8051 Microcontroller Based

RF ground REMOTE CONTROL INTODUCTION- The Project great Range Remote Control stack be utilize to remotely manoeuvre a number of Electrical or Electronic Gadgets connected to it. Unlike downstairs Red remote declargon, this Project employs FM transmission and Reception, and hence it rear be used for comparatively longer range. whatsoever gadget can be switched on/off by keying the number all(a)ocated to it. The manslayer is made up of the famous 8 buffalo chip Micro meshler from Atmel. The Microcontroller is used as the headmaster in the receiver end which is used to control all the crooks.It decodes the Signal from the sender and control the relays according to the signal. For transmission we argon use oftenness modulation at the frequency of 433. 92Mhz. A BRIEF entranceway TO 8051 MICROCONTROLLER- When we adopt to learn about a new computer we have to acquaint about the machine capability we are using, and we can do it by canvass the sexual hardware design (dev ices architecture), and similarly to know about the size, number and the size of the registers.A microcontroller is a single hitch that contains the mainframe (the CPU), non- fickle memory for the political platform (ROM or flash), volatile memory for remark and payoff ( bone), a clock and an I/O control unit. Also called a computer on a chip, billions of microcontroller units (MCUs) are embedded all(prenominal) year in a countless of products from toys to appliances to automobiles. For example, a single vehicle can use 70 or more(prenominal) microcontrollers. The following picture describes a oecumenic block diagram of microcontroller.AT89S52 The AT89S52 is a low-power, high-performance CMOS 8- molybdenum microcontroller with 8K bytes of in- musical arrangement programmable trashy memory. The device is manufactured using Atmels high-density nonvolatile memory engineering and is compatible with the industry- regulation 80C51 instruction set and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with in-system programmable Flash on a monolithic chip, the Atmel AT89S52 is a knock-down(a) microcontroller, which provides a highly flexible and ost-effective resolving power to many, embedded control applications. The AT89S52 provides the following standard features 8K bytes of Flash, 256 bytes of tug, 32 I/O concerns, watchdog timekeeper, twain information pointers, three 16-bit timer/counters, a six-vector two-level interrupt architecture, a profuse duplex serial port, on-chip oscillator, and clock circuitry. In addition, the AT89S52 is designed with static logic for exertion down to zero frequency and supports two software selectable power saving modes. The light(a) Mode stops the CPU speckle allowing the RAM, timer/counters, serial port, and interrupt system to continue functioning.The Power-down mode saves the RAM con-ten ts scarcely freezes the oscillator, disabling all separate chip functions until the next interrupt The hardware is set by a set of program instructions, or software. Once familiar with hardware and software, the user can then get into the microcontroller to the problems easily. The pin diagram of the 8051 shows all of the input/output pins unique to microcontrollers The following are some of the capabilities of 8051 microcontroller. ? Internal ROM and RAM ? I/O ports with programmable pins ? Timers and counters ? Serial data communicationThe 8051 architecture consists of these specific features ?16 bit PC &data pointer (DPTR) ?8 bit program status news show (PSW) ?8 bit stack pointer (SP) ?Internal ROM 4k ?Internal RAM of 128 bytes. ?4 register banks, each containing 8 registers ?80 bits of general purpose data memory ?32 input/output pins arranged as four 8 bit ports P0-P3 ? Two 16 bit timer/counters T0-T1Two external and three internal interrupt sources Oscillator and clock c ircuits THEORY- Radio oftenness remote control) A handheld, wireless device used to operate audio, video and other electronic equipment using radio frequency (RF) transmission.Unlike the more common infrared (IR) remotes, RF remotes do not require line of sight and do not have to be aimed at the equipment. In fact, RF remotes can be operated. RF Receivers (Base Stations) argon Required Since most equipment is IR establish and comes with an IR sensor located on the front panel, the RF must undulate up as IR. This is accomplished with an RF receiver, which is a base station and antenna, that accepts RF signals and converts them to IR. For use inside equipment footlockers, the receiver typically has an IR blaster that showers IR signals to all components by reflecting off the closed cabi last door.The RF receiver also has sockets for several(prenominal) IR emitters (IR flashers) that are wired to, and paste directly over, the IR sensors in the equipment for comminuted aiming. See IR remote control and RF. References- The 8051 microcontroller and Embedded systems using assembly and C Muhammad Ali Mazidi, Janice Gillespie Mazidi 1. Keil Software, dScope Debugger, http//www. keil. com/ 2. National Instruments Multisim 10. 0 www. ni. com/multisim 3. www. 8051projects. info 4. www. 8051projects. net 5. www. dnatechindia. com 6. AT89c51 datasheet available at www. alldatasheets. com