i'm doing some design work for a 3rd world country. power infrastructure in these countries is limited. remember that many of these countries have not even had stable governments, let alone the infrastructure required to keep services in working order. whether the infrastructure is government owned or privately owned doesn't really matter, it's difficult to keep things working in a politically unstable environment. infrastructure also takes money to maintain, and many countries don't have the money to properly maintain what infrastructure they do have...
here in the US it took 30 years or more to get every house on the grid, up until 1968 or so, there were still AC-DC powered appliances being produced, and the Rural Electrification project began in the 1930's.
in the project i'm working on, i have to add solar and battery power options to the equipment that normally runs from a power line. not an easy task, but fortunately there are a lot more devices today that can do the job.
Yes But Inverters, Solar Cells and Batteries is NOT a Very Practical Solution.
Its Expensive, Needs Constant battery Up Grades and a Very LOW Efficiency.
Much more practical is a Parabolic Mirror or other Mirror Setups to Heat Water. Than convert that heat energy to electricity.
I'm Not Sure on How it Converts to electricity, But it is being done in numerous places now with quite good efficiency and lower cost than Solar cells and batteries.
Remove the HV Secondary winding of a 220 Volt Microvave Transformer.
(BE CAREFULL to NOT Damage the 220 Primary.)
Next, Wind About 25 Turns of 18 AWG Magnet Wire on it, to use as your New Secondary.
The Output will now come out of the Origional Primary, Which is Now your Secondary.
The ABOVE is Only an Approximation.
However with the Circuit you have, You will Definately NOT get more than a FEW WATTS.
My GUESS, Maybe around 10 Watts!
A microwave oven transformer is rated at 700W to 1000W which is probably much higher than your cheap little transformer.
But since a microwave oven is turned on only for a few minutes at a time then it probably also has a cheap transformer that over-heats if it is used for a long time continuously.
The datasheet for a 7809 shows a very important input capacitor and a very important output capacitor that you must add to prevent the IC from oscillating.
The datasheet lists a max allowed input voltage of 35V but 25V is recommended. Your transformer's voltage might be as high as 22V without a load then when rectified and filtered it will produce about 30V which is high but is fine.
Since your regulator burned then either you connected it backwards or it was a counterfeit one.
With no load a 7809 draws a max current of only 8mA. Its typical current is only 4.2mA. It has thermal shutdown so if it gets hot it will shutdown to protect itself.
or he connected 18Vac to the 7809.... that will let the smoke out quickly
Stancor (as well as many other manufacturers) makes a line of transformers with the name "Rectifier Transformer" right on the label, and 18V/7A, while it isn't on the first page i pulled up, is well within the output voltage and current range generally classified as a "rectifier transformer" which is a broad range of transformers used for open-frame regulated DC power supplies. the kicker here is that Stancor actually put a note on the page saying "(note: rectifier not included)"...
and this is what makes English one of the most difficult of languages.... the adjective comes before the subject. a "rectifier transformer" is not a "transformer rectifier" because the first implies that the transformer is designed to be used with a rectifier, the second implies that the rectifier is already attached to the transformer.... so a "rectifier transformer" has an AC output, and a transformer rectifier has a DC output.
i'm familiar with the term "rectifier transformer" because i had to find a replacement for a 24V/10A transformer that NCR used in some of their banking equipment. NCR wanted to charge our service company over $100.00US each for these when the original ones began failing. i was able to find one from Stancor for about $20.00 each with only a minor difference in the spacing of the mounting holes.
Since the kid "No Speeky Zee Engrish" very well then maybe he should not be here.
Maybe he connected his 7809 regulator to his 18VAC transformer without a rectifier.
ok, i have connected 7809 IC to transformer rectifier of 18V dc and 7 amp. (max), I have connected +ve supply of rectifier to pin 1 , gnd to pin 2 And output from pin 3.
The rectifier i am using is bridge rectifiers, I have not connected any capacitor to input and output side of regulator(7809) and as i connect the Supply(DC) temperature increases and IC burn out!!!!!!
ok, i have connected 7809 IC to transformer rectifier of 18V dc and 7 amp. (max), I have connected +ve supply of rectifier to pin 1 , gnd to pin 2 And output from pin 3.
The rectifier i am using is bridge rectifiers, I have not connected any capacitor to input and output side of regulator(7809) and as i connect the Supply(DC) temperature increases and IC burn out!!!!!!
The infrastructure development in India is far less than the developed country. India uses more than 70% of income for defense of borders.
the power shifting is done in so called "peak hours" when the electricity consumption is very high ( i think between 6 to 10 )
the 7809 will not burn out unless it's polarity gets reversed..
it's a very reliable IC with temperature compensation so you HAVE to filter the DC peculiarly because it's of higher amps rating.
the output must be interface with 3055 transistors mounted on proper heat sinks.
the thermistors are to be replaced with resistors. (assembled in a hurry)
I don't want to go into details but you know what I mean.
I am a westerner in Canada.
People in India look different, dress different and eat different then they even smell different.
They speak in about 23 languages that are completely different from Enlglish.
Their tiny little 3-wheel "cars" are different.
Their electricity barely works for only half the time.