April 22 - Kickstarter: UDOO Neo
Endeavour’s Last Launch is Perfect!
Endeavour successfully launched today from the Kennedy Space Center at approximately 8:56 am eastern for its 25th and final mission. Mission STS-134 headed by Commander Mark Kelly, Pilot Gregory H. Johnson and Mission Specialists Michael Fincke, Greg Chamitoff, Andrew Feustel and European Space Agency astronaut Roberto Vittori, will last 16 days.
During the 16-day mission, Endeavour and its crew will deliver the Alpha Magnetic Spectrometer (AMS) and spare parts including two S-band communications antennas, a high-pressure gas tank and additional spare parts for Dextre.
The flight is Endeavour's 25th since a maiden voyage in 1992. The youngest shuttle orbiter was built as a replacement for Challenger, the shuttle destroyed in a 1986 launch accident that killed seven astronauts. Endeavour has traveled 116,372,930 miles, spent 283 days in space and has had a total of 4,423 orbits since its first mission. After returning to earth in 16 days time Endeavour will be retired to a Los Angeles museum.
photo credit: NASA
Wi-Fi on the Big Wire
Classic embedded Wi-Fi web servers based on microcontrollers have met their match. The ACKme Numbat stuffs an ARM microprocessor, Wi-Fi radio, TCP/IP stack, UART, real time clock, multiple GPIO pins, analog-to-digital converters, PWM generators, SPI portals, 1 MB of serial Flash, and an I2C interface into a 0.8” x 0.6” x 0.11” SMT package. All you need is a PC serial port and a terminal emulator to gain access to the Numbat’s rich set of resources. Read More...
Serial I/O Data Interfaces: Part 2
Get familiar with the high speed gigabit serial interfaces that dominate I/O today since we all use at least one of these regularly. Read More...
Move up in frequency to the oscillators which make the signals that drive the ham’s wireless world. Read More...
PICAXE-PC Serial Communication — Part 1
We’ll continue our experiments with the Prolific cable, but this time focus on sending data back and forth between a PICAXE processor and a PC. Read More...
Reader Questions Answered Here (05.2015)
A question on op-amp accuracy, getting certified, and some tips on batteries. Read More...
March 31 - The eBay Treasure Hunt
November 26 - Anwser for D Cell or Gell Cell Adapter for Nikon Cameras Use Nikon’s EP5 power supply connector. No camera modification or battery door removal is required. Now the remaining trick is…
August 23 - Anwser for Laser Power Supply Too bad I didn’t read your entry just a little more closely… I have not seen such a powerful diode…
January 28 - Anwser for Traffic Detector Robert beat me to the punch regarding the Doppler. My thought was to install both a Doppler sensor (like a…
November 07 - Tesla Coil Theory Thank’s for answering my question Bart, I was alway’s fascinated with Nikola Tesla inventions and what he did in Colorado…
August 02 - Diode Selection On Multimeter Thanks a lot! GFP.