Lm386 Audio Amplifier Circuit

It can drive loads from 4 ωto 32 ω.

Lm386 audio amplifier circuit. The external parts shown on diagram 3 1 can be selected to get the desired gain. Lm386 is one of the important ic in audio field and is featured commonly for portable speakers and laptop speakers they can also be used in tv sound systems line drivers servo drivers ultrasonic drivers etc working of lm386 audio amplifier circuit. Circuit diagram of the lm386 based audio amplifier is shown in fig. The circuit c is not for voltage amplification but will raise the bass level by about 5 db.

Imagine you make an am receiver circuit. Flexible of choosing parts you can use similar devices. The audio amplifier using lm386 is a low power circuit that can deliver a maximum power of 1 watt 1w and can be used in a wide range of applications like portable speakers laptop speakers etc. One such simple audio circuit is proposed here using the ic lm386 which requires very few other external passive components for functioning.

With a 9v battery can listen sound for long. The lm386 is a mono low voltage amplifier that can be used in a variety of applications. Most of the component values in this circuit aren t critical. A great sounding lm386 audio amplifier.

The gain is internally set to 20 but it can be modified from 20 to. You can use this lm386 to amplify to a speaker 0 5w 2 inches. Now that you ve seen the bare minimum of what it takes to make an audio amplifier with the lm386 lets build a higher fidelity version with an adjustable gain control. It is built around popular amplifier lm386 ic1 an 8 ohm one watt speaker ls1 four capacitors and a few other components.

0 25w or 0 5w. Lm386 low voltage audio power amplifier 1 1 features 1 battery operation. Before moving into the circuit details let s have a peek at some of the technical specs of the ic. Schematic of lm386 audio amplifier circuit.

The ic lm386 is a power amplifier used for amplifying small audio signals with low supply voltages. Lm386 based audio amplifier. Pin diagram and circuit diagram of lm386 audio amplifier circuit. Lm386 is a low voltage audio amplifier and frequently used in battery powered music devices like radios guitars toys etc the gain range is 20 to 200 gain is internally set to 20 without using external component but can be increased to 200 by using resistor and capacitor between pin 1 and 8 or just with a capacitor voltage gain simply means that voltage out is 200 times the voltage in.

Circuit a will give a voltage amplification of 200. To instead each other. Circuit b will give a gain around 50. Lm386 audio amplifier image 1.