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Showing posts with label Technology. Show all posts
Showing posts with label Technology. Show all posts

DIY Solar Bag

Solar Bag recharges anything that can connect to a USB port. Solar energy is collected and stored in the battery pack while not in use. I use it to keep my power hungry cell phone and ipod running all day or in an emergency. You can buy these online for a few hundred bucks, but this one cost about $100 if you DIY.


The solar bag consists of a flexible solar panel, rechargeable Ni-MH batteries, and a few electronic components to tie it together.

The solar panel is a PowerFilm P7.5-150 producing 7.2V and 200ma in ideal conditions, more than enough to charge three nickel cadmium batteries.

Two circuits are used in this design. The first circuit employs a MAX639 step-down switching regulator to transfer all of the solar panels energy to the batteries as efficiently as possible. The second circuit uses a LT1302
Micropower High Output Current Step-Up DC/DC Converter to provide the necessary USB 2.0 power requirements. Both of these integrated chips are free from the manufacturer when you sign up on their websites.

All of the circuitry can be placed on a project board and fits into a small space. I found some garden solar lights on liquidation at Wallmart and it was easy to remove the existing circuit and incorporate my board into the design which evidently gave me a second solar panel which I can take out and place in a window when I'm indoors. With a full day of sunlight, enough energy is stored in the batteries to completely recharge my power hungry cell phone and ipod and I feel good about using renewable energy whenever I can.

The Risks of Lithium Technology (Part 2)

In Part 1 we examined the history and engineering behind Lithium battery technology and drew comparisons between alternative technologies in use today. In part 2 we will explore the impacts of Lithium technology on society.

Economics at the Wheel

All too often, social hardship triggers technological innovation.  So, it’s no wonder that despite the current global economic turn down, many remain optimistic of emerging lithium ion technology as a fitting surrogate to wean us from our oil dependency and usher in an era of sustainability. Since being introduced to the market in the early 1990s, production of lithium ion batteries has increased 4-5% per year resulting in a 6 billion dollar market as of 2008 [305].  At the same time, the conventional lead acid battery market, driven primarily by the automotive sector, is estimated to be a staggering 40 billion dollar industry by comparison, of which lithium is poised to replace.

Water Purification Tip For Campers

If you are going on a portage, you will have to bring along some form of water treatment to combat the ever increasing pollution entering our natural watercourse. There is always the tried and true way of using iodine tablets and boiling, but that's energy intensive and doesn't exactly produce the most potable water available using other techniques. Over the course of many decades, we've kept pace with the latest technologies and gadgets as they've progressed from water filters into certified water purifiers.

We have been using the First Need Portable Water Purifier for three years and it has been on at least a dozen back country portages. It has never broken down and we have been able to produce a 6 day supply of potable water for groups of 8 people using a single cartridge and the method below.

Before discovering the First Need Purifier we used pharmaceutical grade vaccine filters which I was able to get from work, but the principles are exactly the same. Use a set of small pulleys to hoist a container marked "Contaminated". Attach a piece of tubing to the inlet of the water purifier and another piece of tubing from the water purifier outlet to a second container marked "Potable" or something descriptive. Give the water purifier a few pumps and let gravity take over. Now you'll have more time for what's important and should be able to produce about 5 gallons of potable drinking water every 4 hours with little effort.

Update: Help Your Pets Make Better Choices

An earlier post Help Your Pets Make Better Choices left off by mentioning some ways of improving your pets drinking water. One of them was to begin filtering out suspended particles left behind after the aeration process. Having returned to the pet fish section at Wallymart for inspiration, a simple and effective solution comes from the same technology used to provide healthy aquatic environment for little Nemo: the Internal Filter.

In addition to providing aeration, the activated carbon filters help remove much of the suspended particles that we are targeting and all of the sediments and light particles left behind after visits to the bowl. The model we used is air driven and our air pump has two outlets so it fits in well with our existing setup. Keeping the bowl full improves efficiency and it's much easier to replenish a dish than wash it twice a day, healthier for your pet, and easier on the environment.



The next stage is to coordinate some lab time and start collecting samples and data to determine how effective this process is and for how long it can operate before the filter needs changing.

