13 Jan '14, 10am

Building a Frequency Synthesiser with a BeagleBone Black

There are a few additional features of the AD9954 i.c. that are of great interest beyond the basic DDS functionality described. Additional registers allow for functions such as automatic frequency ramping (using a ‘frequency accumulator’) and for adjustment of the output amplitude (by multiplying the output from the look-up table by a factor). One of the best features is that there is a large amount of RAM available that can store 1024 different frequencies. It is possible to instruct the AD9954 to step through the RAM in certain programs of operation. This opens up possibilities to rapidly change frequency (far quicker than any analog oscillator) and to implement some interesting frequency-hop types of use-cases. Yet another use for this feature is to implement modulation; this will be the way frequency modulation (FM) is implemented in this project (it is described later...

Full article: http://www.element14.com/community/groups/test-and-measur...

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俺が翻訳したのだけど、出来はどうだろう?

rubini.us 14 Jan '14, 11am

あなたはソースディレクトリからRubiniusをビルドし、実行することができます。 インストールは不要です。以下ではRubiniusのインストールとソースディレクトリ からの実行の両方について詳しく説明します。 RubiniusはJITコンパイ...

Win a free #BeagleBone Black from @element14! #...

element14.com 13 Jan '14, 12pm

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Building And Wellbeing - Call For Papers

greenbuildingpress.co.uk 13 Jan '14, 3pm

As a start to the programme, BRE and UBM have announced a research paper competition to bring together and showcase curren...

Green building pioneer awarded OBE - Green Building Press: Green Building Press Green building pioneer awarded

Green building pioneer awarded OBE - Green Buil...

greenbuildingpress.co.uk 12 Jan '14, 6pm

The award recognizes John’s contributions over a career spanning over half a century throughout which he has championed th...

Net Zero Is All About the Building Envelope

Net Zero Is All About the Building Envelope

jetsongreen.com 13 Jan '14, 9pm

Miller, who has been working in the green building and solar heating field for over 40 years, has designed the walls of th...

We're giving away a BeagleBone Black! Enter her...

element14.com 12 Jan '14, 3pm

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Say What? A Quick Guide to Building Science Jargon

ecobuildingpulse.com 14 Jan '14, 12am

What do MEC, NPP, and RTFM mean? Here's a hint: They're not texting shorthand; they're building science acronyms. Some, li...

Architects to Watch: Vahid Mojarrab & Jonah Stanford | Green Building and Design

Architects to Watch: Vahid Mojarrab & Jonah Sta...

gbdmagazine.com 12 Jan '14, 7pm

What was your first project together? Jonah Stanford: VolksHouse was the first official MoSA project. The challenge was to...