here,please be noted that mouse and keyboard are not included. -It also has a micro USB port which can be used to connected to your PC. You can use it to copy files from your PC to this little guy. -It also has a micro TF card slot, you can insert a micro TF card with up to 32GB of movie or pictures here. -It doesnt have an ethernet port, you need to use WIFI to connect it to the internet. -It also no RGB port,no S-video port, no built-in IR,no built-in bluetooth. Are you still not clear ? -Connect this (mini CPU) to a monitor and a mouse (Fly mouse or USB mouse). -Switch ON both monitor and this player. -You're ready to run Android 4.0 OS. -No other thing is needed. -Yes! really. It's a complete CPU. You can play most of the latest 3D and 2D games available in market. -Performance of this device is comparable with smartphones. Specifications of Android 4.0 Mini PC -OS: Android 4.0 -Main Chip: Allwinner A10/ 1.5 GHz Cortex-A8 -Memory: 1GB - Storage: 4GB -Graphical processor: 2D/ 3D/ OpenGL ES2.0(AMD Z430)/OpenVG1.1(AMD Z160) 27M Tri/sec -Network: Wireless 802.11b/g, WAPI(Ralink8188) -Expand Memory: Micro TF 2-32GB -IO/Ports: Micr

URL - Diigo List Go2 - 0 views

started by Jac Londe on 24 Jul 12 no follow-up yet
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Developer Tools - Gadgets API - Google Developers - 0 views

developers.google.com/...tools Gadgets API Google Developers tools
shared by Jac Londe on 09 Jul 12 - No Cached
  • Developer Tools This document provides general guidelines for programming, debugging, and hosting gadgets. Contents Programming and Debugging Tips Start Small Study Existing Gadgets Use the Firefox JavaScript Console Confirm Your Assumptions Additional Tools Hosting through the Google Gadgets Editor File Menu Commands Publishing Your Gadget from GGE Hosting on Google Code Creating a New Project Checking Out a Project Uploading Files
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Capacité électrique - Wikipédia - 0 views

fr.wikipedia.org/Capacitance capacité électrique coulombs capacitance flux volts joules onde ondes science
shared by Jac Londe on 25 Apr 12 - No Cached
  • La capacité représente la quantité de charge électrique stockée pour un potentiel électrique donné. Elle est définie comme étant la somme des charges électriques d'un élément divisée par le potentiel de cet élément : La capacité peut être également exprimée à l'aide du flux électrique (voir théorème de Gauss) : où C est la capacité en farads Q est la charge en coulombs U est le potentiel en volts la permittivité électrique du vide qui vaut 8,854.10-12 F·m-1 est le flux électrique (associé à la charge Q en coulombs), le flux s'exprime en Weber. Tension à ses bornes :
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delta ray (physics) -- Britannica Online Encyclopedia - 0 views

www.britannica.com/...delta-ray volt science delta gamma ray electron physics
shared by Jac Londe on 23 Apr 12 - No Cached
  • Jac Londe on 23 Apr 12
     
    delta ray,  in physics, any atomic electron that has acquired sufficient energy by recoiling from a charged particle passing through matter to force, in turn, some dozens of electrons out of other atoms along its own trajectory. The charged particle giving rise to delta rays generally is relatively large, such as an alpha particle (composed of two protons and two neutrons), but may also be a high-speed electron. This particle, as it slows down in matter, forces thousands of electrons out of atoms by ionization, producing a wake of electrons and positive ions (electron-deficient atoms) that can be detected. The detached electrons are usually of such low energy that they cannot produce further ionization. But periodically, a relatively large amount of energy is transferred to an electron by a nearly head-on collision along the path of the primary ionizing particle. These are the energetic electrons that cause secondary ionization and are referred to as delta rays. On a developed photographic emulsion, in which strongly ionizing particles have left dense tracks, delta rays appear as thin wavy spurs or branches. The term delta ray, first used by the British physicist J.J. Thomson, is sometimes extended to any recoil particle that causes secondary ionization. LINKS Related Articles
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Rayon gamma - Wikipédia - 0 views

