29-01-2013, 02:01 PM
MICROCONTROLLER BASED BLINDMAN STICK WITH IR SENSOR
[attachment=48724]
INTRODUCTION
In our real world we always see the blind people here and there. They face problems in crossing road or have problem of hitting against wall etc. The objective of the project is to make an advance stick for the blind person to face any interrupt.
Our module contains IR Sensor and Buzzer so that whenever there is any interruption it will produce noise. So that the blind man can easily knows that he is going to face any interrupt. In this project we are also using 89S52 microcontroller for controlling operations.
IR TRANSMITTER AND RECIEVER
IR transmitting and receiving unit have following components:
Op-amp
IR LED
IR Detector
FEATURES OF LM 358
Dual differential input operational amplifier.
Available in 8-Bump micro SMD chip sized package, (See AN-1112)
Internally frequency compensated for unity gain
Large dc voltage gain: 100 dB
Wide bandwidth (unity gain): 1 MHz (temperature compensated)
Very low supply current drain (500 μA)
Low input offset voltage: 2 mV
Input common-mode voltage range includes ground
Differential input voltage range equal to the power supply voltage
Large output voltage swing
FEATURES OF 8051 MICROCONTROLLER
4K bytes of Flash
128 bytes of RAM
32 I/O lines
Two 16-bit timer/counters
A five vector two-level interrupt architecture
Full duplex serial port
On-chip oscillator and clock circuitry.
[attachment=48724]
INTRODUCTION
In our real world we always see the blind people here and there. They face problems in crossing road or have problem of hitting against wall etc. The objective of the project is to make an advance stick for the blind person to face any interrupt.
Our module contains IR Sensor and Buzzer so that whenever there is any interruption it will produce noise. So that the blind man can easily knows that he is going to face any interrupt. In this project we are also using 89S52 microcontroller for controlling operations.
IR TRANSMITTER AND RECIEVER
IR transmitting and receiving unit have following components:
Op-amp
IR LED
IR Detector
FEATURES OF LM 358
Dual differential input operational amplifier.
Available in 8-Bump micro SMD chip sized package, (See AN-1112)
Internally frequency compensated for unity gain
Large dc voltage gain: 100 dB
Wide bandwidth (unity gain): 1 MHz (temperature compensated)
Very low supply current drain (500 μA)
Low input offset voltage: 2 mV
Input common-mode voltage range includes ground
Differential input voltage range equal to the power supply voltage
Large output voltage swing
FEATURES OF 8051 MICROCONTROLLER
4K bytes of Flash
128 bytes of RAM
32 I/O lines
Two 16-bit timer/counters
A five vector two-level interrupt architecture
Full duplex serial port
On-chip oscillator and clock circuitry.