In recent years, technology has been developing rapidly to meet the increasing demand for human needs. Using robotics, human needs are met with speed and accuracy [2]. A robotic arm works by the controls provided by the user or by predetermined commands. The project described here is a robotic arm with 3 degrees of freedom to pick and place objects. The robotic arm is controlled using a mobile application and Bluetooth communication. The robotic arm uses servo motors interfaced with Arduino.
<p>The present scenario of the world relays on water scarcity, enormous amount of water is needed for people but the world has pollution which makes a great effect. Water is polluted due to various reasons such as industrial waste, sewage, and global warming and oil pollution and mainly polluted due to industrial effluent waste water. The main objective of this paper is to control the dissolved oxygen of the industrial waste water by measuring turbidity and dissolved oxygen (DO). Turbidity is measured through the intensity of the light through the medium in Nephelometric unit (NTU) and dissolved oxygen is measured in PPM through amperometic electrode method. The controller is designed to improve the quality of the effluent water through the aeration process. The very low concentration of dissolved oxygen (DO) level is too harmful to the aquatic ecosystem and it pollutes the water to the maximum extent. This measurement method of turbidity has an enhanced idea which processed with the software and it is monitored. The controller is designed as such with the condition of inverse proportionality of water turbidity and dissolved oxygen, which contributes an additive advantage to the concept design.</p>
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