Presents Wolfson Audio Card for Raspb Overview Wolfson and element14 introduce an audio card to offer Raspberry Pi users the ability to capture audio alongside their camera, and experiment with stereo digital capture and playback. Raspberry Pi, whilst doing a fantastic job of being a small and powerful computer, does this by a number of compromises. One of those is the limitations on its audio capabilities. MC2 can transform into 8 different bikes There are plenty of bikes out on the market but most companies stick to the traditional design as anything off the ordinary is at risk of not being a success. The MC2 from IDSG Engineering and Trading however is a transforming bike which can be arranged into one of eight different configurations. [Image Courtesy of MC2Bike] The MC2 has been moslty shown in what is called the Cruiser mode which takes on the appearance of a tricycle/penny farthing type bike. When you look at the pedals on the front wheel in this set-up you might immediately think of fixed gear bikes, however, in this case the wheel hub of the bike comes with a planetary gear system and two brake rotors.
25 Hardening Security Tips for Linux Servers Everybody says that Linux is secure by default and agreed to some extend (It’s debatable topics). However, Linux has in-built security model in place by default. Need to tune it up and customize as per your need which may help to make more secure system. System and Administrative Commands mount Mount a filesystem, usually on an external device, such as a floppy or CDROM. The file /etc/fstab provides a handy listing of available filesystems, partitions, and devices, including options, that may be automatically or manually mounted. The file /etc/mtab shows the currently mounted filesystems and partitions (including the virtual ones, such as /proc). mount -a mounts all filesystems and partitions listed in /etc/fstab, except those with a noauto option.
How to: Install Let’s Encrypt certificates - How to - YunoHost Forum Hi everyone, Let's encrypt went into public beta recently, which means anybody can use their services now to get "trusted" certificates and get rid of self-signed certificates. There are only sparse documentation on the internet now (and most of them not so newbies-friendly ?), so I'm opening this thread to help people who are willing to understand how this works, and get the certificates running including the few tweaks specific to YunoHost. Disclaimer: this thread in work in progress, I'll update it as my understanding improves and feedback is received.
Pi MusicBox Make your Raspberry Pi stream! Welcome to the Swiss Army Knife of streaming music using the Raspberry Pi. With Pi MusicBox, you can create a cheap (Sonos-like) standalone streaming music player for Spotify, Google Music, SoundCloud, Webradio, Podcasts and other music from the cloud. Amazing ERO Concrete-Recycling Robot Can Erase Entire Buildings Demolition is a messy business—not only does the process require heavy machinery and produce clouds of dust, but it also results in giant piles of rubble that often head straight for the landfill. Omer Haciomeroglu, a student at Sweden’s Umeå Institute of Design has designed Ero – a robot that recycles concrete in an energy-efficient manner and separates it from rebar and other debris on the spot. The project won the 2013 International Design Excellence Award (IDEA) in the Student Designs category. Heavy machines used in demolition consume large amounts of energy in order to crush concrete walls into small pieces, not to mention that demolition processes have to be accompanied by large amounts of water sprayed onto the structures to prevent the spread of dust.
How to Setup and Configure an OpenVPN Server on CentOS 6 Introduction This article will guide you through the setup and configuration of OpenVPN server on your CentOS 6 cloud server. We will also cover how to configure your Windows, OS X, or Linux client to connect to your newly installed OpenVPN server. Before we begin, you'll need to have the Extra Packages for Enterprise Linux (EPEL) Repository enabled on your cloud server. Blue Net – Support » Blog Archive » 10 Linux shell tricks you don’t already know. Really, we swear. Rescued from Google page as site seems to be down. This information is gold. So it is republished from: The original link therefore is:
The NSA back door to NIST Thomas C. Hales (University of Pittsburgh) (This article will be published in the Notices of the American Mathematical Society.) Use once. Note names, MIDI numbers and frequencies Note names, MIDI numbers and frequencies are related here in tables and via an application that converts them. The musical interval between two notes depends on the ratio of their frequencies. See Frequency and Pitch for more details and an introduction to frequency and pitch. An octave is a ratio of 2:1 and, in equal temperament, an octave comprises 12 equal semitones. Each semitone therefore has a ratio of 21/12 (approximately 1.059).
Clothes Dryer of the Future Uses Vibrations, Not Heat Scientists at Tennessee’s Oak Ridge National Laboratory have developed a “dryer of the future” that uses high-frequency vibrations instead of heat to extract moisture from clothes. Compared with traditional tumble dryers, which can consume as much energy as a refrigerator, clothes washer, and dishwasher combined, according to the Natural Resources Defense Council, the newfangled process significantly reduces drying time and energy use. Ayyoub M. Momen, the research engineer spearheading the project, said his invention was inspired by commercial humidifiers that use ultrasonic transducers to convert water into tiny droplets, creating a cool mist. “When I put a very small piece of fabric on top of these transducers, in just 14 seconds I could dry fabric from completely wet to completely dry,” Momen, who described the results as “amazing and mind-blowing,” told U.S.A. Today.
20.2. Configuring a DHCP Server To configure a DHCP server, you must create the dhcpd.conf configuration file in the /etc/ directory. A sample file can be found at /usr/share/doc/dhcp-<version>/dhcpd.conf.sample. DHCP also uses the file /var/lib/dhcpd/dhcpd.leases to store the client lease database. Refer to Section 20.2.2, “Lease Database” for more information.