Here is a schematic of a simple 555 organ circuit.The circuit is consist of two parts first 555 circuit of organ and second lm386 amplifier for driving 8 ohms speaker....
This is a project of a ding dong door bell circuit using 555 IC. The frequency of sound can be controlled with 5.6k and 10k resistors. The transistor 9013 is used....
This is a project of a 555 buzzer circuit. The circuit mentioned below will produce a buzzer sound when 9 volt power will be applied....
The circuit we are going to discuss here is a four siren sound generator using UM3561 IC which is a low power CMOS IC. The four different sounds can be...
Circuit of a 15x2 watt audio amplifier using TDA4935 IC. TDA 4935 is a stereo audio amplifer IC which supports two speakers output (15 watt each) and requires...
The circuit mentioned here is a small easy to build Intercom circuit using one LM386 IC one 2N3904 transistor and few other components. LM386 is...
Here is the circuit of 20W audio amplifier using LM1875 IC. LM1875 is a very high quality low distortion 20 Watt audio amplifer IC available...
TDA2822 is a audio amplifier IC available in 16 pin power DIP package. The operating voltage of the IC is from 3V to 15V DC. The IC can be operated in both...
Here is a good quality mini 2 x 22 watt stereo amplifier using TDA1554Q IC. TDA1554Q can be also used as 4 x 11 watt amplifier...
Here is the circuit of an UM66 melody with TDA2822M amplifier. UM66 is a very famous CMOS melody IC available in TO-92 transistor package...
Here is the circuit of a 1W mini stereo amplifier using TDA2822M IC. We often feel the requirements of headphone amplifier circuit for amplifying our small audio devices...
The LM380 2 watt audio amplifier circuit shown here is an easy to build circuit using only few external parts and able deliver 2W to 2.5 Watt output only on 10V DC...
Here is schematic of a quality voice amplifier circuit. The maximum output of the circuit is 10 watt and the minimum and maximum operating voltage is...
LM380N-8 audio amplifier circuit IC is an another 8 pin dip version of LM380N audio amplifier IC which is available in 14 pin dip package...
Here is a schematic of a beeper circuit. The circuit will generate a continuous beep-beep sound signal with flashing an LED...
The figure below shows a schematic of a very interesting sensitive mic circuit which will boost faint sounds from distance. The circuit is quite sensitive and provides good gain to weak audio signals...
Here is a very interesting project / schematic of a touch alarm circuit. The circuit is quite sensitive and it will activate a buzzer and an LED for a set time period when any one touches the metal plate...
Here is a project of a 555 touch alarm circuit with UM66 melody IC. The circuit will produce a melodious alarm sound for a set time period when someone touches the...
is a project of a 555 touch alarm circuit with UM66 melody IC. The circuit will produce a melodious alarm sound for a set time period when someone touches the...
Here is a project of TDA2822M BTL mode amplifier circuit. TDA2822M is a small audio amplifier IC available in 8 pin dip package. When building small battery operated...
The figure shows a very simple and easy to build hearing aid circuit using a TDA2822M audio amplifier IC and 2N4401 transistor...
The figure below shows a very useful project of a low Voltage 3W audio amplifier circuit using TDA7056A. The heart of the circuit is a TDA7056A BTL mono amplifier IC...
This audio activated relay switch circuit can be used for variety of audio related tasks. For example it can be used to start a recorder only when an audio signal is received...
Here is a project of a sound / audio level LED meter circuit. It can be used as noise meter, loudness meter, sound pressure or VU level meter and also for variety of...
This is a very sensitive sound switch circuit. It can detect sounds from many meters away and activate the relay switch and LED...
The figure below shows a very high quality buzzer / beeper circuit using 555 ICs. The circuit can provide variety of beeping sounds and also blink an LED...
The schematic below shows a very simple and good quality project of mains operated doorbell or door chime circuit. The circuit is using a UM66...
Here is a good quality and low cost project of a very loud 555 horn circuit. The circuit can be used as horn for bikes and other vehicles...
This is a circuit of an automatic ON OFF buzzer using 555 ICs. The circuit will produce a continuous beep beep sound through an 8 ohms speaker...
The figure below shows a very useful and interesting project of sound controlled toggle switch circuit. The circuit is quite sensitive and can detect low sound signals easily...
If you require a simple circuit for audio driven or reactive LEDs then this simple audio controlled LED circuit can do the job very efficiently and you can make...
This is a project of simple UM3561 loud siren sound circuit. This simple siren circuit can produce a quite loud sound in an 8 ohms speaker...
Here is a very useful project of an audio activated delay switch. The circuit can activate a relay switch for a preset time period...
By using some transistors and few discrete components a very effective LED audio VU level meter can be made. VU is stand for Volume Unit, volume unit meters are...
