Audio VU/Sound Level Meter with LM339
AudioLed

Audio VU/Sound Level Meter with LM339

This is an “Audio VU Meter” or “Sound Level Meter”, it is a general-purpose bar-graph Audio VU meter designed for fun projects. All you need is to hook up one wire to the output of the audio amplifier’s speaker pin along with GND and see the magic. The response of the circuit...

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DIY: Build a controller with a knob that can easily change the volume of any app on your PC
Control

DIY: Build a controller with a knob that can easily change the volume of any app on your PC

Ruben Henares has designed a Maxmix controller with a stylist knob that could save us the stress of having to always go through the menus and on-screen sliders to change the volume of individual apps on our PCs. The knob on the controller takes an input from the encoder/button to...

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Free Elektor Project: Q-Watt Audio Power Amplifier
Audio

Free Elektor Project: Q-Watt Audio Power Amplifier

Good news for all audio enthusiasts: we are proud to present yet another all-analog circuit developed entirely in house. Despite the simple design of this audio power amp with just one pair of transistors in the output stage, Q-Watt can deliver over 200 quality watts into 4 ohms with...

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ATtiny85 Audio Sample Player
Mcu

ATtiny85 Audio Sample Player

While the ATtiny series of microcontrollers have been around for a long time, their popularity until recently was low. DIY enthusiasts and Professional designers now use them in diverse projects, most of which, in the past, would have featured an Arduino or a bigger MCU like the...

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World’s first fully self-contained Raspberry Pi audio HAT board with MERUS™ class D multilevel amplifier
Raspberry Pi

World’s first fully self-contained Raspberry Pi audio HAT board with MERUS™ class D multilevel amplifier

Infineon Technologies AG developed the world’s first fully self-contained Raspberry Pi audio amplifier HAT (Hardware attached on Top) board. It offers high definition audio at boom box power levels in a small form factor. The Infineon proprietary multilevel technology ensures minimum...

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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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New Arduino-compatible Music Visualizer board based on ATmega328p-au makes music really beautiful
Arduino

New Arduino-compatible Music Visualizer board based on ATmega328p-au makes music really beautiful

Music and Electronics end up beautifully when they are perfectly combined: if you are looking for a way to synchronize RGB LEDs to music, then you have a new tool in your hands. After releasing a detailed DIY report on how to create a music visualizer with an Arduino Uno and a Sparkfun...

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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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