Pdf clap switch a mini project report submitted in the partial. Clap switch is a basic electronics miniproject, made with the help of the basic components. This working of this circuit is based on amplifying nature of the transistor, switching nature of transistor, relay as an electronic switch. Sensitive clap switch circuit d mohankumar 04242010. A clap switch circuit uses a microphone within the circuit to detect noises to. Olokede, seyi stephen 49 circuit is expected to respond to two claps only when it is received within three seconds to energize a relay which will make connection with an external circuit. How to use a transistor bc547 as a switch circuits diy. Clap switch circuit using bc547 transistor youtube. You can switch on and switch off the appliance at your room by simple clapping or by a sound. The power developed in a switching transistor is very small.
If you want to design a switch circuit to turn on and turn off without reach a physical switch then try this simple clap switch circuit with relay, this circuit is designed with timer ic 555, dual d flip flop ic 7474 and a electromagnetic relay. It is a versatile module, because you can use it for testing several electronic components, such as, relay, reed switch, light dependent resistorldr, electret microphone, phototransistor, photodiode, etc. Clap switch is a basic electronics mini project, made with the help of the basic components. Introduction clap switch is an beginners project done using 555 timer ic. Output of flipflop which is in the low current form is unable to drive relay directly so we have used a current amplifier circuit by using q4 which is a common emitter circuit. Also, individuals will get to see exactly how you can turn things on by a simply clap, snap, andor the use of the voice. Besides, you can use this module for making simple clap switch, light operated switch, water level indicator, etc. This clap on clap off switch basically turns on or off the device, by using the clap sound, as switch. The pulse of clap which is a trigger for flipflop which makes changes to the output which is complementary reverse. One of these transistors drives a heavier transistor which controls a lamp. This circuit can switch on and off a light, a fan or a radio etc by the sound of a clap this circuit is constructed using basic electronic components like resistors, transistors, relay, transformer, capacitors.
It switches on and off electrical appliances with a. Objective individuals will construct a clap switch circuit and gain based knowledge on the 555 timer ic, bc547 transistor and the condenser microphone. Dark sensor using ldr, a latch circuit using ne555 timer, astable circuit using ne555 timer, a clapswitch circuit using ne555 timer. It produces a small electrical signal which is amplified by the succeeding transistor stage. In the circuit the electrolytic capacitor is used as a bypass capacitor. This circuit can switch on and off a light, a fan or aradio etc by the sound of a clap. Components of clap activated switch the clap activated switch makes use of certain components to achieve its purpose. Condenser mic basically converts sound energy into electrical energy, that in turns used to trigger 555 timer ic, through a transistor. Switching state happens very quickly the 2n3904 takes at most 50 ns about 5 hundredthousandths of a millisecond. Microphone, resistors, capacitors, transistors, ics, relay a microphone a microphone converts sound waves to electrical audio waves of the same frequency and relative amplitude.
Audio trigger stage is build around microphone and transistor t 1. The fundamental concept of the clap switch is microphone received the sound of the clap or any. One more plus point of this circuit is that there is no fear of the electrical shocks as you are not required to touch any of the mechanical switches physically. An electret microphone or simply mic obo04fn0b is used for this purpose. In the above explanations we learned a simple clap activated switch circuit which incorporated an ic for implementing the desired onoff toggling actions. Some circuits use tun for transistor universal npn and this is the same as our reasoning the transistor type is just to let you know it is not critical. The present design uses a different principle and utilizes only transistors for the above triggering actions. Clap switch circuit using 555 and 4017 in the first circuit, i will control a single relay using clap switch. Build simple transistor circuits homemade circuit projects. Mini project report sound operated clap switch submitted in the partial. This is the system of a very sensitive clap switch.
This circuit is constructed using basic electronic components like resistors, transistors, relay, transformer, capacitors. Besides, you can use this module for making simple clap switch. When you clap for the second time, the relay is deactivated and the light is turned off. Lab report of clap switch mct122 warning tt undefined function. The clap activated switch makes use of certain components to.
