Electronics components & Devices

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Microcontroller based ultrasonic radar circuit
It uses ultrasonic waves to detect an object and measure its distance and angular position, and displays the same on a 20×4 LCD screen. It can detect multiple objects at different angles and distances as new objects are detected.Whereas, Radar having a shorter wavelength is easily absorbed by the water molecules and therefore doesnot reflect back, even if it reaches its target. Therefore, we can conclude that only Sonar is of any use in water, and that too not in air.

The 555 timer IC is an integrated circuit used in a variety of timer, pulse generation, and oscillator applications. The 555 can be used to provide time delays, as an oscillator, and as a flip-flop element. Derivatives provide two or four timing circuits in one package

A medical ventilator (or simply ventilator in context) is a mechanical ventilator, a machine designed to move breathable air into and out of the lungs, to provide breathing for a patient who is physically unable to breathe, or breathing insufficientlyA ventilator blows air into the airway through a breathing tube. One end of the tube is inserted into patient's windpipe and the other end is attached to the ventilator. The breathing tube serves as an airway by letting air and oxygen from the ventilator flows into the lungs