Abstract:
This Project Multi-Pattern Running light is used to generate several designs of Running Lights. We use ten LEDs for display. The designs can be selected by using two switches UP and DOWN. The 8 bit Microcontroller is used to control all the operations. It control the LEDs though the Ports. The above system is monitored and controlled by the 8 bit microcontroller AT89C2051. The Microcontroller continuously monitors the Switches and switch on/off the LEDs according to the Program. The Power for the circuit is derived from the Step down transformer and the 5V regulator IC7805. The regulator IC produces a constant 5v output

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INTRODUCTION-:
This Project Multi-Pattern Running light is used to generate several designs of Running Lights. We use ten LED's for display. The designs can be selected by using two switches UP and DOWN. The 8 bit Microcontroller is used to control all the operations. It control the LED's though the Ports.
The above system is monitored and controlled by the 8 bit microcontroller AT89C2051. The Microcontroller continuously monitors the Switches and switch on/off the LED's according to the Program. The Power for the circuit is derived from the Step down transformer and the 5V regulator IC7805. The regulator IC produces a constant 5v output.
A BRIEF INTRODUCTION TO ATC2051 MICROCONTROLLER:
The AT89C2051 is a low-voltage, high-performance CMOS 8-bit microcomputer with 2K bytes of Flash programmable and erasable read-only memory (PEROM). The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C2051 is a power-ful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications. The AT89C2051 provides the following standard features: 2K bytes of Flash, 128 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a five vector two-level interrupt architecture, a full duplex serial port, a precision analog comparator, on-chip oscillator and clock circuitry. In addition, the AT89C2051 is designed with static logic for opera-tion down to zero frequency and supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt system to continue functioning. The power-down mode saves the RAM contents but freezes the oscillator disabling all other chip functions until the next hardware reset