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Car amplifier on a TDA1557Q chip. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Automotive power amplifiers

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Car amplifier on a TDA1557Q chip, circuit

Up - 7...16 V
Imax - 6 A
Rload - 3,2...16 Om
Uin - 40...70 mV

In most cases, a divider is needed at the input (it is sharp). Maybe this is the problem since 1558?

Capacitances at the input - to taste (mine - 0,33 microfarads), resistors kil 10 each, capacitance at the power supply - the more the better.

Publication: cxem.net

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Cold is more dangerous than heat 08.06.2015

Scientists have found that 20 times more people die from cold than from heat.

It is generally accepted that high temperatures have a detrimental effect on the body - they make the heart fail, increase blood pressure and cause dehydration. And many doctors call winter weather optimal for health and beauty. A large-scale study conducted by a group of scientists from different countries proves that everything is exactly the opposite.

Experts studied 74 million deaths that occurred from 1985 to 2012 in 384 different locations in 13 countries. The climate in them ranged from temperate to subtropical. The scientists collected data on average temperature, humidity and air pollution levels to understand what kind of weather people are least likely to die in.

Of all the deaths studied, an average of 7,71% was directly caused by abnormal temperatures for a particular region. In some countries, such as Thailand, Brazil and Sweden, this figure was lower at 3%, and in China, Italy and Japan - as much as 11%. Scientists were surprised to find that out of the total number of "weather" deaths, 7,29%, were associated with cold. Only 0,42% of people died due to the heat.

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