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Jac Londe

The Day After Roswell - 0 views

  • by Philip J. Corso
  • Contents Forward Introduction Chapter 01 - The Roswell Desert Chapter 02 - Convoy to Fort Riley Chapter 03 - The Roswell Artifacts Chapter 04 - Inside the Pentagon at the Foreign Technology Desk Chapter 05 - The Cover-up Chapter 06 - The Strategy Chapter 07 - The EBE Chapter 08 - The Project Gets Under Way Chapter 09 - The Project Had Officially Begun Chapter 10 - The U2 Program and Project Corona - Spies in Space Chapter 11 - Project Moon Base Chapter 12 - The Integrated Circuit Chip - From the Roswell Crash Site to Silicon Valley Chapter 13 - The Laser Chapter 14 - The Antimissile Missile Project Chapter 15 - My Last Year in R&D - The Hoover Files, Fiber Optics, Supertenacity, and Other Artifacts Chapter 16 - 'Tesla’s Death Ray' and the Accelerated Particle Beam Weapon Chapter 17 - Star Wars Afterword
Jac Londe

Mini Projector Review 2015 | Best Pocket Projector | Portable Laptop Projector - TopTen... - 0 views

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    Compare the best mini projectors with side-by-side feature comparisons. Read in-depth professional reviews, articles and learn how to share the fun in your life using a portable projector. Mini Projector Review will help you choose which pocket projector will be right for you.
Jac Londe

D-Link unveils Cloud Router 1200 and 2000, dishes out WiFi in tube form -- Engadget - 0 views

  • D-Link unveils Cloud Router 1200 and 2000, dishes out WiFi in tube form
  • oth will let you remotely administrate the 802.11n router's devices from an Android or iOS app, and they both carry four gigabit Ethernet jacks as well as a USB port for some network media storage. The differences lay exclusively in the wireless support, where the single-band 1200 caters to the frugal set at 300Mbps and the simultaneous dual-band 2000 hums along at 600Mbps. Thankfully, the prices of the just-shipping access points are both about right for what you get: the Cloud Router 1200 is a cheap and cheerful $60, and the 2000 won't strain the wallet much more at $100.
Jac Londe

Caméra réseau sans fil N de D-link (DCS-930L) : Appareils photo de surveillan... - 1 views

  • Caméra réseau sans fil N de D-link (DCS-930L) Modèle # : DCS-930L CodeWEB : 10156575
  • Disponibilité Online En stock : Généralement expédié le jour ouvrable suivant Quantité restante: 8
Jac Londe

Power Searching with Google - 0 views

  • Lesson 1Introduction
  • Lesson 2Filter image results by color Activity Lesson 3How search works Activity Lesson 4The art of keyword choices Activity Lesson 5Word order matters Activity Lesson 6Finding text on a web page Activity Introduction Text Version Next
Jac Londe

FairShare - 0 views

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    Watch how your work spreads. Understand how it is used.
Jac Londe

The World's First Flying Saucer: Made Right Here on Earth: Scientific American - 0 views

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    A University of Florida researcher has plans on the drawing board for a saucer-shaped aircraft that turns the surrounding air into fuel
Jac Londe

Daedalus Projects - 0 views

  • CrazyFlie flight video
  • The copter itself is organised around the main CPU. The job of this CPU is to acquire the physical measurement given by the gyroscopes and accelerometers and to control the motors to keep the copter stable. This is done by a regulation loop which controls the motors speed 250 times per second. The radio communication has a pretty low bandwidth and is used to send commands to the copter and receive telemetry data from it. The CPU program can be updated by radio.
  • The computer runs control and telemetry programs. The control program reads the input from a game-pad and sends control commands to the copter. We also have programs that can configure the copter regulation parameters and log the measurements in order to make easier to tune the regulation. All the development is done on Windows and Linux. Indeed we are 3 to work on this project, two of us work on Linux and one is mainly on Windows. Using FLOSS permit to handle that in a very effective way. We are mainly using the GCC compiler from CodeSourcery for the copter program compilation, GNU Make for the project build, Mercurial for the source control, and python/pyusb for the communication with the copter. All these softwares works seamlessly on both Linux and Windows and made the project pretty easy to handle. The distance between the motors (horizontally and vertically) is around 8 cm and the total weight is around 20 g.
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  • The top of the board contains the sensors and the control/communication electronic: The JTAG/Serial connector permit to program the processor and to communicate debug messages. The Main CPU is a STM32 Cortex-M3. It is clocked at 64MHz from the internal oscillator. The 2 Axis X-Y Gyro is an invensense IDG500. It has an analog output and thus is connected to the CPU analog to digital converters. The 1 Axis Z gyro is an invensense ISZ500. As the X-Y gyro this is an analog chip connected to the CPU analog to digital converters. The 2.4GHz Radio is based on a nRF24L01+ chip from Nordic Semiconductor. It is actually a breakout board sold by SparkFun. The radio is connected to the CPU via a SPI port. The 3 Axis Accelerometer is a SMB380 from Bosch. It is connected to the CPU via an I²C bus.
  • Here nothing particular, except that the little battery is taped on the bottom of the copter. The battery comes from a Silverlit x-twin plane and actually permit 4.5min of flight time.
  • Under the battery we mostly have power supply and the “power” electronics: The charge connector accepts 5V and permits to charge the battery The power switch permits to power the copter either from the charge connector or from the battery. The 5V step-up permits to increase the power voltage from the 3~4V coming from the battery to 5V. The two 3.3V linear regulators, reduces the 5V to power the copter electronic. The digital and analog 3.3V are generated independently. This was made to reduce the noise on the analog components (here it is the two gyros, a quite critical part). Finally at the four sides we have the motors transistors. The power for the motors pass on the top and bottom of the part of PCB that hold the motors. It can be noted that we also have the battery charging chip just at the right of the 3.3V regulators. It is a classical MAX1555 and is working pretty well. The idea with the step-up was to get a more stable voltage when the battery is depleted and also to remove some of the noise coming from the motor electonic. Anyway, this boars is capable to work without by using 2.8V linear regulators instead. So most likely the step-up will be excluded on the next version and we also plan to integrate the radio on board. The motors and propellers are taken from a Silverlit X-twin plane. They are powered by the battery voltage.
  • The copter is controlled via a python program running on the PC. A Playstation bluetooth gamepad is used to pilote it.
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