Elektratig (Free subscription) | yesterday
It's been a while since I've built an audio kit (other than replacing the output transformer on and generally neatening up the wiring of my Assemblage ST-40 ), primarily because I've got more amps and preamps than you can shake a stick at. But I ran across one the other week I just couldn't resist: a battery-powered preamp. I've long wanted to try battery power. Although most of you are probably shaking...
Angry Bear (Free subscription) | 11/07/2009
Robert Waldmann I am eager to learn from this blog again. A problem with solar and wind generation of electricity is the sun isn't always shining and the wind isn't always blowing and it is costly to store energy. I don't see why energy can't be stored using hydroelectric dams. They store huge amounts of energy in lakes. So what's the problem. More thoughts after the jump. OK problem number one is...
Times Online (Free subscription) | 11/06/2009
A pioneering school is staking a claim to make its pupils among the most technologically advanced in Britain.
Technology Toolkit (Free subscription) | 11/05/2009
Wind turbines are used for several reasons but the main reason is to generate energy from the wind This may sound difficult but it is possible
Gizmowatch (Free subscription) | 11/05/2009
Scientists from the VTT Technical Research Center of Finland and the Helsinki University of Technology have developed a loudspeaker system, which unlike ever before, uses tiny aluminum wires suspended like a bridge between two supports to create a wide.
CleanTechies Blog (Free subscription) | 11/04/2009
A $400 billon (£240 billion) plan to provide Europe with solar power from the Sahara desert moved a step closer to reality with the formation of a consortium of 12 companies to carry out the work. Known as the Desertec Industrial Initiative (DDI), the German-led consortium consists of some of country’s biggest engineering and power companies, [...] Rating: 4.0/ 5 (1 vote cast)
übergizmo (Free subscription) | 11/04/2009
Want to have a method that your car can generate power as it drives along the road? Well, check out the Carbon Zero road block system. This concept uses blocks on the road, and as you drive over these blocks, the pressure from your car pushes the blocks down, creating kinetic energy. N-type silicon and P-type silicone work together like a battery, creating a DC-direct current. This energy is then...
The Guardian (Free subscription) | 11/01/2009
The German-led Desertec initiative believes it can deliver power to Europe as early as 2015 A $400bn (£240bn) plan to provide Europe with solar power from the Sahara moved a step closer to reality today with the formation of a consortium of 12 companies to carry out the work. The Desertec Industrial Initiative (DII) aims to provide 15% of Europe's electricity by 2050 or earlier via power lines...
Earth2Tech (Free subscription) | 10/30/2009
As utilities start to build large solar projects and solar power makes up an increasingly larger portion of the electricity mix, integrating this energy into the grid will be a challenge. Solar, like wind, is intermittent — power from the sun fluctuates when clouds pass overhead and wind doesn’t blow consistently. Now General Electric, which [...]
Climate and energy (Free subscription) | 10/30/2009
This could make electric markets a whole lot of fun. And what creates volatility, anyway? Some might argue that in part, it results from not understanding, tracking and managing the right variables. You can’t track everything, of course, and the unknown (especially the unknowns of nature) tends to make people edgy and reactive. Bingo, volatility. From [...]
DinoDirect.com (Free subscription) | 10/29/2009
Specifications: DC Voltage: 200mV-1000V ±(0.5％+1) AC Voltage: 200mV-750V ±(0.8％+3) Direct Current: 20mA-20A ±(0.8％+1) Alternating Current: 2mA/200mA/20A (±(1%+3)) Resistance: 200/2k/200k/2M/20M (±(0.8 %+1)) 200/2k/20k/2M/20M Capacity: 20nf/2uF/200uF 20nf/200nf/2uF/200uF (±(4 %+3)) Frequency: 2kHz/20kHz Inductance: 2Mh/20Mh/200mH/20H (±(2%+10))...
Earth2Tech (Free subscription) | 10/28/2009
The good thing about the Solar Power International show is that every year it’s packed with companies showing off the latest solar tech advances, like prototypes of cutting edge thin film material and lightening quick robots that can stack solar panels. That’s also the difficult part: the massive three-room show floor is stuffed wall-to-wall with [...]
Denver Post (Free subscription) | 10/27/2009
SMA Solar Technology AG, the world's largest maker of solar inverters, said Monday that it will locate its first manufacturing plant outside of Germany in Denver.
Seattle Post-Intelligencer (Free subscription) | 10/27/2009
DENVER -- A Germany-based solar company plans to open its first North American manufacturing site in Denver.
The Huffington Post (Free subscription) | 10/26/2009
DENVER — A Germany-based solar company plans to open its first North American manufacturing site in Denver. Gov. Bill Ritter and Denver Mayor John Hickenlooper joined officials from SMA Solar Technology for the announcement Monday. The company plans to start production next year with 300 employees and a capacity to expand the work force to 700. The plant will be in east Denver with access to...
The 3 latest articles published by users on Direct Current :
pradahandbag | 09/12/2009
Solar Car Battery Chargers Can Prolong the Life of Your Cars As environmental problems generate more and more concern, interest in using electricity and solar energy to power cars grows. In order to understand the solar battery charger , you need to understand how a car battery functions. A car battery stores energy and supplies...
helpliner | 08/25/2009
A home wind turbine is specially designed to be environmentally friendly and cost saving. With the existence of harmful greenhouse gases in our environment today, it is recommended to have one of these home wind generators to reduce the amount of pollutants being produced into our environment. A home wind turbine generates electrical power by spinning a generator. This generator is attached to the...
powerspike | 05/27/2009
Solar Power System If you are looking for the best use of alternative sources of energy perhaps you should install a home solar power system. Solar power has advantages and they include a clean source of energy; once installed in your home the syste...
Videos