M5Stack ATOM ECHO – The Miniature Programmable Smart Speaker
Audio

M5Stack ATOM ECHO – The Miniature Programmable Smart Speaker

M5Stack ATOM ECHO is a tiny programmable smart speaker. Its design is based on the M5ATOM series of products. The slim design has a dimension of 24x24 and is 17mm in height. Its premium finish gives it a professional look and makes it easy to carry anywhere. M5Stack ATOM ECHO can be...

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Single-Ended, 2-Channel GaN Class D Amplifier – Evaluation Board
Audio

Single-Ended, 2-Channel GaN Class D Amplifier – Evaluation Board

The EVAL_AUDAMP24 e-mode GaN HEMT-based evaluation board from Infineon Technologies is a 2-channel, 225W/ch (4Ω at ±43V) or 250 W/ch (8Ω at ±63V) half-bridge class D audio power amplifier for high-end Hi-Fi audio systems. This evaluation board demonstrates how to use the IGT40R070D1...

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Phantom Powered Micro-Phone Pre-Amplifier using SSM2019
Audio

Phantom Powered Micro-Phone Pre-Amplifier using SSM2019

The project published here is based on SSM2019 IC which is a latest-generation Pro audio preamplifier. A female XLR connector is provided to connect differential Micro-phone. Circuit also provides Phantom power input, combining SSM preamplifier design expertise with advanced processing....

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U-AMP – open source versatile audio amp
Audio

U-AMP – open source versatile audio amp

An open source universal audio amplifier called ‘U-AMP‘ @ GmanModz, that is available on GitHub: Using what I learned getting digital audio working on each systems, I set out on a new project I would call “U-AMP” (Universal-Amp). This would be ONE pcb which has the features of...

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Free Elektor Article: Card Sound
Audio

Free Elektor Article: Card Sound

With a smartphone or an MP3 player it’s easy to play audio files, but generally not at room strength or if you can, only in wretched quality. The Card Sound project makes it possible to fill the room with music and have excellent sound reproduction! This lightweight and compact player...

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Stereo volume and balance control with Rotary Encoder using MAX5440
Audio

Stereo volume and balance control with Rotary Encoder using MAX5440

The project described here is a compact stereo volume and balance control with rotary encoder. It provides 32 log potentiometer steps with buffered wiper output. The project can easily replace mechanical potentiometer. 5 LEDs indicate the volume level or balance settings , depending on...

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USB Powered Audio Amplifier using MAX4298
Audio

USB Powered Audio Amplifier using MAX4298

USB powered mini speaker amplifier is conveniently powered by USB and it is simple to set up. USB powered speakers are convenient for listening to your media while at home or on the go. Conventional computer speakers that require an electrical outlet to work can be prohibitive because...

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Mini Speaker Attached Audio Amplifier using TS4871
Audio

Mini Speaker Attached Audio Amplifier using TS4871

This Mini Audio Power Amplifier is capable of delivering 1W of continuous RMS Output Power into 8 ohms load @ 5V. The Amplifier is built using TS4871 IC from ST.  This Audio Amplifier is exhibiting 0.1% distortion level (THD) from a 5V supply for a Pout = 250mW RMS. An external standby...

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