hpb @ instructable writes:
I was looking for a dual voltage power supply initially to power an old HDD with 12V and 5V. I wanted to build a home server based on the Raspberry Pi. I later realized that I had a newer hard-drive that needed only 5V. By then I had already designed and built this one. This power supply has a typical efficiency of 85%+ under real-world conditions and is based on TI’s TPS54383 DC-DC converter chip which operates at 300 KHz. A 600 KHz version is also available and is a drop-in replacement for TPS54383.
High efficiency Dual Voltage 3A power supply - [Link]
lightnin9 @ instructables.com writes:
Now everybody knows it’s way smarter to just pay someone to host your website. But what not everybody knows is that it’s way more punk rock to Do it Yourself. So what follows are some tips / pointers / instructions for setting up your own home webserver (which will burn a scant 2 watts) using all free, open source software, a Raspberry Pi, and your home internet connection.
The emphasis here is on lightweight, which fits well with the Raspberry Pi. Sure, you can setup a blog with wordpress or Django, and they will run (I’ve tried it, at least with Django). But they probably will run rather slowly. Why? The rPi doesn’t have a lot of memory or processing power, and a database / front end model requires a decent amount of that. If your site / blog ever gets much traffic, it’ll likely buckle under the load. The answer? Just serve up plain old static HTML pages. It’s fast, secure, simple, and easy on the rPi’s limited resources. But rather than painstakingly handcodeing each new blog entry, you can use a static html generator like Pelican to make it easy.
Host your own blog from a $25 Raspberry Pi computer - [Link]
“Click And See “ is a system supporting the search of electronic components. The idea came during yesterday’s shopping in one of the electronics stores , cabinets with electronic components fill the entire wall. When buying several different components , the seller needs time to find them first in your computer , then in the appropriate bins , and the queue of customers getting longer … To facilitate this, I designed a simple , wireless and easy to expand the system to highlight the drawer of the element that want to buy .
more info here: CLICK_AND_SEE_ENG
Click and See – find electronics parts with a click - [Link]
The world’s first 100MS/s open source oscilloscope for iPad, Android and PC. A must-have for every Arduino and Raspberry Pi developer!
The SmartScope combines 3 high-end instruments into 1 mobile, smart device. Accessible previously only to high-tech labs, the SmartScope allows everyone to own a personal lab!
Starring a dual-channel 100MS/s oscilloscope, the SmartScope is the world’s first lab instrument which works on both PC, laptop, tablet and smartphone. This is a must-have for any maker, and for anybody involved in hardware development!
SmartScope – 100MS/s Open Source Oscilloscope for mobile devices and PC (Kickstarter) - [Link]
This learning project from Adafruit describes how to make your own point-and-shoot digital camera using the Raspberry Pi board. In addition, you will also need the Raspberry Pi Camera Board, a TFT touchscreen, a battery pack and a Wifi adapter to automatically transfer pictures to another PC for editing.
Make your own digital camera using Raspberry Pi - [Link]
Gert van Loo, the Broadcom employee responsible for the RPi alpha build has now come up with the Gertduino. He also gave us the GertBoard GPIO Expansion board some time ago which provides general purpose I/Os, LEDs and motor driver capabilities for the Rpi. Gert’s latest creation, the Gertduino board, plugs onto the RPi and connects it to virtually any existing Arduino Shield. The board itself basically offers the same functionality as the Arduino-Uno but with some added features thrown in.
As well as an ATmega328 and ATmega48 (both of which can be programmed from the Raspberry Pi using the Arduino GUI or the GCC Atmel compiler), the Gertduino packs a real time clock, 16MHz oscillator, IRDA interface, RS232 level converter and a battery back-up power supply for the ATmega48.
Gertduino: The Raspberry Pi /Arduino Missing Link - [Link]
See a Raspberry Pi constructed from scratch. From start to finish we show the manufacturing process of the Raspberry Pi at the Sony facility in Pencoed South Wales: assembly, inspection and testing. Claire Doyle, Head of Raspberry Pi Global Division at Element 14, and Gareth Jones, Senior Manager New Business Development at Sony Uk Tech, talk us through the process.
How they make Raspberry Pi in the UK - [Link]
Clemens Valens, Editor-in-Chief of Elektor Online and head of Elektor Labs, caught up with Peter Lomas, hardware designer for the Raspberry Pi single-board computer, earlier this year at the Embedded World 2013 trade show in Nuremberg, Germany. This is a longer version of an interview with Lomas published in Elektor’s May 2013 issue. The Lomas interview provided a one-year update on the rapid growth of interest in the Raspberry Pi since Elektor’s April 2012 interview with Eben Upton, one of the founders and trustees of the Raspberry Pi Foundation. The UK-based charitable foundation developed the inexpensive, credit card-sized computer to encourage the study of basic computer science in schools. In early 2012, the Raspberry Pi’s first production batches were arriving. Since then, more than 1 million boards have been sold.
Raspberry Pi: One Year Later, 1 Million Sold - [Link]
How single board computers changing the maker community. Cabe Atwell writes:
Since the coming of the Raspberry Pi Model B, single-board computers (SBCs) have become a prevalent force in the development world. These pocket-sized devices have taken the online maker community in particular by storm, providing PC functionality to a plethora of open-source projects in amazingly compact, cost-effective, and low-power platforms.
It’s not an overstatement to say these tiny computers have engendered a technological revolution of their own by pushing the limits of technological creativity achievable in the palm of one’s hand. As an added benefit, SBCs have served as cheaply obtainable educational tools for teaching the ever-important concepts of computer science to the younger generation. Test engineers, those seeking to build one-off projects, and hobbyists have embraced, and appreciate, this mini computer platform. Similar to how the smartphone changed how we use phones, SBCs are poised to change how we approach embedded systems development.
The biggest-little revolution: 10 single-board computers for under $100 - [Link]
A tiny Cellular development board that gives you Wireless Worldwide. That means internet to anything anywhere! Project is not live yet, but feedback is appreciated.
The CELLv1.0 is an easy-to-use cellular development kit. Add it to your Arduino, Raspberry Pi, or any other project you have to instantly add wireless communications capable of operating anywhere in the world!
The CELLv1.0 kit will include the cellular board, a jumper board to allow Arduino, Raspberry Pi, or any development board, an antenna, and power cable. As per Kickstarter fashion, SparqEE also offers several dev boards and shields such as GPS, accelerometer, relay, and a connection to the Arduino and Raspberry Pi, made available through Kickstarter’s donation reward system.
“I’ve been on plenty of projects where a simple cellular connection would have been a game changer to have,” says SparqEE co-founder Chris Higgins, “and as far as the CELLv1.0 not having an on-board processor, a critique I recently received, every year there’s a better MCU but I constantly reuse my breakout boards. We wanted to give people something they could use on any project well into the future and on any board, not just the current rev of the Arduino or Raspberry Pi.”
SparqEE CELLv1.0: Cellular made easy (Arduino/Pi/+) - [Link]