You’d think the Amateur Radio types would have Ohm’s law in their toolbelt and not be afraid to use it. Between QRZ forums and this month’s QST, it doesn’t seem so when it comes to emergency backup power systems. For medium sized solar systems with battery backup, systems in the one to ten kilowatt hour [...]
DC for data centers at Gigaom has some good history and a few interesting tidbits on a trend towards DC in data centers. They miss the big issue, though. The reason that Tesla and Westinghouse won out over Edison in establishing AC as the power distribution standard was about electrical power delivery over distance. With [...]
The new user interface in Ubuntu really shakes some folks up. jorge’s stompbox has The Power User’s Guide to Unity that provides an index to the Q&A for Ubuntu users and developers on common issues. There are also links to videos and other guides about Unity. The list of application indicators, for instance, says to [...]
John Weidner has several posts on Bible facts you may not know at Random Jottings. In #3 he notes that people in Jesus’ time didn’t travel alone but lived, and traveled, in extended family groups. There is also the item that fishing belonged to the state and the fishermen Jesus recruited had to have had [...]
Wireless Telegraphy in Australia is a history of early radio communications efforts between Australia and England. It makes me think of the opening of the movie Dr. No where the Bermuda agent is assassinated as his secretary opens the radio link to London. There were large installations involved in transcontinental communications, even up through the [...]
If you were 18, what do you really need to know? Rightwing News has a list and it’s good for more than just the 18 year old crowd. There are at least six key areas of your life: health, career, romantic, social, money, and religion. If you neglect any one of those areas, it will [...]
Elegant Coding looks like a good blog to keep an eye on. Eleven Equations True Computer Science Geeks Should (at Least Pretend to) Know has a list that will have me going back to the books to figure out what the symbols mean (again) and figure out what these important mathematical concepts mean. A Confederacy [...]
Dive Into Python 3 is an online book the author hopes will lead you to the dead tree version (Dive Into Python 3) at Amazon. Reading through a few chapters tells me it is worth a bookmark to read more. The style is not cumbersome and some ideas appear to be well explained. The chapter [...]
When you get into the digital modes on Amateur Radio bands, you have a need to learn a new skill. There is help. One of these is the fldigi page on identifying Modes – Sight & Sounds. Two tools are provided for 14 types of signals with a link to a description of all PSK [...]
Ideas to Integrated Circuits links to a number of interesting, first person, stories about the development of modern electronic devices such as the GFI. “The Characterization process of first silicon was an attempt to feel out how an IC would run in production. Things like beta and resistance would vary month to month. So a [...]