Five Solar Garden Light Upcycle Ideas

The sun is the greatest source of renewable energy we have and solar garden lights are a dime a dozen. So its no wonder, more and more people are finding useful second lives for these innocuous contraptions. Here are five amazing do-it-yourself projects that turn ordinary solar garden lights into cool eco-friendly gadgets you'll use everyday.

Before getting started, check out this great solar yard light deconstruction tutorial from Marshal Brian, founder of Howstuffworks.com, which clearly illustrates the parts, functions, and inner workings of a typical solar garden light.


1. Solar Powered USB Ipod/Cell Phone Charger
This Instructable shows how surprisingly simple it is to make a solar battery charger from very simple components. If you are looking for something universal, check out the video below from WonderHowTo.com showing how to turn an ordinary solar garden light into a renewable energy backup system for today's power hungry cell phones, Ipods, and gaming gadgets.



2. Bottle the Sun's renewable energy
Jam jars store jam, the Sun Jar collects and stores sunshine so that you can use it at night or to recharge batteries. Check out the Sun Jar from Suck.uk.com, then head over to Instructables for a step-by-step on how to bottle your own. If you have solar path lights and live in a cold climate where they don't get much use in the winter, this is an easy and efficient way to keep rechargeable batteries topped off and well maintained while not in use.




3. Architectural and decorative lighting
This is a simple thing you can do with a set of solar path lights to turn them into portable lanterns or retrofit existing outdoor lamp posts to use renewable energy. Here is another idea that uses the solar light circuit to suck every last bit of energy out of otherwise dead alkaline batteries before disposal. Makes a great night light.





4. Sports equipment
This simple project converts two solar garden lites and some PVC into a pocket sized LED solar powered lamps that can be used as a night/comfort light or reading lamp. The finished lamp is water proof, will float and will last virtually forever, making them great for camping. Modify a solar garden walkway light into a solar powered bike light that charges during day riding and can be turned on at night!



5. Renewable Energy Power Plant
This is a Solar Power Plant made from recycled parts. It is a work in progress that started at the landfill where you'll find all kinds of interesting electronics gadgets ready to be harvested for project parts. The cells charge a 12V car battery which is used to supply 120V through an off-the shelf inverter for light loads. Makes an excellent power supply for laptops, lights, or radios during power outs. Use it run an outdoor lighting system or plug it into this universal charger and turn in those crappy chargers that came with your gadgets for a more environmentally friendly, cheaper solution.

Winter is a good time to hunt for bargains on solar lights. When shopping for a solar garden light its a good idea to look for ones that have two or more AA Ni-Cad batteries and a photo resistor for detecting darkness. More batteries generally means the circuit can provide higher output for your projects and a photo resistor will allow you to incorporate light sensing into your gadgets if needed.

There are so many ways to hack a solar light and I've only mentioned a few. In an upcoming post I'll take a look at some additional ideas of incorporating solar lights with other off the shelf items to create even more interesting, functional, and eco-friendly gadgets. Thanks for stopping by.

Upcoming visit to world's largest hydraulic lift lock

I'll be attending a family reunion this week in Peterborough and although the schedule doesn't leave much time for work, there's no way I'm missing an opportunity to visit the worlds highest hydraulic lift lock and take in this engineering marvel.

According to Parks Canada Lift Lock 21 is the highest hydraulic lift lock in the world rising 19.8 m (65 ft). Moreover, the lock uses gravity and a cantilever to do all the heavy lifting. No external power needed! Stay tuned for more updates...


5 L.E.D. Projects Sure To Enlighten

As a Canadian I’m reluctant to admit we use more energy per capita than any other nation in the world and although we have plenty of cheap, renewable electricity, it’s wasteful, both in cost to the environment and the family’s budget. It’s true we’ve been making the switch to compact fluorescent (CFLs) from incandescent bulbs, but they still cost more than standard bulbs and contain mercury which is an environmental concern if not disposed off properly.

Light Emitting Diode (LED) technology, however, uses a fraction of energy compared to conventional incandescent or even CFLs. They last up to 50,000 hours, compared to 6,000 for a CFL or 1,000 for standard incandescent bulbs. LEDs convert more electricity into light, with very little waste heat produced, making them the most efficient lighting technology available on the market. Here are five eco friendly ideas with step-by-step instructions that shine a light on LED technology.

