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In recent times, developments in field of communication and robotics hasprogressed with leaps and bounds. In addition, the blend of both disciplineshas contributed heavily in making human life easier and better. So in this workwhile making use of both the aforementioned technologies, a procedure fordesign and implementation of a mobile operated mechanical arm is proposed, thatis, the proposed arm will be operated via a cellular device that connects withthe receiver mounted on the robotic arm. Moreover, over the duration of a call,if any key is pressed from the cellular device than an indicator indistinct tothe key pressed is noticed at the receiver side. This tone representssuperimposition of two distinct frequencies and referred to as DTMF (dual tonemulti-frequency). Further, the mechanical arm is handled via the DTMF tone.Also, the acquired tone at the receiver is taken into a micro-controller(ATMEGA16) using the DTMF decipher module i.e. MT8870. Further, the deciphermodule unwinds the DTMF signal into its corresponding two bit representationand then the matched number is transmitted to the micro-controller. Themicro-controller is programmed to take an action based on the decoded value.Further, the micro-controller forwards control signals to the motor driver unitto move the arm in forward/backward or multi-directional course. Lastly, themechanical arm is capable of picking and placing objects while being controlledwirelessly over GSM (Global System for Mobile Communications).

Design and Implementation of a DTMF Based Pick and Place Robotic Arm