Circuit Splash

Here is a simple audio amplifier circuit that is easy to build and has few components. This circuit is built around the LM386 (click for datasheet) audio amplifier integrated circuit, useful when you need to power medium sized speakers from a music player that can only drive earphones.

The TDA2030 IC is a powerful audio amplifier IC able to deliver up to 20W of output power, so you can use it to run a 4Ω speaker at 12W or a 8Ω speaker at 8W.

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.

Elevate your music with the GPD2846A TF Card MP3 Decoder Board 2W Amplifier Module. This module features GPD2846A decoding and 2W output amplifier, delivering clear and powerful sound for superior music enjoyment. Ideal for audio applications and DIY projects.

This Instructable is the project I built with a schematic from the IC datasheet and some parts I removed from an old CB radio. Before I call the project completed, I need to add a heat-sink to the amplifier IC and some vent holes in my project box. But as it is right now the amplifier works and sounds great.

DIY Bluetooth Speaker using the JDY-62 module and PAM8403 amplifier for clear, wireless audio. This simple project covers components, pinouts, wiring, and circuit setup, making it perfect for beginners learning basic electronics while creating their own portable speaker.

The BeetBox is a simple instrument that allows users to play drum beats by touching actual beets. It is powered by a Raspberry Pi with a capacitive touch sensor and an audio amplifier in a handmade wooden enclosure.

I wanted to make an audio player using an arduino but I didn't have an microsd card reader or an mp3 decoder chip.

As the name suggest 555 timer is basically a “Timer”, which create a oscillating pulse. Means for some time output pin 3 is HIGH and for some time it remains LOW, that will create a oscillating output.