Z code Z Code (like Q Code and X Code) is a set of codes used in CW, TTY and RTTY radio communication. Actually, there are different sets of Z-codes: one originally developed by Cable & Wireless Ltd., for commercial communications in the early days of wire and radio communications, another one independently developed by NATO forces later for military needs and use. The NATO Z Code is still in use today, and is published in the unclassified document ACP-131. There are other set of codes internally used by Russia's military and other operating agencies. A lot of the old C&W codes are derived from mnemonics (ZAL = (a)lter wave(l)ength, ZAP = (a)ck (p)lease, ZSF = (s)end (f)aster, etc. See also[edit] External links[edit]
RaspberryPi Powered Wearable Computer I have been interested in wearable computing for a while. Until the RaspberryPi was released, there was no affordable and compact option for the computer part of a wearable computer. My original setup used a laptop in a backpack, but that is a little too big to be practical. I have seen a lot of arduino based wearable electronics, but they are not exactly what I have been looking for - a full power desktop computer that you can carry around at your side and use while walking, standing, sitting, or doing anything else. As a linux guy for many years, the RaspberryPi is the perfect solution to my problem, and I'm already comfortable with the OS. Just so you guys know, this is my first instructable after being a lurker here for almost seven years. Update March 2013: I am now using a new (3D printed!) Update September 2013: Added a new video demonstration.
Q code The Q code is a standardized collection of three-letter message encodings, also known as a brevity code, all of which start with the letter "Q", initially developed for commercial radiotelegraph communication, and later adopted by other radio services, especially amateur radio. Although Q codes were created when radio used Morse code exclusively, they continued to be employed after the introduction of voice transmissions. To avoid confusion, transmitter call signs are restricted; while an embedded three-letter Q sequence may occur (for instance when requested by an amateur radio station dedicated to low-power operation), no country is ever issued an ITU prefix starting with "Q". The codes in the range QAA–QNZ are reserved for aeronautical use; QOA–QQZ for maritime use and QRA–QUZ for all services. Early developments[edit] The following table reviews a sample of the all-services Q codes adopted by the 1912 Convention: Later usage[edit] Breakdown by service[edit] Amateur radio[edit]
Make a Mind-Controlled Arduino Robot Makers Kimmo & Tero Karvinen, authors of Make: Arduino Bots and Gadgets, brought a very interesting project along with them to Maker Faire: Bay Area last year: an Arduino robot you control with your mind! The robot was a huge success and had a lot of people asking, “How do I build one?” Fortunately, Kimmo & Tero teamed up with Maker Press to bring you their latest book, Make a Mind-Controlled Arduino Robot (now available in the Maker Shed), so you can build one of your own. Mary Rotman, Publicist at O’Reilly Media, recently caught up with Kimmo & Tero for a quick Q&A. Have you always been “makers”? Be sure to watch for other great Maker Press books in the near future. Michael Castor I am the Evangelist for the Maker Shed. michaelcmaker@gmail.com Related
The Internet map The map of the Internet Like any other map, The Internet map is a scheme displaying objects’ relative position; but unlike real maps (e.g. the map of the Earth) or virtual maps (e.g. the map of Mordor), the objects shown on it are not aligned on a surface. Mathematically speaking, The Internet map is a bi-dimensional presentation of links between websites on the Internet. Every site is a circle on the map, and its size is determined by website traffic, the larger the amount of traffic, the bigger the circle. Users’ switching between websites forms links, and the stronger the link, the closer the websites tend to arrange themselves to each other. Charges and springs To draw an analogy from classical physics, one may say that websites are electrically charged bodies, while links between them are springs. Also, an analogy can be drawn from quantum physics. Anyway, the real algorithm of plotting The Internet map is quite far from the analogies given above. Semantic web The Internet Phenomenon
Arduino My older son recently started school and needed his own desk for doing homework. I wanted to make something nicer than a simple tabletop with legs, and realized that I could also build in a bit of fun for when the homework is finished. Both my boys and I still had space travel on our minds from our summer trip to Kennedy Space Center. For this desk project, I decided to go with a NASA theme. I researched the Apollo Program as well as NASA's Mission Control Center, and designed my own console roughly based on those. The desk resides under my son's loft bed (which I also built), and stays closed until the homework is finished: When playtime begins, the lid flips up to reveal the Mission Control console: As I mentioned in the video, I painted the underside of the lid with magnetic primer. The programming of the console, which I posted to GitHub, has the Arduino and the Raspberry Pi working cooperatively. The CAPCOM panel has connections for the headset as well as volume controls.
Thingternet My Nest article got me thinking about smart metering. In my head, smart metering is all about energy efficient homes constantly connected to utility companies, controlling all my appliances to minimise my energy use. The reality is a bit different A few hundred thousand UK homes have had smart meters installed so far. The full roll-out will start in 2014 and should be complete by 2019. Benefits to us are that smart meters should eliminate the massive variations that seem to exist in bills based on estimated usage. In theory, making energy meters into addressable, networked devices should be the start of a huge market. I think they’re making a mistake. Filed under Energy One of the hottest new items in the Thingternet is the Nest, a $249 home thermostat designed by Tony Fadell, co-creator of the first iPod. Nest is a very clever piece of kit. Nest have taken a ubiquitous device that is at best invisible and at worst incomprehensible, and turned it into an object of desire. - it’s small.
Arduino Λογότυπο Arduino Το Arduino είναι μια υπολογιστική πλατφόρμα βασισμένη σε μια απλή μητρική πλακέτα ανοικτού κώδικα, με ενσωματωμένο μικροελεγκτή και εισόδους/εξόδους, και η οποία μπορεί να προγραμματιστεί με τη γλώσσα Wiring (ουσιαστικά πρόκειται για τη γλώσσα προγραμματισμού C++ και ένα σύνολο από βιβλιοθήκες, υλοποιημένες επίσης στην C++ ). Το Arduino μπορεί να χρησιμοποιηθεί για την ανάπτυξη ανεξάρτητων διαδραστικών αντικειμένων αλλά και να συνδεθεί με υπολογιστή μέσω προγραμμάτων σε Processing, Max/MSP, Pure Data, SuperCollider. Το πρόγραμμα Arduino έλαβε τιμητική μνεία στην κατηγορία Digital Communities στο Prix Ars Electronica το 2006. Ιστορικό[Επεξεργασία | επεξεργασία κώδικα] Η πλακέτα του Arduino UNO 3 Το 2005, ένα σχέδιο κίνησε προκειμένου να φτιαχτεί μία συσκευή για τον έλεγχο προγραμμάτων διαδραστικών σχεδίων από μαθητές, η οποία θα ήταν ποιο φθηνή από άλλα πρωτότυπα συστήματα διαθέσιμα εκείνη την περίοδο. Εκδόσεις[Επεξεργασία | επεξεργασία κώδικα] Η πλακέτα του Arduino Lilypad
The Kneeslider — Doers and Builders Congregate Here Arduino GR Rascal Micro: small computers for art and science