fr.wikipedia.org/Rayon_gamma gamma electron volt energie science onde ondes
shared by Jac Londe on 23 Apr 12 - No Cached
  • Rayon gamma est le nom donné au rayonnement électromagnétique produit, par la désexcitation d'un noyau atomique résultant d'une désintégration, ou par des phénomènes subatomiques comme l'annihilation d'une paire électron-positon. Ils ont une énergie qui varie dans une plage allant de la centaine à plusieurs centaines de gigaélectron-volts. Leurs longueurs d'onde est inférieure à 5×10-12 m. La découverte des rayons gamma est due à Paul Villard, chimiste français (1860-1934).

Le journal des ondes - 0 views

started by Jac Londe on 23 Apr 12 no follow-up yet
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USB Pinout - Connector Wiring for USB A, USB B, and Mini USB Interfaces - 0 views

www.connections-usa.com/usb_pinout.html USB connector wiring interfaces arduino objoom
shared by Jac Londe on 27 Aug 11 - No Cached
  • USB Pinout - Connector Wiring for USB A, USB B, and Mini USB InterfacesUSB (Universal Serial Bus) is an interface designed to connect peripherals such as mice, keyboards, scanners, digital cameras, printers, hard disks, and networking components to PC.
  • USB pinout signals USB is a serial bus. It uses 4 shielded wires: two for power (+5v & GND) and two for differential data signals (labelled as D+ and D- in pinout). NRZI (Non Return to Zero Invert) encoding scheme used to send data with a sync field to synchronise the host and receiver clocks. In USB data cable Data+ and Data- signals are transmitted on a twisted pair. No termination needed. Half-duplex differential signaling helps to combat the effects of electromagnetic noise on longer lines. Contrary to popular belief, D+ and D- operate together; they are not separate simplex connections.
  • USB transfer modes Univeral serial bus supports Control, Interrupt, Bulk and Isochronous transfer modes.USB transfer rates: Low Speed, Full Speed, Hi-speed. USB supports three data rates: Low Speed (1.5 Mbit per second) that is mostly used for Human Input Devices (HID) such as keyboards, mice, joysticks and often the buttons on higher speed devices such as printers or scanners; Full Speed (12 Mbit per second) which is widely supported by USB hubs, assumes that devices divide the USB bandwidth between them in a first-come first-serve basis - it"s easy to run out of bandwidth with several devices; Hi-Speed (480 Mbit per second) was added in USB 2.0 specification. Not all USB 2.0 devices are Hi-Speed. A USB device must indicate its speed by pulling either the D+ or D- line high to 3.3 volts. These pull up resistors at the device end will also be used by the host or hub to detect the presence of a device connected to its port. Without a pull up resistor, USB assumes there is nothing connected to the bus. In order to help user to identify maximum speed of device, USB device often specify it's speed on it's cover with one of USB special marketing logos.
  • ...6 more annotations...
  • USB powered devices The USB connector provides a single 5 volt wire from which connected USB devices may power themselves. A given segment of the bus is specified to deliver up to 500 mA. This is often enough to power several devices
  • USB cable shielding:Shield should only be connected to Ground at the host. No device should connect Shield to Ground.USB cable wires: Shielded:Data: 28 AWG twistedPower: 28 AWG - 20 AWG non-twisted Non-shielded:Data: 28 AWG non-twistedPower: 28 AWG - 20 AWG non-twisted  
  • USB voltage: Supplied voltage by a host or a powered hub ports is between 4.75 V and 5.25 V. Maximum voltage drop for bus-powered hubs is 0.35 V from it's host or hub to the hubs output port. All hubs and functions must be able to send configuration data at 4.4 V, but only low-power functions need to be working at this voltage. Normal operational voltage for functions is minimum 4.75 V.
  • USB power usage:Bus-powered hubs: Draw Max 100 mA at power up and 500 mA normally.Self-powered hubs: Draw Max 100 mA, must supply 500 mA to each port.Low power, bus-powered functions: Draw Max 100 mA.High power, bus-powered functions: Self-powered hubs: Draw Max 100 mA, must supply 500 mA to each port.Self-powered functions: Draw Max 100 mA.Suspended device: Max 0.5 mA
  • Pin Name Cable color Description 1 VCC Red +5 VDC 2 D- White Data - 3 D+ Green Data + 4 GND Black Ground 4 pin USB A or USB B plug�connector at the peripherals 4 pin USB A / USB B / mini-USB jack�connector at the controller Pin x of mini-USB connector usually not used or connected to GND.
  • The Universal Serial Bus is host controlled and there can be only one host per bus. An USB system consist of a host controller and multiple devices connected in a tree-like fashion using special hub devices. Hubs may be cascaded, up to 5 levels.
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JavaScript has problems. Do we need Dart to solve them? - 0 views

