I really like this comparison. I can't take credit though, it was used in the article I read about a trend toward Edison's exposed element bulbs in restaurants and other locations looking for a certain ambiance. The problem is that they are energy hogs. If they are truly being used as decoration and not in mass quantities, this might be OK, but the decorations are usually strings of the lights in large quantities.

From another article:

...they hover in groups of two and three. ...they snake through the cafe, restaurant and patio. ...they cluster near the entrance as an enticement. ...their antique glow has spread like a power surge.

In the US, the last major producer of incandescent bulbs is GE and they are set to close the line later this month. What do you think, will they find a way to hang on the way traditional fireplaces have?

The above image is an Arduino micro controller board with a piggy back board known as a shield that is designed for data logging. Also there are two custom boards I personally made for hooking up renewable energy sources. Click the image for a bigger view.

If you know me or read my blog periodically, you probably know that I have been working for several years on a renewable energy project. What you may not know is how close it is to being available on the market. The current prototype is outperforming everything I can find in a similar cost category. The real trick is the length of time for the comparison sample. I can only sit with a video camera and stopwatch so long. I am also prone to mistakes occasionally, being human and all. That's where the Arduino comes in.

The Arduino is a real multitasking geeks dream. This little circuit board is equiped with an ATMEGA328 processor, a sqeek of memory and is designed to be easy to program and easy to hook up to the real world in the form of switches, sensors, meters and anything else that can have electrical interaction. If you really want to learn a lot about it, go to www.ladyada.net. I highly recommend buying one from them if you are interested. Make any follow up units from scratch, but there is so much involved I highly recommend the first one is assembled and tested before you play with it.

I have worked with an open source set of "sketch's" , this is what an Arduino program is called, and combined them to work with my particular needs. The above Frankenboard is ready to record power production for 3 renewable sources such as wind and solar and collect temperature and light value at the same time. I don't need extreme resolution, so it will take a reading from all sources every 3 seconds and time stamp each reading down to the second. Later I will use a plotting software program to see the comparison. I intend to gather a week or more, maybe a month as a good representation of real world conditions.

Someday soon I hope to officially announce my wind turbine here.

Another good source for Arduino stuff is at the related link below.

Age is relative, so the answer to the question is really up to you. Here I will share a little history about solar power.

The photovoltaic, (solar electric), process was discovered in the late 1800s and the creation of some primitive solar cells followed. In 1921 Albert Einstein received the Nobel Prize in physics for his work on the photoelectric effect. Russell Ohl patented the modern junction semiconductor solar cell in 1946 and by the 1950s the first true solar photovoltaic panels were at work. This makes solar panels for generating electricity about 60 years old.

There have been a few flavors of solar panels, monocrystalline and polycrystalline being the two most common right now. The monocrystalline typically has the highest output per surface area while the polycrystalline trails behind a few percent. The difference in production cost makes polycrystalline a better value in cases where lots of space is not an issue.

Some common abbreviations and terms you hear when talking about solar power are described below:

KW = Kilowatt (1000 watts)
kWh = Kilowatt hour (1000 watts for an hour)
MW = Megawatt (1000 Kilowatts)
PV = Photovoltaic (turns photons into voltage - electricity)
DC = Direct Current (like the battery in a flashlight or phone)
AC = Alternating Current (like the walls of your home)
Inverter = Device that takes DC and converts it to AC
Watt = Measure of energy or work
Insolation = measure of energy in sunlight at a specific spot
Shade Structure = Like a big patio cover, but with solar panels
Array = a group of solar panels working together

In Concord CA, our average insolation is 1430 hours per year. This means if you want to install solar for your home in Concord CA, a 1000 watt panel will make 1430 kWh per year.

As this information could go on for quite a while, I will stop here with what I feel is most relevant for the moment. :)

Wikipedia has a lot of good information too.

In California, there are 4 school districts starting a test program for electronic text books. I have written about and talked about this before. However, the rather expensive iPad has been chosen by the guys on the hill as a pilot device for this study.

In my own plan, the kids would be issued something more like a Kindle $300 or less and allows note taking and all the qualities of an actual textbook as well. The plan would include assigning the device to kids in 1st grade and it is theirs for the duration of their education in the district. If they leave the district the device stays, and if they graduate high school in the district, they keep the device. That was my plan.

The CA board of education feels the iPad is a good answer for this same problem. The addition of full color and video help is definitely understandable. My fear is that the device may lend itself to many other uses and will not be given the respect of a textbook. I feel that perception can also be very important when teaching or learning. A device capable of video games and other entertainment may spend too much time doing those things in the hands of immature users, our target audience.

The following is from the article:

Education firm Houghton Mifflin Harcourt has teamed up with California Secretary of Education Bonnie Reiss for the pilot, which will take place at Long Beach Unified School District, Riverside Unified School District, Fresno Unified School District and San Francisco Unified School District.

"This is a seminal moment. It marks the fundamental shift from print delivery of curriculum to digital," said John Sipe, vice president of K-12 sales at Houghton Mifflin Harcourt.

Students randomly selected for the program will receive iPads loaded with digital versions of their textbooks for the coming school year. Their progress will be tracked and compared against that of their classmates using traditional textbooks to determine the potential benefit of a switch to digital technology.

Students with iPads will have instant access to more than 400 videos from teaching experts walking them through the concepts and assignments, rather than having to rely on the teacher's explanation in class. There is also a homework coach and animated instructions on how to complete assignments.
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To read the whole article, follow the related link below.

Associate Professor Michael Strano (left) with graduate student Ardemis Boghossian and postdoctoral fellow Moon-Ho Ham, in one of the labs where they and their team developed the self-repairing PV technology (Image: Patrick Gillooly)

It has been a while since my last post. I have been busy with site walks, vacation (needed), and communications regarding the district solar project. The pace will pick up again very soon. We are now in the process of evaluating the proposals set forth by the participants.

On the same subject, solar power, there has been some technology news. In the above photo you can see the people directly involved with a breakthrough that may someday change solar power for everyone. Self repairing solar panels may become a reality thanks to their hard work.

A very significant problem with solar panels is the breakdown of the material over time. As panels age, they simply don't work as well. If the material were to "self repair" the efficiency would theoretically be the same forever.

Another big step will be self cleaning features. Solar panels produce the most when the light can hit them directly. If there is a layer of dust, the production drops significantly. Large installations like the one we will be installing will have a cleaning and maintenance contract built in to the cost and return on investment model.

For more information on the new breakthrough, follow the related link below.