In present generation grass cutter machines are becoming very popular today. Pollution is manmade, which we can be seen in our daily life. In old model of grass cutter IC engine was used and hence because of its environmental impact, pollution level rises. IC engine driven cutter is more costly. Maintenance of such conventional machine is more. To avoid these drawbacks, we plan to build new type of grass cutter which runs on solar energy and this model is economical compared to previous one. The aim of our project is to make the grass cutter which operates on solar energy, hence save the electricity and reduces manpower. In this project we use 8051 microcontroller for controlling the operations of a grass cutter. Also the grass cutter has Ultra sonic sensor for obstacle detection. Grass cutter operates automatically hence it does not require skilled person to operate.

A compact (25×28×1.57 mm 3 ) and wide-band multimode frequency tunable antenna with a defected ground structure (FRDGS) for 4G and 5G conformal portable devices and multi-band wireless systems is presented in this article. In a previous study, frequency reconfigurable antenna designs only used the method of adding slots on the patch or ground. In this study, a combination of multiple slots, partial ground, and defective ground structure techniques are utilised to attain the advantages of compactness, wide impedance bandwidth, and steady radiation pattern. Multiple slots on the top layer of the substrate and F-shaped slot etched at the bottom make the proposed antenna. Two PIN diodes are inserted in the F-shaped slot for frequency reconfiguration, allowing the antenna to switch between different resonances. Ansys high frequency structure simulator 15.0v is used to simulate the antenna parameters. This antenna performance is demonstrated using measured and simulated data. The simulated and measured results clearly show that the proposed antenna can switch among six dissimilar resonant frequency bands via various modes of operation across the frequency spectrum from 2.3 to 8.9 GHz. The antenna works in a variety of commercial bands, such as WLAN/Bluetooth (2.4-2.5 GHz), LTE/4G (2.3-2.7 GHz), S-band (2-4 GHz), Radio Navigation (2.7-2.9 GHz), and 5G/sub-6 (3.3-4.9 GHz), according to simulations and experiments. The proposed design features narrowband, wideband, and ultra-wideband properties with a consistent radiation pattern, adequate gain (1.6 to 5.8 dB), and high radiation efficiency (86 to 94%) in a small package. Furthermore, the performance comparison of the proposed antenna with that of the state-of-the-art antennas in terms of compactness, frequency reconfigurability, number of operating bands, and impedance bandwidth demonstrates the novelty of the proposed antenna and its potential application in multiple wireless applications.

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This most important & goal of this proposed venture work is an try to layout a complicated car security utility which could discover automobile accident detection and hearth detection alert can ship the info over GSM to authorized persons. In gift present security models, there's no such automation machine for you to ship alert to the consumer while an coincidence is meet or if it receives stuck with fireplace. It could be very difficult to perceive the automobile in this example we are featuring the brand new safety machine for four wheelers, with a purpose to have given protection to the car. In this gadget, the vehicle will have Position sensor and bump sensors inside the vehicle to discover the vehicle coincidence and we have a temperature sensor to stumble on engine overheating and alert the consumer inside the automobile with buzzer sound and an alert is dispatched over GSM module. The entire safety gadget is controlled with Arduino UNO board. This entire system is designed deliberating the low variety motors to offer them excessive protection. Keywords: GSM module, fire detection, Accident detection, bump sensor.

Truck drivers typically work long hours and occasionally in highly polluted settings like mines. Accident prevention at the workplace relies heavily on the health and alertness of the driver. The cabin's air quality can sometimes get worse, which can make drivers tired. A gas detector is a piece of equipment that works as part of a safety system to tell you if there are gases in a certain area. This type of project can communicate with the control system to automatically switch off process and is used to detect gas leaks and other emissions. There are numerous gases that can be harmful to organic life, such as humans or animals, which is why this kind of device is important. Oxygen depletion and combustible, flammable, and toxic gases can be detected with gas detectors. This kind of device is used a lot in industry and can be found monitoring manufacturing processes in places like oil rigs. Gas leak detection is the process of using sensors to find gas leaks that could be dangerous. When a hazardous gas is detected, these sensors typically emit an audible alarm. Early detection of gas leaks, when they occur, is one way to cut losses caused by leaks. One of the many technologies that helps stop gas leaks from harming people even more is the mobile sensor. Another approach to overcoming losses from both material and non-material sources is the creation of mobile sensors. It is anticipated that it will eventually be overcome using a gas sensor MQ-2 as a detector before it has a wider impact. MQ-2 is chosen due to inexpensive and long lifespan. The Arduino IDE is used to implement the C language, which is used to calibrate and configure MQ-2. With a distance of about 0-10 cm between the gas sensor and the point of leakage, it is anticipated that the results will be accurate to 80 percent after the gas sensor has been configured.