Dec 18, 2010 regarding your second question, i have already given the schematic on the same page, see below the clap switch page, there is another schematic with the name, clap switch glowing 220v bulb. The above diagram show a typical microcontroller interface circuit using npn transistor. You can switch on and switch off the appliance at your room by simple clapping or by a sound. Here the simple circuit diagram of clap switch built using transistors. Different types of electronics and electrical projects and circuit ideas. All you need is to just clap or you can puff in front of the microphone and after that, the. A tutorial on how to make a clap switch circuit aka sound triggered led, along with detailed explanation on how the circuit works. These signals are then given to the transistor t1 base which in return trigger the ic1 pin2. It works as a switch which makes devices on and off by making a clap sound. You can see the connections in above clap on clap off circuit diagram.
The time for which the output stays high can be controlled by a suitable rc values. Although its name is clap switch, but it can be turned on by any sound of about same pitch of clap sound. To make the same circuit as mentioned above without ic 555 timer, we will have to use the following basic electronic components and devices. The clap sound sensed by condenser microphone is amplified by transistor t1. Clap switch circuit for devices circuit working and applications. We have previously built clap switch and clap on clap off. Dec 27, 2017 a tutorial on how to make a clap switch circuit aka sound triggered led, along with detailed explanation on how the circuit works. Mar 23, 2015 here the simple circuit diagram of clap switch built using transistors. Clap switch circuit on breadboard sound triggered led. And the point a is at high potential, and point a is connected to trigger pin 2 of 555 ic, as a result trigger pin 2 is also at high potential.
This paper presents the design of a clap activated switch device that will serve well in different phonocontrolled applications, providing inexpensive key and at the same time flee from false. Design of a clap activated switch leonardo journal of sciences. Since, the positive input is connected to the internal reference voltage source, gp1 pin can be used as a. The only unusual component is the single coil latching relay. Now, we are going to deal another circuit named clap switch circuit for devices. Simple clap switch circuit diagram using relay clap on. The transistor output is fed to the monostable circuit wired around ic 555. 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. Dec 20, 2015 this clap switch circuit using ic 555 is a hobby circuit, makes led to glow while you clap or make louder noise.
While there are numerous means of generating the latching function, the latching relay greatly simplifies the circuit and provides a relay contact interface for driving a 115 or 230vac load such as a light bulb. 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. In the first circuit, i will control a single relay using clap switch. Two transistors cross connected as a bistable multivibrator. Jan 05, 2019 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 switches onoff a white led or electrical appliances through claps. Using these circuits, you can control electrical appliances.
The power developed in a switching transistor is very small. The circuit will switch on the relay and an led when a loud sound is detected by the microphone for example clap, whistle or any other loud sound. Shadow sensors are widely used to detect the movement of a person. Browse through a total of 32 ic 741 projects circuits. The clap switch circuit is yet another simple and cool project. 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. The circuit changes its output state only when you clap twice within the set time period. Nov 22, 2011 this working of this circuit is based on amplifying natureof the transistor, switching nature of transistor, relay as anelectronic switch. How to make a clapclap on clapclap off switch circuit. Now the output of ic2 is given to the transistor t2t4 with the. The output will goes to high 1 for a certain time and it will come back to the low state. The pulse of clap, which is a trigger for flipflop makes changes to the output state that is complementary reverse. A clap switch circuit is a sound sensitive circuit.
This circuit can switch on and off a light, a fan or a radio etc by the sound of a clap. We have already seen the circuit diagram, working and applications of 9 way clap switch circuit. Design and construction of clap activated switch tomiwa a. A tutorial on how to make a clap switch circuit aka sound triggered led. Clap switch project report pdf ppt download abstract. Clap switch circuit diagram using ic 555 circuit digest. Clap switch using transistor circuit wiring diagrams. One of these transistors drives a heavier transistor which controls a lamp. 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. Simple clap switch circuit diagram 220v using relay. The clapping sound is converted into electrical energy by the microphone and amplified by transistor t1. We are going to use a mic and uno to sense the sound and trigger a response.
The basic action of the bc 549 transistor used for amplifier circuit in this design is to. A transistor that turns on fully and off fully is called a switch. Condenser mic basically converts sound energy into electrical energy, that in turns used to trigger 555 timer ic, through a transistor. Clap switch is a basic electronics miniproject, made with the help of the basic components.
Watch the video of clap switch circuit diagram project circuit description as shown in the circuit a very few number of parts is used including relay, transformer, condenser microphone, few transistor, a lamp etc. Clap switch circuit on breadboard sound triggered led youtube. This clap on clap off switch basically turns on or off the device, by using the clap sound, as switch. The sensitivity or range up to which the circuit detects claps. The main component of this clap switch circuit is the electric condenser mic, which has been used as a sound sensor. The amplified signal provides negative pulse to pin 2 of ic1 and ic2, triggering both the ics. This working of this circuit is based on amplifying natureof the transistor, switching nature of transistor, relay as anelectronic switch. 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 main component of the circuit is the electric condenser mic. I will present two circuits for clap switches, both of these circuits will be based on 555 ic and 4017 ic. I hope you understood, i want a one way clap switch circuit which only will trigger the load on.
