Visible Light Communication Using Double Tone Multiple Frequency (DTMF) Signalling

Lew, Jiun Min (2020) Visible Light Communication Using Double Tone Multiple Frequency (DTMF) Signalling. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

With the rapid growth of the LED display unit, the remote control for it is also another consideration of LED display. However the remote control available for the LED display unit is usually Bluetooth, Wi-Fi, Infrared which only has an effective range up to 20 meters. Besides, the implementation cost for Wi-Fi is also quite high compared to Bluetooth and Infrared. The intention of this project is to search for a long-range control for the LED display unit, which allows the user to send a signal from the transmitting side to the receiving side in the most economic and efficient way. The result obtained in this project successfully proved that laser beams may be used to manipulate the text on the LED display unit which is some 100 meters away from the laser source. A literature review was done to further study visible light communication and double tone multi-frequency (DTMF). This is because both methods would be the main focus to work this project out. Besides, the specification of Bluetooth, Wi-Fi, and Infrared have been studied also. In short, the main objective of this project is to produce a better remote control for LED display units and the technology involved may be commercialized to bring in a profit for further research.