15-06-2010, 04:10 PM
Abstract :
Today's RC toys are controlled by a single dedicated (and often proprietary) controller. We endeavoured to develop a remote control car that would be controlled via Bluetooth wireless technology. Since Bluetooth is a standardized and relatively reliable wireless protocol, we hoped to create a car controllable by any Bluetooth device. Additionally, Bluetooth consumes low power and has a larger bandwidth than the standard 900MHz RF link, which drives most toys. This added benefit allows for sending of complex information from the car to the controlling devicesomething unseen in consumer grade RC cars.
The main aim is to give command to a Bluetooth enabled car with the help of a computer. The computer is connected to a transmitting Bluetooth module via a RS-232 (9 Pin) connector.
Bluetooth : As one of the youngest member of the LAN family, wireless LANs were little used until recently. The main reasons for this were high prices and low data rates, as well as licensing requirements. However, increasing requirements for mobility, relocation and coverage of locations difficult to wire are making wireless LANs more popular everyday.
Wireless LANs can be designed in many different ways depending on their applications; one kind is a wireless ad-hoc network. An ad-hoc network is a peer-to-peer network set up temporarily to meet some immediate need. In contrast to the majority of radio systems in use today, it doesn't have any centralized server. Ad-hoc radio systems have been in use for some time, for example police, military and fire departments broadly use walky-talky systems. However, the Bluetooth system is the first commercial ad hoc radio system envisioned to be used on a large scale and widely available to the public.
Microcontroller : A microcontroller (also MCU or µC) is a computer-on-a-chip. It is a type of microprocessor emphasizing high integration, low power consumption, self-sufficiency and cost-effectiveness, in contrast to a general-purpose microprocessor (the kind used in a PC). In addition to the usual arithmetic and logic elements of a general-purpose microprocessor, peripheral devices, and input/output interfaces. At clock speeds of as little as a few MHz or even lower, microcontrollers often operate at a very low speed compared to modern day microprocessors, but this is adequate for typical applications. They consume relatively little power (milliwatts).
Microcontrollers are frequently used in automatically controlled products and devices, such as automobile engine control systems, remote controls, office machines, appliances, power tools, and toys. By reducing the size, cost, and power consumption compared to a design using a separate microprocessor, memory, and input/output devices, microcontrollers make it economical to electronically control many more.
