A very serious electrcity problem may loom.
LED home lighting may be in our future?
----- Forwarded Message -----
From: bpayne37@comcast.net
To: jvanloon@bloomberg.net
Sent: Friday, April 16, 2010 11:39:20 AM GMT -07:00 US/Canada Mountain
Subject: harbor freight and aarp
Hello Mr van Loon,
Coupons clipped from April 2010 AARP Bulletin.
Harbor Freight has given coupons for free 9 LED flashlights to 40 million readers!!!
April 16 (Bloomberg) -- China, the biggest producer of greenhouse gases, vowed to “vigorously” develop a cleaner economy by using energy more efficiently and investing in research and development projects to cut carbon emissions.
http://www.prosefights.org/scriptpollute/chinasolar/lights/lights.htm bill
GE Fast Forwards to Future of LED Lighting.
Will The 2010 LED Shortage Lead To Feast Or Famine? is
another example of the electronics industry hitting the panic button on
increased electric demand it has helped cause.
Look for PNM load
forecaster Steve Martin foil in
PNM work proposal. Martin identified the causes of
increased electric load demand in New Mexico.
We contemplated using a 20% coupon to buy a third solar panel to measure the variations in power and voltage output between them. But we decided against this for the reason similar to mathematical induction.
3 panels gives no more extrapolation information than two. So we instead decided to get another 4 pack of 9v thunderbolt batteries ... and use another coupon to get a free 9 LED flashlight.
We put the 20% off coupon on top of the battery back and the free flashlight on the counter.
Coupons clipped from April 2010 AARP Bulletin.
Harbor Freight has given coupons for free 9 LED flashlights to 40 million readers!!!
April 16 (Bloomberg) -- China, the biggest producer of greenhouse gases, vowed to “vigorously” develop a cleaner economy by using energy more efficiently and investing in research and development projects to cut carbon emissions.
The clerk bar code scanned the battery pack and coupon, then scanned the free flashlight coupon.
We paid the money and got blue anodized flashlight.
All very factual. Nothing to argue about. We will use the same procedure to try to get our stolen $22,036 back.
We think the reason Harbor Freight is giving out free 9 volt flashlights is to show the public how easy on batteries LED flashlights are.
Six free flashlights have been obtains, so far. Photos of four can be seen in 2k ohm resistance multimeter check.
Two given to two grandchildren.
Here's our LED supply.
Let's see if our solar/electric lash-up can illuminate one or more of these.
Here is a precision 2k ohm resistor from our passives library.
Magnified 10X, then resized to 800 pixels.
See green LED just below #4 dial We're generating solar
electric powered light with only 5.35 volts panel output.
Here is our precision passive library.
We may need to obtain a greater electric load now that we think we know that solar generation of electricity can produce considerable watts/sq m.
Incandescent bulbs dissipate considerable heat.
Simplest large load possibility is trying to drive an incandescent
electric light with solar. Incandescent bulbs dissipate a lot of heat. Like 10
100 watt bulb dissipate 1 kWh = 3413 BTU in one hour.
We measured the
resistance of 25, 75 and 100 watt bulbs.
Should have been not working out.
light bulb resistance temperature.
so i've a lightbulb that says 60w 230v so i figure it draws 60/230 amps
so i figure its resistance is 60w/((60/230)^2), which gives me 882 ohms
so i checked this light bulb with a multimeter and it reads 65 ohms!!!!!
so i figure that at its "operating temprature" the resistance increases to around 880 ohms? is this correct
....
Exactly correct on both accounts! A common tungsten light bulb filament runs at 2800K, for a resistance ratio of about 15:1 according to http://hypertextbook.com/facts/2004/DeannaStewart.shtml This is close to the ratio you observe.
I've never heard of such a cheap multimeter, must be used, yes? Figure its accuracy is inversely proportional to its price divided by the new price of a good one... :o)
Constant resistance is needed if we exceed to 10 to 20 watts in our current solar/electricity layout.
Little $1.99 red CEN-TECH #2 was first used to measure resistances using 200 ohm scale.
Accuracy concerns about #2 caused to repeat the measurements twice using the Soar.
The Soars hogs power so solar panel meters were redistributed and #2 included with three checking meters.
Meter #3 replaces Soar for measuring panel voltage.
Note #2 with red on/off switch. #2 appears to now agree to 1 or 2 /100 volt with #1, 4, and older little yellow CEN-TECH.
9 LED flashlights driven by 3 AAA batteries are being distributed by Harbor Freight free.
Solar-generated electricity from our panel will drive these flashlights with ease.
Purpose of the free distribution may be to get the public ready for LED illumination to replace cfls?
Low current combined with high luminous output LED and solar-generated electricity appear to be compatible technologies. Solar-generated and incandescent bulb are not compatible technologies.
How is LED brightness related to current?
