Removing scratches from a car with sunlight. Free Technical Library News

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Removing scratches from a car with sunlight

15.08.2022

The appearance of scratches on the car is inevitable. They spoil the overall look and you have to turn to specialists to eliminate them. However, thanks to the development of Korean scientists, everything will soon be possible to do independently and without much difficulty.

Specialists have created an innovative tool that needs to be applied to a scratch and put the car in the sun. After half an hour, the scratch will disappear. According to the inventors, this material contains a polymer network based on acrylic polyol. Under the influence of infrared rays, a chemical reaction occurs, restoring minor damage at the site of application of the product.

The regeneration process can be accelerated. To do this, you need to use concentrated light. Take, for example, a magnifying glass. In this case, the waiting time can be reduced to 30 seconds.

The team of creators noted that the tool has a transparent texture, so there is no need to match it to the color of the car. The novelty will go into production in the near future.

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Chip IR25750L for current measurement 27.12.2014

IR25750L is a new solution from International Rectifier for measuring current without the use of additional sensors. The microcircuit measures the voltage drop on the open channel resistance of the MOSFET or the saturation voltage of the IGBT transistor, which acts as a key element for controlling the power in the load.

The IR25750L eliminates the need for a current sense resistor or other expensive sensors, increasing overall system efficiency and saving PCB space. The microcircuit can be used to build current protection in electric drive systems, induction heating and other industrial systems.

IR25750L does not require additional external power - the gate input (GATE) not only provides synchronization of the moments of measuring the voltage drop on the power transistor with its open state, but also provides the necessary power to the microcircuit. Thanks to the use of advanced high-voltage technologies of the International Rectifier, the microcircuit provides blocking of the high-voltage input voltage of the transistor (up to 600 V) from the low-voltage part of the circuit during periods of the closed state of the transistor.

Other advantages of the new microcircuit are the low capacitance of the GATE input and the built-in circuit for the formation of an internal time delay (about 200 ns) after the appearance of an active signal at the GATE input - to ensure the full opening of the power transistor before starting to measure the voltage on it. The GATE and CS pins are protected by internal 20,8V clamping diodes.

When building power systems that require more accurate current measurement, it is possible to install an external programmable temperature compensation circuit. Built-in ESD protection and excellent latch immunity on all pins provide the industrial IC IR25750L with a high degree of integrated protection.

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