Parking Gate Control Using IR

Infrared technology is highlighted because of its increasing presence in mainstream applications, its current and potential usage in disability-related applications, and its advantages over other forms of wireless communication as depicted in Fig. 1, infrared radiation is the region of the electromagnetic spectrum between microwaves and visible light. In infrared communication an LED transmits the infrared signal as bursts of non-visible light. At the receiving end a photodiode or photoreceptor detects and captures the light pulses, which are then processed to retrieve the information they contain. Some of the common applications of infrared technology were listed as shown below:

            Infrared technology offers several important advantages as a form of wireless communication. Advantages and disadvantages of IR are first presented, followed by a comparative listing of radio frequency (RF) advantages and disadvantages.

1. Augmentative communication devices
2. Car locking systems
3. Computers
   a. Mouse          b. Keyboards   c. Floppy disk drives               d. Printers
4. Emergency response systems
5. Environmental control systems
   a. Windows     b. Doors          c. Lights          d. Curtains      e. Beds                        f. Radios
6. Headphones
7. Home security systems
8. Navigation systems
9. Signage
10. Telephones
11. TVs, VCRs, CD players, stereos
12. Toys

IR Advantages:

1. Low power requirements: therefore ideal for laptops, telephones, personal digital assistants
2. Low circuitry costs: $2-$5 for the entire coding/decoding circuitry
3. Simple circuitry: no special or proprietary hardware is required, can be incorporated into the integrated circuit of a product
4. Higher security: directionality of the beam helps ensure that data isn't leaked or spilled to nearby devices as it's transmitted
5. Portable
6. Few international regulatory constraints: IrDA (Infrared Data Association) functional devices will ideally be usable by international travelers, no matter where they may be
7. High noise immunity: not as likely to have interference from signals from other devices

#include<avr/io.h> #include<util/delay.h> #include<avr/interrupt.h> #include<stdio.h> static int usart_putchar(char c, FILE *stream); static FILE mystdout = FDEV_SETUP_STREAM(usart_putchar, NULL,_FDEV_SETUP_WRITE); static int usart_putchar(char c, FILE *stream) { if (c == '\r') usart_putchar(' ', stream); loop_until_bit_is_set(UCSRA, UDRE); UDR = c; return 0; } int i=4; int x=0,y=0,a=0,b=0,count=0; ISR(INT0_vect) { y=0; if(x==0) { x=1; i=4; while(i--) { PORTC=0b00111011; _delay_ms(20); PORTC=0b00110111; _delay_ms(20); PORTC=0b00101111; _delay_ms(20); PORTC=0b00011111; _delay_ms(20); } } } ISR(INT1_vect) { if(y==0) { x=0; y=1; i=4; while(i--) { PORTC=0b00011111; _delay_ms(20); PORTC=0b00101111; _delay_ms(20); PORTC=0b00110111; _delay_ms(20); PORTC=0b00111011; _delay_ms(20); } } } int main(void) { DDRC=0xff; stdout = &mystdout; UCSRA=0x00; UCSRB=0x18; UCSRC=0x86; UBRRH=0x00; UBRRL=51; GICR=0b11000000; MCUCR=0b00001010; printf("WELCOME TO ENERGY SAVEING SCHEME\n\r"); sei(); }