Now the output from the transistor t1 is supplied to the monostable circuit which connects to ne555 ic. Transistor switches can be used to switch a low voltage dc gadget e. A clap switch circuit is a sound sensitive circuit. Working of transistor as a switch npn and pnp transistors. High sensitive clap operated switch circuit without microcontroller. Clap switch is a device which converts the sound vibrations into. This is a simple clap switch circuit with high sensitivity. The kit has four different circuits that can be switched on separately or together at a time using a dip switch. So, it is amplified using another transistor and given to relay, it acts as a mechanical switch. Imagine the panic situation in the midnight when an intruder tries to break into the house. A transistor is a device mostly used for switching purposes.
Top10 electronic circuit diagram for beginners the following electronic circuit diagrams very simple, useful, and can be made by any beginner. We will use two basic clap switch circuit diagrams i. Condenser mic basically converts sound energy into electrical energy, that in turns used to trigger ic 4017, through a transistor. This circuit will turn on or turn off the load connected with relay when you clap or make louder sound trigger to this circuit, a simple condenser mic. The circuit can sense the sound of claps from a distance of 12 meters. In a flipflop circuit, at a time only one transistor conduct and other cutoff and when it gets a trigger pulse from outside source then first transistor is cutoff and 2nd transistor conducts, thus output of transistor is either logic0 or logic1 and it remains in one state 0 or 1 until it gets trigger pulse from outer source. Clap switch has the ability to turn onoff any electrical component or circuit by the clap sound. Conditions 2 and 3 assure that the transistor will be driven into the saturation region. In the circuit, i will control a single relay using clap switch. This circuit having multiple sections and having more components than the first circuit, we start with the power supply block having transformer and rectifier block, then we have the q1 transistor, when we produce a clap sound it will sense by the mic and produce equivalent electrical energy and pass towards the transistor q1 and output.
It switches onoff electrical appliances through claps. This circuit can switch on and off a light, a fan or a radio etc by the sound of a clap. In both digital and analog domains transistors are substantially used for exceptional utility usage like amplification, logic operations, switching and so on. Nov 25, 2012 the clap switch requires a transducer at the input to convert sound vibrations from clapping hands into electrical energy. The sound of clap is received by a small microphone that is shown biased by resistor r1 in the circuit. This article mainly concentrates and offers a quick clarification of the transistor application as a switch. Using these circuits, you can control electrical appliances by simple clapping.
This circuit is constructed using basic electronic components like resistors, transistors, relay,transformer, capacitors. How to make a clapclap on clapclap off switch circuit. This working of this circuit is based on amplifying natureof the transistor, switching nature of transistor, relay as anelectronic switch. Dark sensor using transistor, phototransistor and photodiode. In practice, even in cutoff there is some small leakage current through the transistor. Hello friends, today in this video ive shown how to make a simple clap switch using only transistor. In most cases the ic will contain 10 100 transistors, cost less than the individual components and take up much less boardspace.
In this transistor circuits ebook, we have presented about 100 interesting circuits using transistors and chips. The 555 timer is a very versatile 8pin, which can be configured with a. Simple clap switch circuit diagram using relay clap on. Simple clap switch circuit using transistor youtube. Ics are separate fully and functioning packages and contain inbuilt active. Electronics mini projects simple electronics electronics basics electrical engineering books electrical projects electronic engineering simple electronic circuits electronic circuit design diy heater. This is a project on clap switch which can switch onoff any electrical circuit by the sound of. Clap switch using arduino use arduino for projects. Electronics, electronic circuit diagram, schematic diagram. In the above explanations we learned a simple clap activated switch circuit which incorporated an ic. Microphone changes the sound of a clap in electrical signal and is given to base of.
