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Wednesday, June 29, 2016

Thermoelectric Fan Powered by Heat

It is also called a peltier element and when you use it as a generator it's called seebeck effect. You have one hot side and one cold. The module generates power to drive a motor and the motor fan/air flow will cool the upper heat sink. Higher temperature difference => increased output power => increased motor RPM => increased air flow => increased temperature difference and so on. The airflow will spread the heat into your room, which is the purpose of this construction.

If you unmounts the basement you could also use it as a stove-fan or move air from other heat sources. The motor start to turn at about 15 degrees difference, which to my surprise worked when I just went outdoors with it and the upper heat sink got cooler than the basement. You can place it in hot water, on an ice cube, a pizza and it works just as fine.

Total cost was about 50€ (incl. shipping costs). I used some spare parts but I bought most of it.

Components used:
• CPU-cooler (cold side): Zalman CNPS5X (Base plate: 33x33mm)
• CPU-cooler (hot side): From an old PC (WxLxH=78x63x67mm)
• TEC-module: TEC1-07110T200 (30x30x3.3mm)
• DC Motor: 1,5-3V
• USB-fan (metal, only needed the fan)
• Thermal paste: Arctic MX-4
• A piece of wood
• Two pull springs
• Four M4 bolts and two M3 bolts
• Aluminum tubes (optional)

TEC specification (at ΔT=68C):
Vmax: 8.5
Imax: 10
Qmax: 52.7
Tmax: 200 degrees Celsius

First of all, it does not need to be exactly those components. Other heat sinks, TEC/TEG, motor, fan, thermal paste, bolts and base plate can be used. Main concept rules are:

  • A TEC or TEG module (smaller dimension than upper heat sink base plate). Specifications are not that important but make sure it can handle high temperature. Many modules are only 100 degrees C and then you need to modify the construction as it gets warmer than that.
  • One hot side that is not hotter than TEC max-temp (My candle flame never touches the surface)
  • One cold side, an efficient heat sink (heat pipes) are a good choice
  • Good thermal paste to maximize temperature difference
  • Low voltage motor, around 1V. I prefer it to be quite (low dB)
  • Fan with high air flow at low RPM
  • Base plate that adds stability, holder for light, isolate heat

The lower heat sink (hot side) was cut and polished to get it nice looking. I kept 5mm of the fins to absorb the heat well when the light flame burns and increases distance to the surface. New dimensions are 78x63x15mm. 4 holes are drilled through the heat sink and threaded as M4. 4 bolts will hold the lower heat sink on top of a wooden platform. Bolts go through the platform from below, covered with aluminum pipes for a better looking design and are screwed into the heat sink. The distance between wood and heat sink is 35mm but I would make it 40-45mm as the flame almost touches the surface. You don´t want that because it creates black soot. The lower heat sink gets really warm but at the same time it works as a cooler to not get TOO warm, that would melt the TEG-module.

Two springs attached to M3 bolts fixate the upper heat sink on the lower, with TEC-module and thermal paste in between. Both surfaces of the TEC are covered with a thin smooth layer of thermal paste. The springs adds pressure as well as isolate the heat to travel to the cold side. The upper heat sink could also be screwed into the lower heat sink but then you need isolated screws.

The TEC is directly attached/soldered to the motor and the motor is attached to the upper heat sink by another small piece of metal and a cable tie. The fan is attached to the motor with a small belt wheel and glue.

I think the hot aluminum part get to about 100-150 Celsius, I measured the temp with a grill thermometer covered in thermal paste but can´t tell how accurate it was. I measured 0.4V and 0.25A with one candle and 0.67V and 0.54A with two. That results in 0.1W resp. 0.36W output power. The efficiency to produce electricity this way is not that impressive though. A candle produce about 25 Watts, that means 0.7% efficiency.. But who cares, everything this machine does will eventually end up in heat any way =) That is a bit interesting, you increase the room-heating speed (I think) but looses nothing..

It is a bit noisy to have running all the time. To find the optimal motor/fan => airflow/noise level will require some more experimenting.

