Clap switch by ajay & vinod
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Transcript of Clap switch by ajay & vinod
CLAP SWITCH
N. Ajay Kumar &A. vinod Kumar
E.C.E 2nd year B.TechM.L.E.C, S.Konda
Content…..• Meaning of clap switch• Basic concept of clap switch• Principle• Components• circuit diagram• Working• Merits • Demerits• applications
Meaning of clap switch
• Clap switch is a switch which can switch on/off any electrical circuit by the sound of clap (any type of sound)
Basic concept of clap switch
• The basic idea on clap switch is that the electric microphone pickup the sound of your claps , coughs & any type of sound to switch on/off the circuit
PRINCIPLE
• Convert the sound energy into electrical energy
Components
• Transformer• Microphone• Transistors• Relay• Resistors• Capacitors• Load
TRANSFORMERS
Transformers is a static device it transfers electrical energy from alternating circuit to another alternating circuit without changing the frequency
MICROPHONE
• Microphone is transducer which converts sound signal into electrical signals
• Microphone is used for acoustic signals.
TRANSISTOR
• Transistor is a 3 layers 3 terminal amplifying device.
• it raises the amplitude of weak signals without changing in it’s frequency.
RELAY
• Relay is electrically operated switch .
• It consists of operating mechanism to make or break the connection in electric circuit.
RESISTOR CAPACITOR • Resistor is passive component • Which oppose the flow of
current
LOAD
Load is electronic or electrical circuit or component it is connect to the output of the circuit
• Capacitor is a passive component
• Which consists of two conducting plates separated by a dielectric material
CIRCUIT DIAGRAM
Ranges of its values Resistors R1=15KO, R5,R6=1.5KO R2,R11,R12=2.2MO, R13=2.2KO
R3=270KO, R4=3.3KO R7,R8=10KO, R9,R10=27KO
Capacitors C1=1000µf/16v C2=.01µf,C3,C4=.047µf
Transistors Q1,Q2,Q3 = BC548 Q4 = BC368
Diodes D2,D3,D4= IN 4148 D1,D5=IN 4007
Transformer 12v/500mA
Microphone(MIC) Condenser Microphone
Relay 12V (capacity)
WORKING
• The sound of clap is received by a small microphone that converts the sound signal into electrical signal but output is very low
• Which is further amplified by the amplifier to amplifies weak signals received by the microphone the amplifier output connect to the bistable multi vibrator .
• The bistable multi vibrator also known as flip-flop circuit.• Flip-flop circuit consist of two transistors at a time only one
transistor conduct and another cutoff .• Thus the output of transistor either logic 0 or logic 1.• The pulse of clap which is trigger for flip-flop make changes to the
out put stages• The output of multi vibrator given to the relay. The output is logic 1 the relay is normally acts as a switch . So load is activated.
MERITS• Simple circuit• Energy efficient• We can turn ON/OFF by sound• Automatic turn OFF
DEMERITS• Transformer is used in this circuit.• So cost is high
FUTURE SCOPE• To increase the range of this equipment by using
better mic (microphone) • You can use this as a Remote controller
APPLICATIONS
The clap switch is generally used for• Light • TV • Radio • AC• Similar electronic device that the person will want to
turn ON/OFF