Using HC-SR04 with Arduino.

HC-SR04 is an ultrasonic sensor, most commonly used for range detection/ distance measuring. It uses SONAR mechanism for its working and can detect obstacles from (1-13) feet. Ultrasonics are Independent of : Light Smoke Dust Color Material (except for soft surfaces, i.e. wool, because the surface absorbs the ultrasonic sound wave and doesn’t reflect sound.) […]

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DEEPER INTO THE P-N JUNCTION.

We will begin with a question, When a P-N junction diode terminals are left open circuited , the  voltage measured between them is zero. That is, the voltage V0 does not appear between the diode terminals. Why is that? I’m talking about the voltage V0 depicted here in the image : Why are we not […]

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MQ-2 Gas Sensor Arduino.

As I currently reside in India, most of the houses here have a LPG -Gas stove system for cooking food and various other kitchen activities. There are LPG cylinders which are used as a fuel source for the gas stove. Many a times, disastrous accidents take place due to leakage of these cylinders, in these […]

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