Abstract:
With the advancement in technology, the number of electronic devices in our day-today
lives has increased to make life simpler. So a necessity to construct a Universal
Remote System that will easily control all these devices from a distance will not only
reduce the complexity of handling the number of devices simultaneously, but also
save power.
This paper presents a successfully developed hardware of a Universal Remote Control
System using DTMF (Dual- Tone Multi-Frequency) tones as the control signals. The
uniqueness of DTMF is that it is simple to generate and noise- immune. This system
was also implemented using GSM links besides the wired channel, the main
advantage of it being that it helps in controlling devices located at any part of the
world or at any place like hazardous plants, where the presence of a human could
prove dangerous. So there are a number of practical applications associated with this
system. It is simple, economical, easy to use and could be further upgraded by adding
a password-protection to it. Through this, only selected people can access control on
the devices. A voice-controlled command could be embedded to make the system
more flexible.
