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ALCOHOL DETECTOR
Post: #1

ALCOHOL DETECTOR


.docx  ALCOHOL DETECTOR MINI 1.docx (Size: 415.61 KB / Downloads: 67)

INTRODUCTION:

Objective: The main aim of this embedded application is to design a alcohol detector using RF Communication and AT89c51 Programmable controller.



DESCRIPTION OF THE PROJECT

This application is in the area of embedded systems.

An embedded system is some combination of computer hardware and software, either fixed in capability or programmable, that is specifically designed for a particular function

Since the embedded system is dedicated to specific tasks, design engineers can optimize it reducing the size and cost of the product and increasing the reliability and performance. Embedded systems are controlled by one or more main processing cores that are typically either a microcontroller or a digital signal processor (DSP). Embedded systems control many devices in common use today.



2.2 HT12E:
Features:

_ Operating voltage
_ 2.4V~5V for the HT12A
_ 2.4V~12V for the HT12E
_ Low power and high noise immunity CMOS technology
_ Low standby current: 0.1_A (typ.) at VDD=5V
_ HT12A with a 38kHz carrier for infrared transmission medium
_ Minimum transmission word
_ Four words for the HT12E
_ One word for the HT12A
_ Built-in oscillator needs only 5% resistor
_ Data code has positive polarity
_ Minimal external components
_ Pair with Holtek_s 212 series of decoders
_ 18-pin DIP, 20-pin SOP package

Applications
_ Burglar alarm system
_ Smoke and fire alarm system
_ Garage door controllers
_ Car door controllers
_ Car alarm system
_ Security system
_ Cordless telephones
_ Other remote control systems
Post: #2
ALCOHOL DETECTOR


.docx  ALCOHOL_DETECTOR_MINI_1.docx (Size: 415.61 KB / Downloads: 47)

ABSTRACT

The main aim of this embedded application is to detect the alcohol drunken people. We are developing an embedded kit which will be placed in a vehicle. Now, the vehicle will be under the control of the kit .If any drunken person enter in to the vehicle it gives a buzzer sound immediately , and now the car will be under the control of the hardware used.
We run the vehicle by using wireless communication i.e. from Control section (acts as transmitter) we are ejecting the control signals, then the vehicle receives (acts as receiver) the signals, according to the signals it will give a alarm or buzzer.
It aims at designing and executing the vehicle controlling using RF. By using the RF communication, whenever alcohol is detected using the alcohol detector, the micro controller sends the information to the encoder and the encoder encodes the values and is received by the RF Transmitter. RF Receiver receives the information from the RF Transmitter and decoder decodes the serial input and sends the output to the micro controller and according to the information received by the micro controller the robot will move in that particular direction. The robot movement is driven with the help of L293D as driver IC.
The programming language used for developing the software to the microcontroller is Embedded/Assembly. The KEIL cross compiler is used to edit, compile and debug this program. Micro Flash programmer is used for burning the developed code on Keil in to the microcontroller Chip. Here in our application we are using AT89C51 microcontroller which is Flash Programmable IC. AT represents the Atmel Corporation represents CMOS technology is used for designing the IC.

DESCRIPTION OF THE PROJECT

This application is in the area of embedded systems.
An embedded system is some combination of computer hardware and software, either fixed in capability or programmable, that is specifically designed for a particular function
Since the embedded system is dedicated to specific tasks, design engineers can optimize it reducing the size and cost of the product and increasing the reliability and performance. Embedded systems are controlled by one or more main processing cores that are typically either a microcontroller or a digital signal processor (DSP). Embedded systems control many devices in common use today.
The Keil C51 C Compiler for the 8051 microcontroller is the most popular 8051 C compiler in the world. It provides more features than any other 8051 C compiler available today. The C51 Compiler allows you to write 8051 microcontroller applications in C that, once compiled, have the efficiency and speed of assembly language. Language extensions in the C51 Compiler give you full access to all resources of the 8051.

