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Discussions

Solar panel and motor: Any way to regulate the power transmission? by striff Q: I'm an engineering student and for an individual hobby-like project i purchased a small solar panel and a small solar motor. I am planning on making a small solar powered toy car. The question i have is: is there a way to connect a control or some other ways of regulating the power that is absorbed by the cells? Other wise the motor will just continue to run. Any answer would be greatly appreciated. Thanks!

A: I assume it is a DC motor. You should have DC voltage coming out of the solar cell (For example 10V). You could use a transistor to switch the voltage on and off, then filter the output with an RC filter. You will have to choose the right RC time constant . It will have to be slower than the control pulse frequency, but faster than the desired motor response time. If you switched the voltage with a 50% duty cycle, then filtered the output, you would get 5V, with a 75% duty cycle, you would get 7.5V, etc. Therefore, you could control the motor by controlling the duty cycle of the switching. A microcontroller like the BASIC Stamp can produce the control pulses.

Could Solar Power work more effectively if the solar rays were magnified? by Nohbdy Ahtall Q: If we focused the sun's energy like a magnifying glass does into the solar panels, would this generate more power at all?

A: No, it would not. If the magnifying glass is the same area as the solar collectors, then it would be the same amount of energy the solar collectors would be gathering without the magnifying glass. In a way it would be cheaper, using cheap mirrors to focus the sun's rays onto a smaller solar collector surface area. And solar collectors are far more expensive. But as to more power? No.

How can I make my own solar panel and produce solar power electricity and green energy? by Q: Solar Power Electricity will save you thousands of dollars while keeping the planet safe and pollution free. By building you own solar panels you will not just generate solar power electricity that saves you money, but you will feel a total sense of satisfaction.

A: here's some useful info about solar panels, hope it helps. http://www.renewables-info.com/renewable_energy_info/solar_panels_info.html

How exactly do wind and solar power companies make their money? by William M Q: I only invest in small-cap energy based companies like oil, gas, petroleum, and more recently, wind and solar power. What I would like to know is how exactly do wind and solar power companies make their money? Please, I'd like to understand the industry a bit better. Thanks!

A: Your question is fairly general. Perhaps you would like to read these introductory articles and then post more specific questions: http://en.wikipedia.org/wiki/Solar_power http://en.wikipedia.org/wiki/Wind_power ---------------------

How to get solar power continuously and without any interrupt? by java_user Q: Gas prices are bound to increase , I think will never come below $4. Only solar power is the guaranteed clean,affordable ,low prices alternative option.Only problem is it is not available at all time, Can we build a system that can be placed above the clouds and supply us the solar energy on the ground continuously? Any thoughts?

A: "Only solar power is the guaranteed clean,affordable ,low prices alternative option." Clean? How are they manufactured? Affordable? Why don't we all have them? Placed above the clouds? Hmmmm.....would this increase the cost? Does it get dark above the clouds at night? Keep thinking! Check your facts, Mr. 357. Listen to "Dark Side of the Moon" by Pink Floyd. Especially the very end.

How many solar power towers are there in the world? by Taverealla Q: I'm doing a project on solar power towers. But, I have a hard time finding information on the amount over the internet. So, how many solar power towers are there in the world? I'm looking for any solar power tower, not only commercial power towers.

A: No body knows. New ones are being built all the time. There is no central data base that keeps track of such projects.

What kind of solar power setup would I need to power a single room's energy needs? by D. Christopher Q: I live in the basement of a house and would like to run my room on solar power. I have two power strips that run a TV and DVD player, a laptop, printer and two external hard drives and I would need to use a couple floor lamps in the room as well. What kind of solar paneling setup would I need and what would be the ballpark cost on this?

A: Let me just say, the cost would be too much to be worthwhile. It appears you would need at least 750 watts. if you wanted to use the electrical things at night too, the system would have to deliver that much power for the equipment, and more to charge the batteries. Make it a total of 1500 watts, and you would need between 10 and 15 panels, plus an inverter, mounting rails for the panels, two fused disconnect switches and wire. I expect around $10,000 or more.

Solar Power? by Batman Q: Hi, I have some questions about solar power, it's for a school project. Thanks for all your help in advance. What is solar power? How does it work? (Please be as specific as possible and list details) What is solar power used for? (A list would be great.) How efficient is solar power? How cost efficient it is? What are the advantages and disadvantages? And anything you find important to share would be greatly appreciated. Thanks.

A: Solar power refers to the utilisation of the sunlight for meeting our energy needs, which are otherwise met by electricity or coal, oil, gas etc. There are several ways for utilising solar power: - photovoltaic cells for producing electricity (very expensive to set up but maintenance free) - solar water heaters very popular in several countries to produce hot water - solar cookers for cooking food Solar power is environmentally very clean - no carbon dioxide, no radiation, no health hazards etc. but it is very expensive right now.

solar power? by njpaypal Q: I want to make a solar power generator for ac use not dc use, how long will it last if iam running a total of 1600 watts ? I was planning on making one with 8 batteries. thanks any websites that explain this would be greatly appreciated.

A: The question is not too clear, as solar chargers are in fact d/c power as is the batteries they charge. To get a/c power from the system you will need an "inverter", and they come in various sizes, watts that is. The amount of time will also depend on the batteries used, as they are all not the same. Reserve amps will be the determining factor to look at. There is a formula published by the makers of these inverters that will give approximate running times, and most can be found through Google under the manufacturers brand name.

Solar power? by melaniecampbell Q: We are looking at buying a house and renovating it, and were wondering about using solar or wind power to power much of our house. We will have a well, be on a septic system, have a wood burning furnace for heating the house, so we would like to have solar or wind power so we can use as little electricity as possible (its insanely expensive here!). We also have our appliances (fridge, stove, washer, dryer, freezer). How much would a basic set up be for a 900 sq ft, 3 bedroom house? For either wind turbines or solar panels and necessary equipment? I am in Southern Ontario. Thanks!

A: Go to canadiantire's web site and search solar panel. they range from $30 -- $1000

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