Amplificador De Audio Con LM386 Y Vumetro

About: Electronics Hardware Designer RF & Antennas - PCBs & Manufacture

Este es un amplificador de audio de costo reducido y de prestaciones aceptables para un dispositivo portable (1W sobre 8Ohm). Cuenta con un amplio rango de tensión de alimentación que puede barrer fácilmente los 5 a 12V, lo que nos permite alimentar este circuito desde un simple puerto USB o un PowerBank.En este caso se ha implementado un filtro pasa bajos para re-alimentar los grabes del circuito y generar una suerte de Bass Boots, de esta manera podremos limpiar un poco el ruido y aumentar un poco los grabes.También se ha implementado un vumetro para visualizar los niveles de volumen de audio, se ha implementado un circuito integrado de muy bajo costo que nos proporciona hasta 5 niveles de visualización con LEDs.Este vumetro KA2284 puede ser cambiado por sus reemplazos directos como AN6884, LB1403 y BA6124.

El PCB (puede descargar el proyecto entero en el siguiente link

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: Little Power Amplifier With LM386 and Vumeter

This is a low cost audio amplifier with acceptable performance for a portable device (1W over 8Ohm).

It has a wide range of power supply that can easily sweep 5 to 12V, which allows us to power this circuit from a simple USB port or a PowerBank. In this case a low pass filter has been implemented to re-feed the grabs of the circuit and generate a sort of Bass Boots, in this way we can clean the noise a bit and increase the grabs a bit. A vumetro has also been implemented to visualize audio volume levels, a very low cost integrated circuit has been implemented that provides us with up to 5 levels of visualization with LEDs. This KA2284 vumeter can be exchanged for its direct replacements such as AN6884, LB1403 and BA6124.

Be the First to Share

    Recommendations

    • Made with Math Contest

      Made with Math Contest
    • Multi-Discipline Contest

      Multi-Discipline Contest
    • Robotics Contest

      Robotics Contest

    Discussions

    None
    seamster

    1 year ago

    Hello there!

    We're glad you want to share something with the Instructables community!

    And we’re here to help you out.

    Due to some recent changes on the site, we are no longer able to publish stand-alone videos and other forms of incomplete posts. In order to be published live on the site, Instructables must consist of the following things:

    - Multiple steps showing how you made your project

    - Written instructions in each step

    - Your own original images

    Beyond making your Instructable simply publishable, this guide (https://www.instructables.com/id/How-to-Create-a-Feature-Worthy-Instructable/) explains what is required to have your Instructables featured by our site editors. It’s very helpful, and definitely worth checking out.

    We would love to review your project again after you have made the necessary edits, and we will publish your project if it is eligible.

    If you have any questions, please feel free to ask right here or send us an email at service@instructables.com.

    Best,

    Instructables Community Manager