The last, few years, air drones have been widely known as they are remote-controlled, flying devices that are capable of filming and photographing while being on the air. These pose a threat to our personal privacy, national security and also to our various activities. Drone catcher gun is a scalable system, which provides the maximum protection of areas and facilities of sizes, forms and functions [1]. It comprises of different sets of equipment depending on the application (private houses, prisons, commercial venues, government buildings, industrial installations, airports, border security, critical infrastructure, military facilities). We chose these particular bottles as even after our processing on them, they are still safe to tolerate high pressures. One of the most important factors for the right performance of the gun is how fast the valve will open and release the air. Basically, we making and using this gun for the security purposes and to secure from drone [2].

Vibration is the most common drive shaft problem. Small cars and short vans and trucks (LMV) are able to use a single drive shaft with a slip joint at the front end without experiencing any undue vibration. However, with vehicles of longer wheel base, the longer drive shaft required would tend to sag and under certain operating conditions would tend to whirl and then setup resonant vibrations in the body of the vehicle, which will cause the body to vibrate as the shaft whirls [1].

Bluetooth control floor cleaning machines are are only used in households for only dry and wet cleaning but not as infection remover. So it is only used in households and not in hospitals or small areas in public. The automatic floor mops like hydro robot are bulky and they also require large power and are used for commercial purpose. But we think this (Our cleaner) will solve all in one go. We will basically focus on a smart and smaller and good designed robot which can be used in many sectors like healthcare and educational areas (which are of course small areas) and also for household use. So it will be both for terminal cleaning like medicals and indoor floor cleaning. In future we will focus on indoor air cleaning service as an additional feature to this machine.

The braking system discussed in this paper focuses on a mechatronics-based system which is able to detect obstacle in front of the vehicle. The drawbacks found in conventional system can be removed using mechatronics approach. Humans using the vehicle may not be able to assess the situation at which brake is to be applied. Therefore, there is need to help the driver by using electronic components. Different electronic components will be used to determine the time at which brake is to be applied. Even, if the driver is not able react to the situation, mechatronic system will apply brake on its own. The most common causes of accidents are- unconsciousness of driver, failure of braking system, road condition, uncontrollable speed of vehicle. Thus, there is need to automatically control the vehicle using electronic devices. Therefore, a system known as intelligent braking system came into existence. The name intelligent is given because it can take decisions automatically depending upon the input from ultrasonic sensors [1,2].

From time immemorial, the sun has been the major source of energy for life on earth. The solar energy was being used directly for purposes like drying clothes, curing agricultural produce, preserving food articles, etc. Even today, the energy we originate from fuel-wood, petroleum, paraffin, hydroelectricity and even our food originates obliquely from sun. Solar energy is almost unbounded. The total energy we obtain from the sun far exceeds our energy demands. Ever since the industrial revolutions human have been dependent on fuels, electricity and wind energy. For human enlargement in many countries there is study and trials are going on the Solar energy and the wind energy, So we make our new concept solar powered grass cutting machine in these concept we cut grass s on the agricultural products or on small plants in lawns and gardens. Remote controlled grass cutter can be described as the application of Radio frequency to power a machine on which electric motor rotates which in turn rotates a blade which does the mowing of a grass.

The objective of this work is to automate the conventional power hacksaw machine in order to achieve high productivity of work-pieces than the power hacksaw machine using Double hacksaw blade. The operator need not measure the length of the work-piece that is to be cut. The machine feeds the work-piece with the help of a shaft, which is driven by a DC motor. A DC motor is used to bring about the reciprocating motion required for cutting the work-pieces. With the help of this multi-way power hacksaw machine the four metal bars can be cut simultaneously to get high speed cutting rate and to achieve mass production for maximum profit in related companies. This project is very much useful and easy to install by user. The reference number should be shown in square bracket