DIY Solar Lawn Mower

We all know that mowing our lawns with gas mowers creates an enormous amount of air and noise pollution. In fact the average gas mower creates as much air pollution as driving the family car on a 200 mile trip and we all know how annoying they sound when you are trying to sleep in on the weekend.

I was doing some research on solar lawnmowers, looking for somebody that’s hacked an old Sunbeam electric cord mower to run off solar power. Having endured ridicule from friends and neighbors long enough, I thought it was finally time to cut the cord for good and breathe new life into an otherwise great machine. What was I thinking! It turns out old green won’t be coming out of retirement without some serious retrofit, time, and money.

A much more elegant solution is to find a used battery powered lawn mower, and simply attach a cable for a solar panel to the rechargeable batteries. It’s less expensive or labor intensive and a project anyone can handle. This Instructable shows how to retrofit an electric mower with a solar panel for charging. Have fun!

Technology Without Risk

As the wheels of technology churn out exponentially complex systems designed to lightened man’s burden and propel society upwards and onwards, in turn much of society has little or no bearing on which direction we are heading or how far we may fall. We leap without looking, and while escaping the naiveté of our technological childhood, we have more recently become aware that the complexity and pace of the derived technology has resulted in an increasing frequency and severity of catastrophic disasters.

Consequently, while risk acceptance remains a social decision [1 45], the science of risk management which takes into account the actual risks and the general public’s negative perceptions of the risk stemming from a lack of faith in the political systems set up to fill the gap, whether they be technological or human, are diverging. This isn’t to say that technology and society cannot coexist without risk. It is this author’s and others belief that risks can be mitigated to acceptable levels, but the social perception of said risks must also be understood by all of the players for a proper assessment to be formulated and meaningful progress to take place.

Help Your Pets Make Better Choices

Almost everything animals do makes sense. So why is it pets drink from the toilet when they’ve got a perfectly good bowl of water at their disposal? It might just be instinct for choosing the freshest, coolest water available. Yet while the lavatory may meet their standards, there’s more we can do to help our pets make better choices and live longer, healthier lives.

One simple solution towards providing improved quality while minimizing effort is to aerate the water just like in a fish tank. Here’s all you need:
• 2W air pump
• Air stone
• Tubing
• Glass, porcelain, or stainless steel bowl

In our dog’s set-up, well water or tap water is dispensed from a water cooler we upcycled from the trash bin into a glass bowl which allows us to more easily keep it full and fresh. The air pump and air stone in the glass bowl do a couple of things in addition to make it more interesting for your pet; aeration, oxidation, and lower BOD.

Aeration scrubs gases from the water and removes any stale taste and odor. Furthermore, when air is mixed vigorously with water, impurities such as iron and manganese become oxidized and fall out of solution more easily. BOD (Biological Oxygen Demand) is a measure of the amount of oxygen being consumed by organic and inorganic matter that accumulates from drool, food particles, and whatever else lands in the bowl. Aeration brings more oxygen into contact with this matter which in turn accelerates its decomposition and subsequent removal. Nonetheless, despite all the agitation and chemical reactions taking place, some matter remains suspended in the water which can't be removed by aeration alone.

All this is to say, it is necessary to monitor the set-up and clean everything once and awhile. When the water becomes turbid, discolored, or cloudy, it's a sure sign things need cleaning, so gauge the set-up and don't wait for it to happen. More testing is required to determine average numbers on how long a bowl of water can go before cleanings, explore the use of different food additives as coagulants that will help remove the remaining suspended particles mentioned earlier, and look for ways to incorporate filtration into the concept and extend the time between cleanings.



Meanwhile, our dogs and cats approve and I know they're getting a better quality of water throughout the day. They’re drinking more readily and seem to have given up on the bathroom as a source of water. What's more, you don't have to worry about sitting on drool in the middle of the night if you still haven't eschewed leaving the lid up!

On a side note - Quebecer's enjoy the third-lowest electricity rates (5.45¢/kWh) in all of North America and the air pump consumes 2W. So it only costs us about 0.95¢ per year to run continuously. The water cooler, however, consumes 100W and costs about $50 per year. Leave it unplugged, since the water in the bowl reaches room temperature quickly anyway.

