DIY - Audio Amplifier

The Idea

LM386 basically a low voltage audio power amplifier. It is suitable for battery-powered devices such as radios, guitar amplifiers, and hobby electronics projects. The IC consists of an 8 pin dual in-line package (DIP-8) and can output 0.25 to 1 watts of power, depending on the model, using a 9-volt power supply.

Now we are going to build a Simple Audio Amplifier.

1. Components

• LM386

• Capacitor 220 uF

• Resistor 10k

• Speaker

• Audio Jack

• 9V battery

2. Connections

LM386

• pin 1 => No connection

• pin 2 => 9v Ground (-ve)

• pin 3 => Resistor 10k

• pin 4 => 9v Ground (-ve)

• pin 5 => Capacitor +ve Terminal

• pin 6 => 9v battery +ve

• pin 7 => No connection

• pin 8 => No connection

Capacitor

• LM386 pin 5 => Capacitor +ve Terminal

• Negative Terminals => Speaker

Resistor

• LM386 pin 3 => Resistor 10k

• Resistor => Audio IN

3. Soldering

4. Testing

Thank You!