PV Gap

Ray Said:

I am looking to install Solar in a house with five light points of 60 watts each, one elec. Fan medium fridge?

We Answered:

Go to:
http://www.solarhome.org/
or
http://www.wholesalesolar.com/products.f…

There are other vendors as well, with links on the site listed.

Your power demands are not great, at all, so you can probably buy a whole system that costs less than USD10,000.

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Ralph Said:

My teacher wants me to build an hydroelectricity powered something. What should I build?

We Answered:

The hydro electricity powered thing may be more difficult unles you have a steady source of water. You'll have to build something like paddle wheel attached to a motor that when spinning will generate power that you can use to turn on a small flashlight bulb or possibly an LED.

It would be much easier to get a small solar cell and use it drive a motor with a fan blade on it or a small light source. For example something like this:

http://www.sciencelab.com/page/S/PVAR/10…
http://www.enasco.com/product/SB33562M

This website has tons of solar stuff:

http://www.siliconsolar.com/educational-…

Sherry Said:

How do I connect surveillance camera that broadcasts on the Internet?

We Answered:

Linksys Wireless-G PTZ Internet Camera with Audio WVC200 - Network camera - pan / tilt - color ( Day&Night ) - audio - 10/100, 802.11b, 802.11g - DC 5 V


The cost is about $250.00

The Linksys Wireless-G Pan/Tilt/Zoom Video Camera sends live video through the Internet to a web browser anywhere in the world!The advanced MPEG-4 video compression produces a high-quality, high-framerate, up to 640x480 video stream. MPEG-4 encoding facilitates good video quality in varying bandwidth environments. WVC200 also supports MJPEG compression for video, providing good video quality at high bandwidth rates.The comprehensive video features include an IR filter cut which allow you to see the images in low or no light environments when an IR lamp is used. Snapshots (in JPEG format) of the image can be taken and saved. Snapshots can also be scheduled and sent to an FTP server.If you want the video to be visible from a remote location or from the Internet, you can open an appropriate port on the Router, and then create password protected accounts to manage access to the camera, or leave it wide open for the world to see. Support for Dynamic DNS lets you access your camera using an easy-to-remember "name", even while using a dynamic IP address. The Pan/Tilt and digital zoom function allows you to remotely control the camera movement and focus, giving you maximum flexibility remotely. Up to 10 simultaneous users can have access to the camera at any point in time. Software is included for multiple camera monitoring and recording to your hard drive with advanced search by time and date. Recording can be set up to record by motion trigger, manual or schedule recording and playback on Windows Media Player without the need for a proprietary player.You can also turn on Security Mode, which tells the camera to send a message with a short video attached to up to three email addresses whenever it detects motion in its field of view. You can then log onto the live video stream if the situation warrants. Wireless security features include WEP and WPA.


I'm not sure how you would get a 500ft range... Maybe with a belkin PRE-N router it says on the box says it will get up to 500,000( 5 hundred thousand ) square feet OPEN RANGE. ( Meaning not a lot of trees. )

I think if i am not mistaken that the max range for a wire to be run is 300feet. But i could be wrong so that would not work for you.

With a good router you should be able to get it to work.

As far as a power source you would have to use solar panel with a good size battery time.

Lorraine Said:

Physics Question with the speed of light?

We Answered:

Divide the 4.12 by the 3.00 = the number to the right of the "*"

=12.36

subtract the 8 from the 16 = power of 10

===>

12.36 * 10^8 seconds the units we started with

365.25 days/yr * 25 hr/day * 60 s/hr = seconds per year

You calculate I don't have a calculator

call it ? seconds/yr

12.36 * 10^8 seconds/ ? seconds = Years

Should be around 4 years