Amplificador De Audio Con LM386 Y Vumetro

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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

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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.

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