HARDWARE DESCRIPTION

The 212 encoders are a series of CMOS LSIs for remote control system applications. They are capable of encoding information which consists of N address bits and 12_N data bits. Each address/data input can be set to one of the two logic states. The programmed addresses/ data are transmitted together with the header bits via an RF or an infrared transmission medium upon receipt of a trigger signal. The capability to select a TE trigger on the HT12E or a DATA trigger on the HT12A further enhances the application flexibility of the 212 series of encoders. The HT12A additionally provides a 38kHz carrier for infrared systems.

Description:

The 212 decoders are a series of CMOS LSIs for remote control system applications. They are paired with Holtek_s 212 series of encoders (refer to the encoder/decoder cross reference table). For proper operation, a pair of encoder/decoder with the same number of addresses and data format should be chosen. The decoders receive serial addresses and data from a programmed 212 series of encoders that are transmitted by a carrier using an RF or an IR transmission medium. They compare the serial input data three times continuously with their local addresses. If no error or unmatched codes are found, the input data codes are decoded and then transferred to the output pins. The VT pin also goes high to indicate a valid transmission. The 212 series of decoders are capable of decoding informations that consist of N bits of address and 12_N bits of data. Of this series, the HT12D is arranged to provide 8 address bits and 4 data bits, and HT12F is used to decode 12 bits of address information.

Power-down Mode

In the power-down mode, the oscillator is stopped, and the instruction that invokes power-down is the last instruction executed. The on-chip RAM and Special Function Registers retain their values until the power-down mode is terminated. The only exit from power-down is a hardware reset. Reset redefines the SFRs but does not change the on-chip RAM. The reset should not be activated before V CC is restored to its normal operating level and must be held active long enough to allow the oscillator to restart and stabilize.

Program Memory Lock Bits

On the chip are three lock bits that can be left unprogrammed (U) or can be programmed (P) to obtain the additional features listed in the table below. When lock bit 1 is programmed, the logic level at the EA pin is sampled and latched during reset. If the device is powered up without a reset, the latch initializes to a random value, and holds that value until reset is activated. It is necessary that the latched value of EA be in agreement with the current logic level at that pin in order for the device to function properly.

INTERRUPT PROGRAMMING WITH 8051:

An interrupt is an external or internal event that interrupts the micro controller to inform it that a device needs its service. In the interrupt method, whenever any device needs its service, the device notifies the micro controller by sending it an interrupt signal. Upon receiving an interrupt signal, the micro controller interrupts whatever it is doing and serves the device. For every interrupt, there must be an service routine called as interrupt service routine (ISR) or interrupt handler. There is a fixed location in memory that holds the address of its ISR. The group of memory locations set aside to hold the addresses of ISRs is called the vector table.

SIX INTERRUPTS IN 8051:

There are really five interrupts available to the user in the 8051 but many manufacturer’s data sheets state that there are six interrupts since they include RESET.
RESET: When the reset pin is activated, the 8051 jumps to address location 0000. This is the power-up reset.
Two interrupts are set aside for the timers: one for timer0 and one for timer1. Memory locations 000BH and 001BH in the interrupt vector table belong to timer0 and timer1, respectively.
Two interrupts are set aside for hardware external hardware interrupts. Pin numbers 12 (P3.2) and 13 (P3.3) in port34 are for the external hardware
interrupts INT0 and INT1, respectively. Memory locations 0003H and 0013H in the interrupt vector table are assigned to INT0 and INT1, respectively.