arstechnica.com/...an-googles-dart-solve-them.ars javascript dart google
shared by Jac Londe on 13 Oct 11 - No Cached
  • Google hopes to upset JavaScript's dominance by introducing a new language, Dart. Dart is designed to be simpler, more familiar, and faster than JavaScript, and Google one day wants to see it everywhere: in the browser, on the server, and maybe even on the smartphone.
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Erg (unité) - Wikipédia - 0 views

fr.wikipedia.org/...Erg_(unit%C3%A9) erg système international unités wikipédia unit unité wiki
shared by Jac Londe on 02 Dec 11 - No Cached
  • L'erg (du grec εργον ergon travail; occupation; ouvrage) est une unité de mesure de l'énergie, du travail dans le système CGS. Un erg vaut 1 g⋅cm2⋅s-2, c'est-à-dire 10-7 J.
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Carrier Sense Multiple Access with Collision Avoidance - 0 views

fr.wikipedia.org/802.15.4 norme wifi bluetooth 802.15 ondes waves carrier
shared by Jac Londe on 04 Mar 12 - No Cached
  • Jac Londe on 04 Mar 12
     
    CSDMA/CA
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Électron-volt - Wikipédia - 0 views

fr.wikipedia.org/...Giga%C3%A9lectron-volt electron volt energie science onde ondes
shared by Jac Londe on 23 Apr 12 - No Cached
  • En physique, l'électron-volt[1] (symbole eV) est une unité de mesure d'énergie. Sa valeur est définie comme étant l'énergie cinétique d'un électron accéléré depuis le repos par une différence de potentiel d'un volt. Un électron-volt est donc égal à environ 1,60217653×10-19 joule (J)[2]. C'est une unité hors système international (SI) dont la valeur est obtenue expérimentalement. On utilise l'électron-volt notamment en physique des particules pour exprimer les niveaux d'énergie rencontrés dans les accélérateurs de particules et la fusion thermonucléaire, en physique des semi-conducteurs pour exprimer le gap de ceux-ci ou en physique des plasmas : Multiples usuels  1 keV = 103 eV 1 MeV = 106 eV 1 GeV = 109 eV 1 TeV = 1012 eV Dans certains documents relativement anciens, on peut voir la notation "BeV" pour « billion electronvolt » : elle est équivalente au GeV (gigaélectron-volt).
  • D'après la relation E = m·c2 de la relativité restreinte, on déduit : Par exemple, la masse de l'électron est de 511 keV/c2, celle du proton de 938 MeV/c2 et celle du neutron est de 940 MeV/c2. Dans le système d'unités naturelles souvent utilisé par les physiciens des particules, dans lequel on pose c=1, on omet d'écrire le « .../c2 ».
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Layer on layer with z-index (Layers) - HTML.net - 0 views

html.net/...lesson15.php lesson layer layers html
shared by Jac Londe on 19 Dec 13 - No Cached
  • Layer on layer with z-index
  • CSS operates in three dimensions - height, width and depth. We have seen the first two dimensions in previous lessons. In this lesson, we will learn how to let different elements become layers. In short, this means the order of which the elements overlap one another. For that purpose, you can assign each element a number (z-index). The system is that an element with a higher number overlaps an element with a lower number.
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