Presentation on theme: "ELECTRONIC STICK FOR BLIND PEOPLE"— Presentation transcript:
1ELECTRONIC STICK FOR BLIND PEOPLE Submitted By N. JayaprakashUnder guidance ofV. AnushaAsst. ProfessorInternal guideD. SudhakarAsst. ProfessorCo- ordinate
2INTRODUCTIONThe main aim of this project is to detect the obstacle in front of the electronic stick and giving the alarmThis will assist the blind persons during the walk and provides an alarm if any hurdle is detected with-In the set rangeThis system mainly consists of a regulated power supply, IR transmitter, IR receiver, control circuit and the output driver circuitThe IR sensor detects the presence of an obstacle in front of the person
3BLOCK DIAGRAM OF PROJECT BatteryRegulatedSupplyControlCircuitBuzzerSensorcircuitBlock diagram of project
4MAJOR COMPONENTS INFORMATION Integrated Circuit 555Light Emitting Diode (LED)TSOP 1738 IR receiverComparatorVoltage Regulator
5INTEGRATED CIRCUIT 555 1 2 3 4 5 6 7 8 VCC DISCHARGE THRESHOLD CONTROL VOLTAGERESETOUTPUTTRIGGERGNDIC555Pin diagram of IC 555Block schematic of IC555
6LIGHT EMITTING DIODA light-emitting diode (LED) is a semiconductor diode that emits incoherent narrow spectrum light when electrically biased in the forward direction of the pn-junctionParts of a LED
7TSOP 1738 IR RECEIVER This Tsop 1738 work as reciever Receives modulated infrared signal and converts into electrical signal.If IR LED (reciever) detects any hurdle in between of its line of sight communication then voltage across its output get low.If IR LED (reciever) does not detect any hurdle in the way of its line of sight communication then voltage across it remains high.
9COMPARATOR In our project we have used IC LM319 The LM319 is a dual high speed voltage comparator designed to operate from a single + 5V supply up to ±15V dual suppliesAll pins of any unused comparators should be tied to the negative supply. The LM319 series are high gain, wide bandwidth
10CIRCUIT DESIGN AND OPERATION REGULATED POWER SUPPLY CIRCUIT123vcc230V AC7805IN40072K47µF100µF
11CIRCUIT DIAGRAM AND ITS OPERATION 123vcc230V ACLM7805IN40072K47µF100µF76215483IC 555vccA54710nF100E220E1K5123vccTSOPO/P470E100µF45386101211TSOPO/PvccBuzzerIC31910K
12ADVANTAGESMultiplexers are used to sense obstacles in different directions simultaneously. This means, the blind person might receive different signals on obstacles in different directions around him.The moisture sensing electrodes sense the moist soil or stagnant water. This can be especially helpful during the rainy season. It also contains micro-switches, to detect manholes.
13FUTURE SCOPETechnology created reading machines, talking books, and computers that translate Braille.Communications technologies were easier to invent and consequently were brought to marketTechnologies available for blind navigation are insufficiently developed, adapted, and marketed.
14CONCLUSIONSElectronic walking stick for blind people helps the blind people when the obstacle occurs at in front the person.The stick gives signal to the person by buzzer sound or vibration when it detects the obstacle.Without the help of any other person the blind people can walk easily.
15Regulator Rectifier BLOCK DIAGRAM OF POWER SUPPLY 5V DC 230V AC TransformerRectifierFilterRegulatorBlock diagram of power supply
16INTEGRATED CIRCUIT 555IC555 timer IC along with Infra red LED which is going to transmit signalThis IC consists of two comparators that drive the set(S) and reset(R) terminals of a flip flop.The Q output is available as the overall output. Q' drives the discharge transistorThe reference voltage of comparator 1 is fixed at (2/3)V+ and that of comparator 2 is fixed at (1/3)V+.