A grass cutter is a machine that uses a revolving blade or blades to cut a lawn grass. Many designs have been made, each suited to a particular purpose and this robot used string trimmer as the cutting blade. This robot is designed to operate by a rechargeable battery and can be described as an intelligent robot because the micro-controller will receive information from sensors connected to it in avoiding obstacle to ensure a neat pattern of cut and use the information to actuate the left and right motors driving the wheels and the centre motor driving string trimmer and at the same time it obeys all parameters of work and its program database. As it is well known that random motion for a lawn mower would sometimes lead to uncovered spaced, it all depends on how random is random. Few features were added with more advanced option which allows the user to manually control the lawn mower with a PS2 controller. This, in fact, where the user can manually control the grass cutting robot that looks like a tank. The data analysis was listed in the table to test the development of grass cutter. This robot is safe to use, environmental friendly, easy to operate, and have various modes such as manual and automated mode.
Electrical Resistance Tomography (ERT), due to its diverse advantages has become a promising technique for monitoring and analysing various industrial flows. In this research, an ERT system employing a conducting bubble column was studied because a majority of industrial processes use metal composites for their columns. This paper presents an approach to obtain the optimum size of electrodes in ERT to maximize the capability of an ERT system. A finite element model using COMSOL software was developed to investigate the effect of the electrode size in ERT on sensing field distribution. By adapting the conducting boundary strategies in COMSOL, wider and longer electrodes reduce the potential change near source, suggesting less current density near source. Besides that, wider and longer electrodes also reduce the potential drop and improve the signal strength in Electrical Resistance Tomography. The optimum size of 12 mm x 100 mm electrode is sufficient for the proposed ERT system using conducting bubble column.
Mosquito pest control is a recurring matter that requires constant monitoring and attainment. This is due to the creature being able to spread various deadly diseases and mosquitoes are responsible for the death of one million people every year. The conventional prevention methods of using insecticides and bug zappers are somewhat less effective and affect the environment in various ways such as the extinction of beneficial insects, the biological evolution of mosquitoes, and climate changes. In this study, a solar-powered mosquito trap is created to trap mosquitoes by sucking them in using a fan while being attracted to a built-in LED to lure them into the trap. An air quality monitor is equipped to observe the change of temperature and carbon dioxide (CO2) of the surroundings and as a method to centralize the installation of the trap. The monitor display and air quality data retrieval are processed by an Arduino microcontroller. In the prototype observation, it was shown that the temperature increased proportional to CO2 concentration. The power efficiency of this device increased by 30% when using a solar panel. At optimal sunlight exposure and adequate battery capacity, the device would run for more than 24 hours and would get charged instantly on the next day when sunlight is present.
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