Mod Proposals:

  • Skip the base platform and bolts and use it as a stove-fan.
  • Use two/four TECs side-by-side to multiply output power. Add a 5-10mm thick copper plate that covers all modules and then place the CPU-cooler on top of that.
  • Use a brushless DC motor and a suitable fan to make it noiseless.
  • Build in a slow motor beneath the platform to make the whole thing spin 360 degrees.
  • Put wheels on the platform.
I have changed the motor to a "Tamiya 76005 Solar Motor 02 (Mabuchi RF-500TB)". Got it on Ebay. It´s incredibly strong at low RPM and I give it only 0.5V. A very good motor, but best of all, it´s quiet! I cannot hear it at 2m distance at full speed. It also gives stronger air flow. Now I can run it all time =)

Tuesday, June 28, 2016

Low-cut dresses dramatically boost women's job application chances

"Wearing a low-cut dress in a job application photograph dramatically increases a woman's chances of receiving an interview, new research has suggested.

A study due to be unveiled at a world-leading conference starting in London tomorrow (Tuesday June 28) showed female applicants were 19 times more successful in securing job interviews when pictured in revealing clothing rather than more conservative dress.
The research carried out in Paris found that women stood a much greater chance of earning job interviews for both sales and accounting roles."

மானிப்பாய் என்ற ஊருக்கு பெயர் வந்த வரலாறு

இற்றைக்கு 2000 ஆண்டுகளுக்கு முன் இலங்கையும் இந்தியாவும் இணைந்த நிலப்பரப்பாய் இருந்த வேளையிலே வனவாசம் செய்து கொண்டிருந்த இராமர் சீதையின் அருகில் அழகிய மான் ஒன்று உலாவக்கண்டு மையல் கொண்ட சீதை அதைப்பிடித்துத் தன்னிடம் தரும்படி நாயகனை வேண்டிநிற்க தன் மனைவியில் கொண்ட காதலினால்; இராமர் மானைத்துரத்திச் சென்றார். அந்த மாயமானும் இராமருக்கு போக்குக்காட்டி ஏமாற்றிக்கொண்டே பாய்ந்து ஓடுகிறது. களைப்படைந்த இராமபிரான் கெஞ்சும் குரலில் மானிடம் வேண்டுகோள் விடுக்கின்றார்.
”மானே நிற்பாய்” என்பதுதான் அந்த வேண்டுகோள். மானே நிற்பாய் என்ற இடம்தான் மானிப்பாய் என்ற ஊராகும். அந்தவேண்டுகோளை விடுத்த இராமன் மானை நோக்கி அம்பினை எய்தார். அம்புபட்ட மான் அம்பெய்த இடத்திலுருந்து ஜந்து கிலோ மீற்றர் தொலைவில் இருக்கின்ற இளவாலையில் விழுந்தது. மானாக வடிவமெடுத்து வந்தவர் இராவணனின் மாமனாரான மாரீசன். எனவே மான் விழுந்த இடத்தினை மாரீசன்கூடல் என இன்றும் அழைக்கப்படுகிறது.
இராமன் அம்பெய்துவிட்டு சீதையை நோக்கித் திரும்புகையில் இலக்குமணனை சந்தித்து இலக்கமணனோடு சீதையை விட்டுச்சென்ற இடத்திற்கு வந்து கொண்டிருக்கும் பொழுது சீதையை இராவணன் தனது புஸ்பக விமானத்தில் ஏற்றிக்கொண்டு இலங்காபுரிக்கு திரும்பினான். இராமனும் இலக்குமணனும் இந்தியாவிற்குள் நுளைந்த பின் இராவணன் தான் சிவனிடம் பெற்ற வரங்களின் சக்தியால் பூகம்பத்தை உருவாக்கி இலங்கையையும் இந்தியாவையும் பிரித்தான்.
இராமனும் இலக்குமணனும் சீதையை காணாது சடாயு மூலம் இடையில் நடந்த சூழ்ச்சியை அறிந்து பின்னர் சீதையை மீட்கவே இலங்கைக்கும் இந்தியாவிற்கும் இடையில் அணையிட்டு இராவணனைக் கொன்று சீதையை மீட்டான்.
இராவணனை கொன்றபின் அந்த தோசம் நீங்குவதற்கு திருக்கேதீச்சரம் காரைநகர்ச்சிவன்கோவில் யாழ்நகர்வில்லூன்றிப்பிள்ளையார் ஆலயம் போன்ற இடங்களில் பூசை செய்தார். இவ்விடங்கள் எல்லாம் ஆலயங்கள் உருவாக்கப்பட்டு இன்றும் வழிபடப்படுகின்றன. ஆனால் மானிப்பாயில் ஆலயம் அமைத்து பூசை நடைபெறாவிடினும் முதன் முதல் இலங்கையில் இராமபிரானின் பாதம் பட்ட புண்ணிய பூமிதான் மானிப்பாய் ஆகும். மானிப்பாய் என்ற ஊருக்கு பெயர் வந்த வரலாறும் இதுவாகும். 
பிடித்திருந்தால் ஷேர் செய்யுங்கள் 

