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Winged words, phraseological units. Meaning, history of origin, examples of use
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Sow dragon teeth
Ancient Greek and Roman mythology
Phraseologism: Sow dragon teeth.
Meaning: Sow enmity, discord, confusion.
Origin: The Greek myth about the hero Cadmus tells that the oracle ordered him to follow the cow, which he will meet at the exit from the temple, and where she lies down, to found a city. The cow led Cadmus to a spring guarded by a dragon. Cadmus, having killed the dragon, scattered its teeth, armed warriors grew out of the teeth and attacked Cadmus. On the advice of the goddess Athena, he threw a stone into the middle of them and then the soldiers began to destroy each other. The remaining five warriors helped Cadmus found the city of Thebes.
Random phraseology:
Monday is a hard day.
Meaning:
An explanation for the failure of the business started on Monday, the unwillingness to do anything on that day.
Origin:
There are two versions of the origin of this turnover: 1) the expression goes back to pagan superstition that Monday is the day of the Moon, the patroness of sorcery, sorcery and witchcraft. Therefore, a person who started a business on Monday risked facing the opposition of sorcerers, 2) Monday, according to superstitious ideas, is a black, hard day. On this day, previously superstitious people did not start business, did not go on the road. There is a belief about this day, based on the fact that, according to the Bible, God, having created the world, after five of the six days of creation, repeated: "And it was good." Only after the second day - Monday - this phrase is not in the Bible. |
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| Random news from the Archive Microchip MIC28514/5 buck converter
07.05.2021
Microchip has introduced a new MIC28514/5 buck converter certified for automotive applications according to the AEC-Q100 standard.
These devices feature a high input voltage of 75 V and a Constant On-Time (COT) PWM control method, which achieves high efficiency, and also significantly reduces the number of external components, which positively affects the weight, size and price of the final device. The MIC28514/5 has integrated high-precision MOSFETs that convert high voltage to lower voltage.
Main Features:
input voltage range 4,5...75 V;
adjustable output voltage 0,6...32 V (limited by duty cycle);
high current load 5 A;
adaptive time constant;
built-in reference voltage source 0,6 V;
switching frequency of built-in switches 270...800 kHz;
high voltage internal linear regulator (LDO) for single voltage operation;
soft start function;
the ability to set the operating mode DCM or CCM (only for MIC28515);
programmable current limit and short circuit protection;
thermal shutdown with hysteresis;
compact case VQFN 6x6 mm;
temperature range -40...125°C.
Applications in the automotive industry:
USB-C, built-in charger;
battery management system;
multimedia and data acquisition systems (ADAS);
voltage converters in electric bicycles and electric scooters.
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