DC Motor:

DC motors are configured in many types and sizes, including brush less, servo, and gear motor types. A motor consists of a rotor and a permanent magnetic field stator. The magnetic field is maintained using either permanent magnets or electromagnetic windings. DC motors are most commonly used in
variable speed and torque.
Motion and controls cover a wide range of components that in some way are used to generate and/or control motion. Areas within this category include bearings and bushings, clutches and brakes, controls and drives, drive components, encoders and resolves, Integrated motion control, limit switches,
linear actuators, linear and rotary motion components, linear position sensing, motors (both AC and DC motors), orientation position sensing, pneumatics and pneumatic components, positioning stages, slides and guides, power transmission (mechanical), seals, slip rings, solenoids, springs.
Motors are the devices that provide the actual speed and torque in a drive system. This family includes AC motor types (single and multiphase motors, universal, servo motors, induction, synchronous, and gear motor) and DC motors (brush less, servo motor, and gear motor) as well as linear, stepper and air motors, and motor contactors and starters.

General Description:

The LM555 is a highly stable device for generating accurate time delays or oscillation. Additional terminals are provided for triggering or resetting if desired. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For astable operation as an oscillator, the free running frequency and duty cycle are accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms, and the output circuit can source or sink up to 200mA or drive TTL circuits.
Post: #3
01-10-2012, 03:30 PM Post: #2
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RE: ALCOHOL DETECTOR
ALCOHOL DETECTOR


ALCOHOL_DETECTOR_MINI_1.docx (Size: 415.61 KB / Downloads: 5)

ABSTRACT

The main aim of this embedded application is to detect the alcohol drunken people. We are developing an embedded kit which will be placed in a vehicle. Now, the vehicle will be under the control of the kit .If any drunken person enter in to the vehicle it gives a buzzer sound immediately , and now the car will be under the control of the hardware used.
We run the vehicle by using wireless communication i.e. from Control section (acts as transmitter) we are ejecting the control signals, then the vehicle receives (acts as receiver) the signals, according to the signals it will give a alarm or buzzer.
It aims at designing and executing the vehicle controlling using RF. By using the RF communication, whenever alcohol is detected using the alcohol detector, the micro controller sends the information to the encoder and the encoder encodes the values and is received by the RF Transmitter. RF Receiver receives the information from the RF Transmitter and decoder decodes the serial input and sends the output to the micro controller and according to the information received by the micro controller the robot will move in that particular direction. The robot movement is driven with the help of L293D as driver IC.
The programming language used for developing the software to the microcontroller is Embedded/Assembly. The KEIL cross compiler is used to edit, compile and debug this program. Micro Flash programmer is used for burning the developed code on Keil in to the microcontroller Chip. Here in our application we are using AT89C51 microcontroller which is Flash Programmable IC. AT represents the Atmel Corporation represents CMOS technology is used for designing the IC.

DESCRIPTION OF THE PROJECT

This application is in the area of embedded systems.
An embedded system is some combination of computer hardware and software, either fixed in capability or programmable, that is specifically designed for a particular function
Since the embedded system is dedicated to specific tasks, design engineers can optimize it reducing the size and cost of the product and increasing the reliability and performance. Embedded systems are controlled by one or more main processing cores that are typically either a microcontroller or a digital signal processor (DSP). Embedded systems control many devices in common use today.
The Keil C51 C Compiler for the 8051 microcontroller is the most popular 8051 C compiler in the world. It provides more features than any other 8051 C compiler available today. The C51 Compiler allows you to write 8051 microcontroller applications in C that, once compiled, have the efficiency and speed of assembly language. Language extensions in the C51 Compiler give you full access to all resources of the 8051.

HARDWARE DESCRIPTION

The 212 encoders are a series of CMOS LSIs for remote control system applications. They are capable of encoding information which consists of N address bits and 12_N data bits. Each address/data input can be set to one of the two logic states. The programmed addresses/ data are transmitted together with the header bits via an RF or an infrared transmission medium upon receipt of a trigger signal. The capability to select a TE trigger on the HT12E or a DATA trigger on the HT12A further enhances the application flexibility of the 212 series of encoders. The HT12A additionally provides a 38kHz carrier for infrared systems.