When two transistors are crosscoupled in the form of a flip flop, any pulses entering the circuit cause it to flip and flop and the output goes high on every second pulse. Clap switch using transistor electronic projects, power. Circuit diagram of a clap activated switching device. Output of flipflop, which is in the low current form is unable to drive relay so we have used a current amplifier circuit by using q4 that is a common emitter circuit. When you clap once, the relay is activated and the light or any load is turned on. Before you make a circuit glowing 220v bulb, learn about relay, otherwise, it can be dangerous.
When the environment dark ldrs resistance become high. Regarding your second question, i have already given the schematic on the same page, see below the clap switch page, there is another schematic with the name, clap switch glowing 220v bulb. By default the output of this circuit will be low 0. To turn onoff any appliance, you just have to clap twice. Initially the transistor is in off state because there is not enough 0. This is a simple electronic project and mostly used to turn on and off ac appliances with the help of sound. You can use this circuit concept in many ways to activate sound based project. This circuit toggles the leds each and every time it detects a clap or tap or short whistle. Clap switch circuit for devices using 555 and 4017 circuit diagram. This construction will give mono pulse when trigger received from mic, the duration of pulse time varies respect to r2 and c2 connected with ic555. Simple clap switch circuit diagram using relay clap on clap. When you clap for the second time, the relay is deactivated and the light is turned off.
Share on tumblr this clap switch circuit using ic 555 is a hobby circuit, makes led to glow while you clap or make louder noise. Initially the transistor is in off state because there is. After a long experiment here we design and verified a clap switch circuit using few transistor. The decade counter, cd4017bc, used in this design is a 5. Pdf design of a clap activated switch researchgate. 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. Pdf this paper presents the design of a clap activated switch device that will serve well. Lecturer, department of physics and electronics, adekunleajasin university, akungbaakoko, ondo state, nigeria abstract a sound activated switch is a device that utilizes sound to control appliances. Aug 30, 2018 we have already seen the circuit diagram, working and applications of 9 way clap switch circuit. In this design, the output of a decade counter is used for a transistor switch that. We will use two basic clap switch circuit diagrams i. It is known as clap switch because the condenser mic. Clap on clap off switch circuit diagram using 555 timer ic.
In our circuit we left this pin as we have desire of only one ic in our circuit. Clap switch a mini project report submitted in the partial fulfillment of degree of bachelor of technology. The circuit presented here clap switch consists of silicon transistor and is divided in three main section i. You can see the circuits and connections in the above schematic diagram of clap switch. Design and construction of clap activated switch international. This is a simple clap switch circuit with high sensitivity. Resultwe constructed the circuit as per circuit diagram. Audio trigger stage is build around microphone and transistor t 1. Clap switch is an interesting hobby circuit which turns on the lights with a clap sound. Pdf clap switch a mini project report submitted in the. At the time when some one slap in front of the mic the sound signal is converted into the electrical signal by the condenser microphone. Mar 28, 2017 the above diagram show a typical microcontroller interface circuit using npn transistor. Clap on off switch with 4017 ic and bc547 transistor.
One small request, could you please link me to the page of a particular clap switch circuit where, 1. The circuit can sense the sound of claps from a distance of meters. This electric signal from the microphone is then amplified by using a transistor q1 as shown in circuit diagram. Clap switch has the ability to turn onoff any electrical component or circuit by the clap sound. The circuit is designed by using a transistor as a switch, to light the bulb in a bright environment and to turn it off in the dark and a lightdependent resistor ldr in the potential divider. Although its name is clap switch, but it can be turned on by any sound of approximately same pitch of clap sound. We have used a microphone which converts sound wave into an electric signal. In this project we are going to make clapper circuit using the concept of adc analog to digital conversion in arduino uno. The second 10uf is charged through the 5k6 and 33k and each time a sound is recognized by electret microphone, the negative excursion of the waveform takes the positive end of the. The electret microphone picks up the sound of your claps, coughs, and the sound of that book knocked off the table. Mar 21, 2018 simple clap switch circuit diagram 220v using relay.
How to use a transistor as a switch in different applications. A clap on clap off switch is an interesting concept that could be used in home automation. Working and schematic diagram of clap swith circuit. Dec 31, 2012 resultwe constructed the circuit as per circuit diagram. At the time you clapped in front of the microphone, pin 3 output of ic1 moves to high state and this is given to the pin 14 clock input of ic2. Electronics, circuit diagram, schematic diagram, electronics projects, diy projects, mini engineering projects. The circuit is divided in two stages the first stage is built with two 2n4401 transistors and second is built with 555 timer ic. The complete circuit diagram of this simple clap switch project is shown below. An example of a sound activated switch is the one that works by mere clapping. Ic1, commonly used as a timer, is wired here as a monostable multivibrator. It consists of condenser mic to pick sound of the clap and convert from sound energy to electrical energy which is then used to trigger 555 timer output where led is connected. A small condenser microphone is connected at the base of transistor t1, which is biased from resistor r1 10 kiloohms. It produces a small electrical signal which is amplified by the succeeding transistor stage. This means the circuit halves the input pulses and is the basis of counting or dividing.
How to make clap switch circuit using 555 timer ic homemade. Condenser mic picks up sound vibrations c by the clap. This circuit is constructed using basic electronic components like resistors. Simple clap switch circuit using transistors tested. 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. While traveling recently, my family had trouble powering the 5 smartphones, 2 tablets, and 2 laptops while driving.
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