Here is a good designed diagram of a toy ambulance siren circuit using 555 ICs. The circuit is quite loud and can be operated with 6 to 12V DC...
The figure below shows a very useful project of a telephone ring tone generator circuit. The circuit can be used for many purposes like intercom bell, calling bell etc...
This is a project of a sensitive clap switch circuit. A clap switch circuit is always come in the category of very interesting electronic circuits, it is also a good learning...
The figure below shows a project of sound activated LEDs using CA3140 IC. The circuit will blink or flashes three LEDs according to the sound received by the electret mic...
The figure below shows a project of a 555 ultrasonic sound generator circuit. This circuit is very simple to build and using only few discrete components with the IC...
Here is a project of a sound direction finder circuit, we can also say it sound source detector or sensor. The circuit is very sensitive and able to detect the origin of...
This is a project of an electronic metronome using transistors. An electronic metronome is a device that is used by musicians. It produces a regular toc-toc beats...
Here is a very interesting project of a multi melody generator circuit using UM3481 IC. UM3481 is a mask-ROM-programmed multi melody generator...
Here is a circuit of a very good quality low noise mic amplifier circuit using TL071 IC. TL071 is a low cost high performance operational amplifier IC with...
This is a project of a low noise mic preamp with NE5534 IC. NE5534 is a low noise opamp IC manufactured in 8 pin dip package and designed to use in audio...
Here is a very interesting circuit of a 24W audio amplifier using a TDA1516BQ IC. TDA1516BQ is a class B audio amplifier IC available in 13 lead...
The figure below shows a project of a multi tone generator circuit. The circuit can produce different tones and can be used with any project where a tone...
This is a circuit of a very simple 2 x 40 Watt audio amplifier using TDA8560q IC. TDA8560q is a 13 lead SIL package IC...
Here is an interesting project of a multiple sound effect generator circuit. The circuit is using two ICs, which are MM5837 as IC1 and TDA2822M as IC2...
The figure below shows a simple mosquito repellent circuit. There are several techniques to get rid of mosquitoes. An electronic mosquito repellent...
This simple 10 watt siren enhancer circuit can amplify the output of any simple or small output siren to 10 watt. It can be used with many melody and siren generators...
Here is the project of a alarm circuit using CD4046 IC. CD4046 is a CMOS IC available in 16 lead packages. The IC can be used for many purposes for example tone...
The figure below shows a very useful project of a morse code practice oscillator circuit using a 555 IC...
This is a very interesting project of a simple electronic organ using transistors. The circuit can generate seven different tones and work like an electronic piano...
This article describes a project of simple piezo buzzer circuit using a piezo ceramic buzzer and few discrete components; the circuit will produce a loud tone...
This is a project of a sound controlled motor using an opamp and few other components. The circuit will activate a DC motor when the microphone used...
Here is a project of a adjustable buzzer using 556 IC. The circuit provides beep beep sound which can be adjusted with the two variable resistors used...
The figure shows a computer / PC audio amplifier circuit with preamplifier included. The circuit has some different features as compare to the normal computer speaker...
The circuit will activate a buzzer for few seconds when the microphone receives a sound. The sensitivity of the circuit is good and it can detect sounds of whistle, clap...
This is a project of a sound activated switch using LM386 IC. The circuit can activate a relay switch for few minutes when microphone receives any sound...
The figure below shows a very interesting project of a bird sound generator circuit using 555 timer ICs. An electronic bird chirping sound always get our attention in bells,...
This real bird sound generator circuit is built around three 555 timer ICs. The circuit will produce the real sound effects of a bird chirping...
Here is a very useful project of sequential sound activated switches. The circuit will activate four relay switches one by one when the microphone receive sounds...
Here is an easy to build 220V AC doorbell using a UM66 melody IC. The circuit is quite simple and low cost one but provides very good results. The circuit can also...
Here is a project of a VU meter using LM3914 IC. The circuit will display signal level of any audio equipment. For example it will display the audio level of your...
This article describes a project of a simple sound sensor switch circuit using a LM393N IC. LM393N is dual voltage comparator IC contains two...
This is a project of a sound sensor switch using lm358N IC. LM358N is a dual high gain opamp IC, contains two independent opamp in one package...
This is a project of a VU meter using LM358 ICs. The circuit is using four low cost LM358 operational amplifiers ICs and few other discrete components...
The figure below shows a project of a voice activated loud hailer circuit. The circuit can be used to amplify speeches. The circuit is a battery saver and can...
Here is a project of a 220V doorbell with mains absence backup. This doorbell will also run when the mains power is not present...
This door knock sensing doorbell will become activated when some one knock on your door. The circuit is simple and sensitive and can detect even a small knock...
This door knock sensing doorbell will become activated when some one knock on your door. The circuit is simple and sensitive and can detect even a small knock...
This door knock activated bird bell circuit can be used as a door bell to let you know if there is any visitor at your door...