Sound-activated switches are designed to provide a mechanism through which one can turn on or off any electrical appliance remotely through sound. Audio signal received through a microphone is amplified and compared with a specific … Read more
Audio Circuits
Ring tones in the old telephone sets and piezo buzzer in the current electronic telephone instruments are not so melodious. In order to make telephone ringtones soothing and pleasant to the ears. Here is a … Read more
Telephone Ringtone Generator Using 555 IC
The motor plays an important role in many engineering applications. People always search for an efficient and easy way to control these motors. There are many techniques available in both AC and DC to control … Read more
Simple Sound Controlled DC Motor using CA3140 IC
A volume unit (VU) meter is a device displaying a representation of the signal level in audio equipment. They are used in telephone installation and radio broadcast stations. Consumer audio equipment often features VU meters, both for utility purposes (e.g. in recording equipment) … Read more
LED Audio Level VU Meter Using Transistors
What is a Four Siren Sound Generator? A four-siren sound generator is a simple siren circuit that is mostly used in devices such as Police sirens, Fire engine sirens, Ambulance sirens, etc. It can produce … Read more
Four Siren Sound Generator using UM3561 IC | DIY Project
Audio conversion to light LED circuits converts sound energy from the environment to electrical energy. The circuit is a combination of transistors, resistors, capacitors, LEDs, and an electret microphone. Hardware Components The following components are … Read more
Audio Conversion to Light LED Circuit
The Loud Siren Circuit is able to produce Ambulance Sirens, Fire Sirens, Machine guns, and Police sirens with the help of switching. This loud Siren circuit has IC UM3561 which is a CMOS IC often … Read more
Loud Siren Generator using UM3561 IC
A very sensitive sound-activated LED circuit activates LEDs by even detecting distant sounds. This circuit here converts sound energy from the environment even with low tune to electrical energy. The circuit includes a combination of … Read more
Sensitive Sound Activated LED with 2n4401 Transistors
The sound effect generator is designed to produce multiple sound effects such as rain, waterfall, sea waves, wind river, etc. The circuit involves two ICs that are MM5837 as IC1 and TDA2822M as IC2. IC … Read more
Multiple Sound Effects Generator using MM5837 & TDA2822M IC
Morning/Sunrise alarm generates beep sounds and LED flashes according to the sunlight. The most fascinating aspect of this circuit is that the speed of the beeping signal and the blinking LED will slowly rise as … Read more
Morning Sunrise Alarm NE555 Timer
The sequential sound-activated switch is an electronic device that helps you to turn on or off switches without moving yourself. The sequential sound-activated switches are creative and work as sound detectors. It starts working when … Read more
Sequential Sound Activated Switches – Electronics Project
A real bird sound generator is an electronic circuit that makes the exact sound of a bird. It is a simple circuit that can be used in a wide variety of projects that need incredible … Read more
Real Bird Sound Generator Using NE555 Timer ICs
In this tutorial, we are going to make a project of sound-activated LEDs using a CA3140 IC. This circuit will blink/flash three LEDs according to the sound received from the microphone. You must have seen … Read more
Sound Activated LEDs Using CA3140 IC
This is a tutorial on an Ultrasonic sound generator. Ultrasonic waves are those sound waves whose frequency is greater than 20KHz. It is not audible to human beings but can be heard by animals. Ultrasonic … Read more
Ultrasonic Sound Generator using 555 Timer
Audio activated delay switch is a circuit that can activate a relay switch for a specific time period. For example, when we are listening to an FM radio station there’s a sudden increase in volume … Read more
Audio Activated Delay Switch Using Transistors – DIY Project
A sound-controlled toggle switch is a circuit that functions according to sound signals such as snapping fingers, a clap, or a whistle. This circuit is quite sensitive and can detect low sound signals easily. The … Read more