Raspberry Pi: Project 1 – Pandora Streamer « Engineering « Shaun Gehring Overview – What is it Using a Raspberry Pi you can create a pretty cool stand alone Pandora Streamer. Its a pretty easy project to put together and will only take an evening. Even though this project is basic from a Electrical Engineering standpoint you will learn the basics of GPIO, Python, BASH and basic Circuts. I do not just want to show you what i did but show you where i went wrong and how i got the correct answers so you will feel confident trying this stuff yourself. I originally found this project on Instructables ( What you will need Optional WIFI adapter Lets get started Step 1 – Get the Raspberry Pi Prepped A. B. In LXTerminal: sudo nano /boot/cmdline.txt And change: dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 $ to: dwc_otg.lpm_enable=0 console=tty1 $ Next: sudo nano /etc/inittab #Spawn a getty on Raspberry Pi serial lineT0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100 C.
Tree Speakers These tree speakers were handmade from +14" thick sections of what was once a towering elm tree, that have now been transformed into a completely unique piece of hi-fi art. The speaker enclosure is made from one solid piece of elm, sectioned only at the rear of the speaker in order to hollow out enough material to create the speakers internal volume of air. Aside from being aesthetically pleasing and unique, using actual tree rounds as speaker enclosures is beneficial to the overall speaker design because it results in an almost seam-free cabinet, thick and acoustically dead enclosure material, and non-parallel internal sides which help to reduce unwanted frequency amplification and reverberation. This Instructable describes the unique process of how I built these specific tree speakers, and is not meant to be a complete and comprehensive guide to speaker building. I think that the appropriate question to ask here is not "why build speakers out of a tree", but rather, "why not"?
Raspberry Pi Project Ideas: How I Built Call Mom Button | Plivo Blog Coming back from PyCon 2013, I was looking for interesting Raspberry Pi project ideas that would attract the attention of both non-programming students and those with more experience. I was averaging one Raspberry Python class each month at my hackerspace, MakerBar. I decided that the project should relate to Mother’s day and have something my students could take home or perhaps even give to their Mom as a nifty gift. So I decided to teach my students how to access a web API and settled on the Call Mom button—a Raspberry Pi board with a set of four buttons connected via Plivo, which gives you not only the titular Call Mom button, but also a Call Dad button—just to be fair with Dads—a “Text Mom I love her” button, and a spare button which students could use however they want. With this Raspberry Pi project, I had won Twitter contest sponsored by Plivo at PyCon and my students had a great time building their own buttons in class. What is Raspberry Pi? What is Plivo? 1. Circuit Diagram#1 2.
Memory, Mnemonics and Mnemonic Techniques from MindTools.com © VeerPRZEMYSLAW PRZYBYLSKI Use these techniques to improve your memory. The tools in this section help you to improve your memory. They help you both to remember facts accurately and to remember the structure of information. The tools are split into two sections. As with other mind tools, the more practice you give yourself with these techniques, the more effectively you will use them. Mnemonics 'Mnemonic' is another word for memory tool. The idea behind using mnemonics is to encode difficult-to-remember information in a way that is much easier to remember. Our brains evolved to code and interpret complex stimuli such as images, colors, structures, sounds, smells, tastes, touch, positions, emotions and language. Unfortunately, a lot of the information we have to remember in modern life is presented differently – as words printed on a page. This section of Mind Tools shows you how to use all the memory resources available to you to remember information in a highly efficient way.
Researchers Build Supercomputer from Legos and Raspberry Pi © University of SouthamptonIn a twist on the usual use for the tiny Raspberry Pi computers, a team of computation engineers have built a supercomputer by linking together 64 of the devices and then housing it in a rack made from those little plastic blocks we all know and love. The team at the University of Southampton, led by Professor Simon Cox, built the system for under £2,500 (~$4000), and see it as "as a starting point to inspire and enable students to apply high-performance computing and data handling to tackle complex engineering and scientific challenges". "As soon as we were able to source sufficient Raspberry Pi computers we wanted to see if it was possible to link them together into a supercomputer. We installed and built all of the necessary software on the Pi starting from a standard Debian Wheezy system image and we have published a guide so you can build your own supercomputer." - Cox
The easy light up, animated table. No electronics skills needed! It is easy and super cool to make. Yeah, Yeah, I know that there are some other Instructables out there on how to build a light up table, but this one is different. The table is based off of mrgalleta's Instructable, but you don't have to have any electronics skills to build it. Like I was, you are probably thinking, "Wow, those tables are so cool, but how am I ever going to be able to build one? I don't know how to work with micro controllers, IC's, and other complicated electronics" That is why I decided to build this table. First off, I have no micro controller programming skills, so the table needed to look cool while still having the ability to do some animations. Here is the finished project with the "random" animation feature turned on:
How to Test Your Internet Speed with a Terminal Command Wabi Sabi: Beauty in Brokenness | My Refuge House In this line of work, brokenness is a concept we are very familiar with. Broken lives, broken families, girls who have been used and taken advantage of and kicked to the curb; boys too, more and more commonly. Trafficking at it’s core, is a study of brokenness. Yesterday I attended New Heart Community Church, the church that started My Refuge House in 2008. In fact, Wabi Sabi means that scars and blemishes on the outside of a precious item, actually serve to magnify the purity and greatness of the whole object. As a culture, in the western world, we have been taught to revere perfection. For example, in some Japanese pottery, artists who will take pieces of pottery with cracks and blemishes and fill in those scars with pure gold. indistinguishable, the artists enhance them, filling them in with luminescent gold. Because the brokenness, the imperfection, in and of itself, is the most valuable part. It is a huge challenge, working with trafficking survivors.
Tutorial: How to Set Up a Raspberry Pi Web Server People are doing a lot of cool things with the Raspberry Pi. One of the first things I thought to do was to see if I could make a Raspberry Pi web server. Being a web developer and overall geek I figured it might be kind of fun to do, and as I found out it’s really easy. Getting Started Setting up a Web Server on this device really isn’t much different from any other Linux machine, but there are a couple things you’ll want to do in order to get it working right. The first thing you want to do is get the Raspian Wheezy Image from here. The Raspberry Pi has a “memory_split” option that divides the memory between the CPU and GPU (Graphics). You may want to also enable the SSH server if that’s how you’re going to be accessing the device. Note: You can overclock this device, but I wouldn’t recommend it. After you’ve saved your settings reboot the device. Next we’re going to do a firmware upgrade, we need to install git: then download the firmware update and run it: Install Apache and PHP: Summary
How to make a Ruben's Tube Please Rate this Instructable and follow me for more cool step by step guides. Made By Manish Kumar, Murtaza Tunio and Minaam Abbas The Ruben's Tube is a physics experiment demonstrating a standing wave. It demonstrates the link between sound pressure and sound waves. A length of pipe is perforated along the top and sealed at both ends - one seal is attached to a small speaker or frequency generator, the other to a supply of a flammable gas (propane tank). Since the time averaged pressure is equal at all points of the tube, it is not straightforward to explain the different flame heights.
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