In a flipflop circuit, at a time only one transistor conduct and other cutoff and when it gets a trigger pulse from outside source then first transistor is cutoff and 2nd transistor conducts, thus output of transistor is either logic0 or logic1 and it remains in one. On clapping there will be a peak signal at the mic which is much higher than normal, this signal is fed to the amplifier, though a high pass filter. The circuit presented here clap switch consists of silicon transistor and is divided in three main section i. Pdf design and implement clap switch with light researchgate. The circuit uses a 555 timer ic and transistor bc547 for its operation. Simple clap switch circuit using transistors tested. The microphone output is amplified by a transistor. Inside a flipflop circuit, at any given time just one transistor triggers while the other remains cutoff and once it receives a trigger pulse coming from external source subsequently 1st transistor gets switched off and 2nd transistor is activated, therefore output of. The output from the mic is very low in magnitide and so we need an amplifier circuit to boost the detected sound signal. Design of a clap activated switch leonardo journal of sciences. Dec 31, 2012 one of thesetransistors drives a heavier transistor which controls a lamp. Hi friends in this video im going to show you how to make a clap switch. Clap switch circuit for devices circuit working and.
Pdf clap switch a mini project report submitted in the. The main component of the clap switch is the condenser mic which works as a sound sensor in this circuit. Clap switch controller by using ic555 timer ssrgjournals. Jan 17, 2019 today we are going to make a simple clap switch circuit. This circuit has been constructed using basic electronic components like resistors, transistors, relay, transformer, capacitors. Circuit diagram components required 555 ic cd4017 ic relay.
This is a simple 4in1 doityourself diy kit from buildcircuit. The main component of this clap switch circuit is the electric condenser mic, which has been used as a sound sensor. Apr 28, 2017 this clap on clap off switch basically turns on or off the device, by using the clap sound, as switch. Condition 1 guarantees that the circuit is driven into the cutoff region by the input. As one of the sizable semiconductor devices, the transistor has found use in great digital applications such as embedded systems, digital circuits, and control systems. Simple clap switch circuit diagram using relay clap on clap. Sep 12, 2018 using a transistor as a switch has some advantages. In a flipflop circuit, at a time only one transistor conduct and other cutoff and when it gets a trigger pulse from outside source then first transistor is cutoff and 2nd transistor conducts, thus output of transistor is either logic0 or logic1 and it remains in one state 0 or 1 until it gets trigger pulse from outer. This versatile dark sensor is made up of two transistors.
The electret microphone picks up the sound of your claps, coughs, and the sound of that book knocked off the table. When you clap once, the relay is activated and the light or any load is turned on. Two transistors cross connected as a bistable multivibrator change state at each. We have previously built clap switch and clap on clap off switch, using 555 timer ic. Leds on or off through the use of a transistor in its saturated or cutoff state. Feb 18, 2021 2 clap switch using transistors or bjts. All you need is to just clap or you can puff in front of the microphone and after that, the device attached to the microphone becomes on or off. An actual bjt switch differs from the ideal switch in several aspects. I will present two circuits for clap switches, both of these circuits will be based on 555 ic and 4017 ic. Aug 30, 2018 now, we are going to deal another circuit named clap switch circuit for devices.
It switches onoff a white led or electrical appliances through claps. They also save a lot of circuit designing and quite often consume less current than discrete components. It converts sound energy into electrical energy which then raises the potential at the base pin and turns on the transistor. At the time you clapped in front of the microphone, pin 3. Clap switch is an interesting hobby circuit which turns on the lights with a clap sound. In a flipflop circuit, at a time only one transistor conduct and other cutoff and when it gets a trigger pulse from outside source then first transistor is cutoff and 2nd transistor conducts, thus output of transistor is either logic0 or logic1 and it remains in one state 0 or 1. Design and construction of clap activated switch international. Pdf design of a clap activated switch researchgate. Analysing efficiency and effectiveness of clap switch mechanism. Clap switch circuit for devices using 555 and 4017 clap switch circuit summary if you wish to on and off the device without moving from your place, then this circuit is helpful for you. Mar 21, 2018 simple clap switch circuit diagram 220v using relay. Clap activated switch is an electronics device that can switch on and off a light, fan, radio or any other appliance by the sound of clap. This means you can use any npn transistor, such as 2n2222, bc108, 2n3704, bc337 and hundreds of others. Therefore a stepdown transformer 12v300ma is employed.
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