Headphone Audio Amplifier Circuit on PCB using LM386

In this project, we have made a headphone/audio amplifier circuit on PCB using LM386. We often use a self-designed PCB to make a Headphone/Audio amplifier. This project is specially designed to enhance the audio from the microphones. Still, it can also be sent by activating a few jumpers that can amplify the subwoofer or the speaker’s efficiency.

If we choose earpieces with our speaker recording like the phone or tablet, laptop, Radio, and sometimes the influence is suitable for new bloggers, but it’s not enough for loud and annoying music lovers. We have developed this efficient hobby device, namely a headphone amplifier, to resolve conflicts. This circuit can also be used as an audio amplifier to enhance the subwoofer’s output and is powered by a portable device to be transmitted anywhere and by the user.

Hardware Component

The following components are required to make Headphone Audio Amplifier Circuit

S.no	Component	Value	Qty
1.	Electrolyte Capacitor	10uF, 100uF, 220uF	4, 3, 2
2.	Ceramic Capacitor	100nF	4
3.	LED	–	1
4.	Power Supply	–	1
5.	Bergsticks	–	1
6.	Resistor	1k, 22k, 100k, 10R	1, 2, 2, 2
7.	Audio Jack male/female	3.5 mm	2
8.	IC	LM386	2
9.	Fabricated PCB board	–	1

LM386 Pinout

For a detailed description of pinout, dimension features, and specifications download the datasheet of LM386

Headphone Audio Amplifier Circuit

Working Explanation

This amplifier is made by using the LM386 Audio Amplifier. This circuit is used to support the device to operate a subwoofer speaker or regular speaker (4 ohms) just to get a tremendously loud explosion through the speaker as well as a headphone amplifier. So, We’ve used triple jumpers to adjust it between these two different modes. Thus if the operator wants to drive a subwoofer mic, he/she always has to configure these jumpers. We used 2 LM386 here, and users can operate this circuit with 3 volts to 9 volts. In four trials, we distinguish the jumpers layout below to drive the handset or microphone with low or high savings.

Applications and Uses

Practically, the desktop computer to use with features such as iRig is low in addition to preventing. The audio amplifier circuit uses an IC, but it’s not a professional-grade music producer converter.