DTMF Based Device Control|Mobile Based Device Control using Arduino (latest Project 2020)

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This project aims at developing a DTMF based Device control that involves the control of the devices connected to the CPLD by a handset. The phone will transmit a particular frequency corresponding to the key pressed to the decoder section, which will in turn provide a BCD output corresponding to each frequency. In accordance to the output, a device connected to the CPLD through an optocoupler will be controlled through it. According to the keys pressed on the mobile phone, the device will be ON/OFF. E.g if key ‘1 is pressed then it will ON device 1. Key (2) is pressed then it will be ON device 2.The seven segment is to display the device id which is will be ON or OFF.

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