Description:

The 212 decoders are a series of CMOS LSIs for remote control system applications. They are paired with Holtek_s 212 series of encoders (refer to the encoder/decoder cross reference table). For proper operation, a pair of encoder/decoder with the same number of addresses and data format should be chosen. The decoders receive serial addresses and data from a programmed 212 series of encoders that are transmitted by a carrier using an RF or an IR transmission medium. They compare the serial input data three times continuously with their local addresses. If no error or unmatched codes are found, the input data codes are decoded and then transferred to the output pins. The VT pin also goes high to indicate a valid transmission. The 212 series of decoders are capable of decoding informations that consist of N bits of address and 12_N bits of data. Of this series, the HT12D is arranged to provide 8 address bits and 4 data bits, and HT12F is used to decode 12 bits of address information.

Power-down Mode

In the power-down mode, the oscillator is stopped, and the instruction that invokes power-down is the last instruction executed. The on-chip RAM and Special Function Registers retain their values until the power-down mode is terminated. The only exit from power-down is a hardware reset. Reset redefines the SFRs but does not change the on-chip RAM. The reset should not be activated before V CC is restored to its normal operating level and must be held active long enough to allow the oscillator to restart and stabilize.

Program Memory Lock Bits

On the chip are three lock bits that can be left unprogrammed (U) or can be programmed (P) to obtain the additional features listed in the table below. When lock bit 1 is programmed, the logic level at the EA pin is sampled and latched during reset. If the device is powered up without a reset, the latch initializes to a random value, and holds that value until reset is activated. It is necessary that the latched value of EA be in agreement with the current logic level at that pin in order for the device to function properly.

INTERRUPT PROGRAMMING WITH 8051:

An interrupt is an external or internal event that interrupts the micro controller to inform it that a device needs its service. In the interrupt method, whenever any device needs its service, the device notifies the micro controller by sending it an interrupt signal. Upon receiving an interrupt signal, the micro controller interrupts whatever it is doing and serves the device. For every interrupt, there must be an service routine called as interrupt service routine (ISR) or interrupt handler. There is a fixed location in memory that holds the address of its ISR. The group of memory locations set aside to hold the addresses of ISRs is called the vector table.

SIX INTERRUPTS IN 8051:

There are really five interrupts available to the user in the 8051 but many manufacturer’s data sheets state that there are six interrupts since they include RESET.
RESET: When the reset pin is activated, the 8051 jumps to address location 0000. This is the power-up reset.
Two interrupts are set aside for the timers: one for timer0 and one for timer1. Memory locations 000BH and 001BH in the interrupt vector table belong to timer0 and timer1, respectively.
Two interrupts are set aside for hardware external hardware interrupts. Pin numbers 12 (P3.2) and 13 (P3.3) in port34 are for the external hardware
interrupts INT0 and INT1, respectively. Memory locations 0003H and 0013H in the interrupt vector table are assigned to INT0 and INT1, respectively.

DC Motor:

DC motors are configured in many types and sizes, including brush less, servo, and gear motor types. A motor consists of a rotor and a permanent magnetic field stator. The magnetic field is maintained using either permanent magnets or electromagnetic windings. DC motors are most commonly used in
variable speed and torque.
Motion and controls cover a wide range of components that in some way are used to generate and/or control motion. Areas within this category include bearings and bushings, clutches and brakes, controls and drives, drive components, encoders and resolves, Integrated motion control, limit switches,
linear actuators, linear and rotary motion components, linear position sensing, motors (both AC and DC motors), orientation po


Reference: http://project-seminars.com/Thread-alcoh...z2I6HifNqv
 

Marked Categories : alcohol, alchol detector electrical project, components for alcohol detector miniproject, alcohol detector mini project, alcohol detector mini 1, electronic alcohol detector projects, an embedded system is some combination of computer hardware and, seminar on alcohol detector, alcohol detector, alcohol gas detectors using 555ic, alcohol detector engineers garage, news on alcohol detector, block diggram of ht12a ppt, alcohol detector applications, control many devices in common use today, seminar topics for alcohol dectector, project on alcohol detector, topic is alcohal detector, alcohol detector project, seminar topics on alcoholism, alcohol detector seminar,

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