Monday, June 27, 2016

Georgy Kurasov Paintings The borderline existence

Georgy Kurasov was born in 1958 in the USSR, in what was then Leningrad. He still lives and works in the same place, but now the country is Russia and the city is called St Petersburg. Without any effort on his part whatsoever, Georgy seems to have emigrated from one surreal country to another.

His native city was irrational from the very moment of its foundation. Situated on the same latitude as the southern shores of Alaska, on the swampy delta of the River Neva where no one had ever settled before, this new capital city grew up on the very edge of a monstrous empire. 
Here on the totally flat surface carved across by rivers, streams and canals, European architects laid out, like images on a canvas, straight avenues, streets and squares, they built Greco-Roman porticoes and Baroque palazzi, erected sculptures and fountains, amidst something akin to permafrost where half the year is dominated by ice and frost and the other half by damp and rain.
It is hard to find a more artificial – more artistic – city.

Georgy spent his childhood on the Petrograd Side, to the north of the city, in a tiny little flat with windows that looked out onto an even tinier courtyard. As far as he recalls, he modelled things in plasticine and drew resting on the vast wooden windowsills. Not so much aesthetic pastimes as compensations for the grey minimalism of everyday life, the absence of light and bright colours. 
At thirteen years old his mother put him in the art school attached to the Academy of Arts. At the interview it was politely explained that there was nothing for Georgy in the painting department since he had a total lack of feeling for colour. So they suggested Georgy Kurasov join the sculpture class.

In some way he was pleased, since all the painted images they showed him seemed terribly boring, and Georgy had great interest in form.

That was when he began his professional training.

In 1977 Georgy Kurasov entered the sculpture department of the Academy of Arts.
He spent six years in the vast studio of a building erected during the time of Catherine the Great, in the late 18th century. Those gloomy, narrow, incredibly high vaulted corridors, the vast, cold, grimy studios, everything was inhabited by the ghosts of long dead masters of ages past, whose influence was far more real than the insignificant apologists of Socialist Realism and of Marxist-Leninist aesthetics. The Academy was a solid amalgamation of temple to and prison of the arts. 
Yet those years in the Academy were the best years of his life. Nearly all Georgy’s friends and colleagues date from those years.

The circles he moved in were intellectual, talented, young – which meant free, with the exception of the one or two informers that were simply an obligatory element of life in those years and did little to alter the overall picture.

It was then that Georgy met his wonderful Zina, who was later to occupy nearly all his space, both physical, in his life, and creative, in his works.

Almost immediately after his diploma Georgy Kurasov was called up for army service, but even there he was armed not with a rifle but with paints, since he was lucky enough to be appointed Court Artist to his general.

In 1984 Georgy Kurasov was at last demobbed. He was free. 

Over the next few years he took part in all kinds of exhibitions and competitions in order to score the Brownie points necessary to gain membership of the Union of Artists, since that was more or less the only way of being allocated a separate studio. 

It was not the easiest of times. In order to take part in exhibitions you had to have something to display. And in order to create that something to display, you had to have a place in which to create it. Georgy had nowhere.

At last, however, he managed to join the happy ranks of members of the Union of Artists, was allocated his tiny studio, and thought he was at the very peak of happiness. All around him the country was in turmoil, at the very heights of Gorbachev’s ‘perestroika’, people passionately quenching their thirst for information whilst battling with a hunger of somewhat more concrete physical nature caused by food shortages.

Things were now rather difficult for artists, particularly as far as sculpture was concerned. Sculpture, as is well known, is an art form for either rich or totalitarian states. The totalitarian state had ceased to exist but it had not become rich.

Georgy Kurasov started to paint, but it soon became clear that selling his pictures for any acceptable price was going to be impossible, and so he had to feed his family by producing small pastels which Georgy sold through small galleries dealing mainly in souvenirs for foreign tourists.

In 1991 the Soviet Union collapsed. By that time Kurasov had put together a large body of paintings, but had absolutely no idea what he was going to do with them. The future looked bleak.