If you’ve got some ideas for improvements, questions, or comments, I’d like to get your feedback.

The Technological Blind Spot

Can Progress Exist Without Technology
While most would argue progress cannot exist without technology and point towards obvious anecdotes such as longer life expectancy, higher standard of living, and greater freedom to endeavor, all due in large part to the industrial revolution[1 34], it would be without regard for the innumerable human and environmental suffering sustained. The original aspirations society holds for technology at its roots; to free man from himself and nature, does it justice for a time as is evident by the advancements in medicine, information, and the freedoms afforded to pursue personal goals of Western society; the forebears of technological revolution. What is fundamentally different in the West today, however, is that these lofty goals have been supplanted with a hegemonic notion of technocracy as the self perpetuating means to progress [1 37]. Moreover, the complexity and breath of technology as Karl Marx observed [2], creates an inability to comprehend, let alone act upon the technology, resulting in what Heidegger more recently called the “technological blind spot” [3 21] which limits a society’s ability to fully understand the risks and benefits of the science at hand.

One simply has to ask similar questions our enlightened forefathers did to remedy this short sightedness. In the modern context, the question of longevity for example: If society relied less on the trappings of the modern world, instead sought holistic and spiritual anecdotes, or held a higher regard for natural systems, could we live just as long and be healthier? Perhaps a cleaner way of life, free from the stresses of a modern world holds the key to our health, happiness, and our progress. Nonetheless, it is big carrot to avoid when the medical community makes claims that we are decades away from cheating death altogether.

Similar questions, although not new [1 40], are once again becoming the focus of social debate, which call into question the impact of technology on society and the progress it more frequently suffers from. Perhaps a step back before we take two steps forward is a pragmatic view the technocrats are slowly learning [1 41] from its detractors.

The Role of Society
The will formed by economic, political, religious, and other social groups influence the role science and technology play in society. By the same token, the dissemination of science and the technology that follows, transforms social structures, behaviors, attitudes, and so on. “Conceived by man, technology eludes his control only in so far as he wants it to” [5]. In this sense, society defines technology by which inventions it chooses to use and develop in preference to others. Society is in essence the moral compass of technological progress. It is through the opinions and attitudes formed by society that technology finds it’s course. However, as the wheels of progress gain momentum and the complexity of the technology at hand increases exponentially[4 15], society may find it increasing difficult to affect meaningful change other than reacting to unanticipated calamities brought about as a consequence.

Another wrinkle in the fabric of technology is the opposing views of knowledge. The positivist see knowledge as objective and falsifiable, while social constructivists see it as subjective and open to human interpretation [4 18]. As a consequence, our attitudes towards technology are often times viewed from different perspectives. To gain a full understanding of the technology, Pool argues, we must “marry the positivist and social constructionist perspectives” [4 20] as the consequences of said technologies carry with it both the engineering and social attitudes.

Conclusion
History is replete with examples of technological progress and innovations breeding unanticipated or unwanted side effects, however, as we have seen we are too often powerless to affect them. The Industrial Revolution, while reducing manual labor, had and still has many negative consequences such as environmental degradation, stress related illness, and an inability to effectively realize better alternatives. Einstein observed that the splitting of the atom had changed everything, except mans way of thinking, whence we are destined to catastrophe. But mankind still has the ability to change their actions if not their thoughts. The challenge remains for society in its abilities to harness technology for the present while looking to the past for a rationalization and balancing its needs for the future if we are to progress. Is society progressing because of technology? Most likely, but do the machines we create push us in the direction of progress or is the human race simply becoming a more important part of the machine?



[1] Marx, Leo. Does Improved Technology Mean Progress. Technology Review. 1997.
[2] Marx, K. & Engels, F. (1848), The Communist Manifesto
[3] Ronell, Avital. David, Diane. The ÜberReader. University of Illinois,2007
[4] Pool, Robert. How Society Shapes Technology. Oxford University Press,1997.
[5] Salomon, Jean-Jacques. The uncertain quest: science, technology, and development. New York: United Nations University Press,1994.