Wireless communication for control
Mark Bretall
Andrew Pedersen
breta004
peder418
http://www.howstuffworks.com/wireless-network.htm
This article touches the basics of what is wireless communication, and describes how computers and
other electronics devices can transmit wireless data. The wireless communication links with a 2040Hz
to 50Hz signal and can be secured with different algorithms to encrypt the data transfer and help
reduce the invaders on the network. The wireless network communication setup is often used to control
various devices throughout personal homes and in businesses.
http://electronics.howstuffworks.com/wireless-power3.htm
The article shows how wireless communication can be used to power and control devices. An electric
toothbrush is exposed to water frequently so and standard plug in would be dangerous, this case uses an
inductive coil to wirelessly control the battery. Wireless power is sent through a base coil, and thus
creating a magnetic field, that is induced in the electric toothbrush's coil and then charging its internal
battery. Also the article goes into long distance wireless communication with the use of microwaves at
high power, it describes being able to power and control an unmanned ultra-light aircraft from the
ground.
http://auto.howstuffworks.com/remote-entry
l.h tm
The keyless entry article describes how the keyfob device uses wireless communication to tell a
receiver in your car what to do. Most keyfobs have multiple buttons to control the car differently. The
keyfob uses a wireless control module that can be controlled by the multiple buttons on the pocket-size
device. vVhen a specific button is pressed, it goes through the control circuit and tells what signal to
wireless transmit. The receiver on the car is looking for specific signals that are coded to that key fob,
and when the signal is seen, the car reacts accordingly.
http://electrontcs.howstuffworks
.com/pbvstation -three4.h tm
The Playstation3 controller uses a controller called the Dual Shock 3 and this controller is motion
sensitive. It has a scan external sensor and is called the SIX AXIS since it has "six degrees of freedom".
This controller has abandoned its vibration feature to allow for better control features with its wireless
motion sensor. The conti"oller uses Bluetooth while being used wirelessly.
http://electronics.howstuffworks
.com/bluetooth4 .htm
Security with Bluetooth is becoming more and more of a control issue. There needs to be extra
precautions when sending wireless communications so that the signals ain't intercepted and Bluetooth
technology is no different. The Bluetooth signal is a remote access just like "ViFi so there is a chance of
the signal being intercepted without a secure network and control. The controls in Bluetooth have made
it very fast and easy to connect but have led to some major control issues with security. There are many
different control modes for security with Bluetooth, there are such users called "trusted devices" and
these are always allowed access and for other devices the user has to allow access for them to gain
permission. The automatically connecting system with Bluetooth has led to some problems with viruses
but only while using an unsecured connection. There are many area's that still need to be improved with
more advanced controls.