In this DIY project tutorial, we will show you how to fabricate a sound-activated LED deploying an LM386 sound amplifier IC. The LM386 is an all–in–one Class-AB Audio Amplifier IC that can be utilized in an assortment of applications. LM386 IC has been being used for a considerable length of time, as yet being utilized as an Amplifier in Computer speakers and Portable Stereos. LM386 is a low-power sound amplifier IC utilizes for numerous sound tasks.
The IC can likewise be utilized to make a good-quality sound detector or sensor circuit. The circuit will blink an LED on any sound like a whistle, clap, human voice, sound system, or cellphone ring when the circuit is close to the mobile phone.
Hardware Components
The following components are required to make Sound Activated LED Circuit
| S.no | Components | Value | Qty |
|---|---|---|---|
| 1. | Audio amplifier IC | LM386 | 1 |
| 2. | Electret Mic | – | 1 |
| 3. | Battery | 9V-12V | 1 |
| 4.. | LED | – | 1 |
| 5. | Resistor | 10K, 1K, 390Ω | 1, 1, 1 |
| 6. | Electrolytic Capacitor | 10µF, 100µF | 1, 1 |
| 7. | Ceramic Capacitor | 100nF | 1 |
LM386 Pinout
For a detailed description of pinout, dimension features, and specifications download the datasheet of LM386
Sound Activated LED Circuit
Working Explanation
The core of the circuit is an LM386 IC. The circuit is simple and economical to fabricate. It is utilizing barely any costly components and all the components are easily accessible in the market. The working operation of the circuit is simple and straightforward, the electret mic gets the sound signals and converts these sound signals into electrical signals these electrical signals are intensified by the LM386 IC and originate from its pin5. This actuates the LED associated with its pin5 through a 100µF capacitor. The working voltage of the circuit is 9V to 12V DC.
Applications and Uses
- The LM386 Audio Amplifier Circuit can be utilized for recording the sound signal through microphones, assembling small speakers, FM Radio Devices, and so on.
- LM386 is now one of the significant IC in the sound division and highlights usually convenient speakers and laptop speakers.
- They can likewise utilize in TV Sound Systems, Line Drivers, Servo Drivers, Ultrasonic Drivers, and so forth.
- The LM386 Audio Amplifier Circuit utilizes for recording voice from the microphone, assembling small speakers, FM Radio Devices, and so on.