Then in 1993 his works were first exhibited in the USA. Since then, Georgy Kurasov have exhibited and sold his paintings exclusively in North America.

It is many years since he dropped out of the world of sculpture in Russia, and he never formed part of the world of painting there. Kurasov knows there are plenty of people who, noting the absence of his works at Russian exhibitions, think he has emigrated.

Americans see Georgy Kurasov as a Russian artist, Russians as an American artist. Painters think he is a sculptor. Sculptors are sure he is a painter.

And when Georgy Kurasov thinks of it, he rather like this borderline existence. Perhaps it what makes it possible to be himself, to be unlike anyone else. 

India's mysterious secret past

Crimes and Misdemeanors

Written, directed by and co-starring Woody Allen, Crimes and Misdemeanors is a 1989 comedy-drama which also stars Martin Landau, Mia Farrow, Anjelica Huston, Jerry Orbach, Alan Alda, Sam Waterston and Joanna Gleason.
Crimes and Misdemeanors follows to main characters and story lines. The first involves Dr. Judah Rosenthal (Landau), a prominent married ophthalmologist who is having an affair with a flight attendant named Dolores Paley (Huston). When it becomes apparent that Rosenthal is not planning to leave his family, Dolores threatens to expose their relationship to his wife as well as bringing to light some questionable financial arrangements Rosenthal has been making. Desperate to save his marriage and career, Rosenthal turns to his brother Jack (Orbach), who has ties to the mob and offers to make his problem "go away". Meanwhile Cliff Stern (Woody Allen) is a filmmaker who has been forced to do a documentary on his arrogant brother-in-law, Lester (Alan Alda), a successful television-producer, in order to finance his own documentary on philosopher Prof. Louis Levy (Martin Bergmann). Whilst doing so, Cliff falls for Lester's associate producer, Halley Reed (Farrow) although she rebuffs him. Towards the end of the film Rosenthal and Stern meet at the party of the daughter of Rabbi Ben (Waterston), who is the former's patient and the latter's brother-in-law.
One of Allen's greatest comedy-dramas, Crimes and Misdemeanors strikes a near perfect balance between the two and manages to remain damn funny despite its overall very pessimistic tone. Allen creates another great ensemble piece and manages to, seemingly effortlessly, blend many different characters and story lines. The film unflinchingly examines various moral and ethical quandaries and is one of the director's most philosophical and thought-provoking entries in his filmography. Crimes and Misdemeanors was nominated for three Academy Awards, including Best Director and Screenplay, a Golden Globes for Best Drama Film, and Six BAFTA Awards, including Best Film, Director and Screenplay. It won Best Film, Director and Screenplay at the Boston Society of Film Critics Awards, Film, Director and Screenplay of the Year at the London Critics Circle Film Awards and Best Screenplay from the Writers Guild of America.

திருகோணமலை திருக்கோணேஸ்வரத்தின் தொன்மையான தோற்றங்களும் புராதன விக்ரகங்களின் புகைப்படமும்

Hinduism:Zakkir Naik is exposed by a hindu scholar

நீதிமன்றக் கட்டடத் தொகுதியின் கீழ் பதவி வெற்றிடங்கள்!

Brave Hindu Girl Question To Confused Dr Zakir Naik

Sunday, June 26, 2016


THE history of Nalanda, the ancient university town of Bihar India, goes back to the days of Buddha and Mahavira in the Sixth Century B.C. The town was home to Nalanda Mahavihara, a monastic university of international repute.
Both Buddha and Mahavira often stayed at Nalanda during the rainy season. Buddhist scriptures reveal that they once stayed at Nalanda at the same time, but there is no record of them meeting one another.
Ancient Buddhist sources say that Asoka, the Mauryan emperor (Third Century B.C) built a temple at Nalanda. It was a flourishing hub where the philosopher and alchemist, Nagarjuna, studied and taught in the Second Century A.D. However, excavations have not revealed anything to suggest that the site was occupied before the Gupta period (Fifth Century A.D.), the earliest finds being a copper plate of Samudragupta and a coin of Kumaragupta (414-455 A.D.). Fa-Hien who visited in the Fifth Century A.D. makes no mention of the massive monastic establishments at Nalanda. But Hiuen Tsang who came in A.D 637 during Harsha's reign (606-647 A.D.) refers to the great monastery that Harsha endowed with liberal grants.

Pascal's Principle Used in Braking System