The automatic door opening systems are used in commercial buildings, shopping malls, theaters, etc. These systems are used to open and close the door when a person comes near to the entry of the door and close it after the person entered into the door. This kind of system can be built by using various kinds of sensors such as PIR sensors, Radar sensors, Laser sensors,and Infrared sensors etc. This project uses a PIR sensor to sense the infrared (IR) energy generated by the human body.When somebody come close to the door, the IR energy sensed by the sensor transforms and triggers the sensor to open and close the door routinely. Further, the indication sent to microcontroller to control the door.
Till the last decades, a million miles of cables are wound in the air across the country. But now it is placed in the underground, which is higher to an earlier method. Because, underground cables are not affected by any opposing weather condition … [Continue reading]
To understand the roots of SCADA, we must know the industrial organization’s problems which are trying to solve. Before the SCADA concept was introduced in the mid-20th century, several industrial floors, plants, and remote sites depend on personnel … [Continue reading]
Most of the systems need at least one phase of amplification. Hence amplifiers can be used in almost all the electronic devices. These are the devices that raise the amplitude of the i/p signal. The o/p of the power supply is controlled by the … [Continue reading]
The term “Square wave” can be defined as a non-sinusoidal periodic waveform that can be denoted as an infinite summary of sinusoidal waves. It has an alternate of amplitude at a fixed frequency between stable min and max value with the equal … [Continue reading]