Audio Projects
3-Wire Electret Microphone Pre-Amplifier
OPA1692 Pre-Amp: Low-noise, 3-wire electret mic pre-amp.
Digitally Controlled Audio Processor using TDA7440
TDA7440 Audio: I2C-based Hi-Fi volume, tone, and balance control with selectable input gain.
Audio Limiter
Based on the NJM2761 chip, this adjustable audio limiter provides effective speaker protection by maintaining a low-noise output with a user-definable limit range of 0.2V to 1V across a wide DC power supply.
Current-to-Voltage Converter Circuit for Audio DACs
Many high-performance audio digital-to-analog converters (DACs) feature a current output that must be converted into a voltage output for use with audio amplifiers.
Stereo 2-Vrms Line Driver and Headphone Amplifier
This is a 2Vrms Pop-Free stereo line driver with a stereo headphone driver designed to allow the removal of the output DC-blocking capacitors for reduced component count and cost.
Stereo Audio Digital-to-Analog Converter Module
This is a breakout board for the IC PCM1795 stereo digital-to-analog converter (DAC), The DAC module accepts pulse code modulation (PCM) and direct stream digital (DSD) audio data formats, thus providing an easy interface to audio digital signal processors (DSPs) and decoder chips which will convert digital signal into analog signal.
Voltage Controlled Amplifier with Balanced Input
The project presented here is a Voltage Controlled Amplifier (VCA).
Voltage Controlled Amplifier – VCA
The project presented here is a Voltage Controlled Amplifier (VCA).
2.1 Channel Audio Processor with Subwoofer Output
This board is an Audio Processor built using PT2033 chip audio processor designed for versatile applications.
Hi-Efficient 20W Mono Class-D Audio Amplifier
This is a Hi-Efficient 20W mono Class-D audio amplifier, designed to drive speakers as low as 4 ohms in a bridge-tied-load configuration.
Stereo Audio Processor for Home TV Audio
This PT2315E IC-based audio processor is designed for versatile applications and includes master volume control with low-frequency loudness compensation, speaker output attenuator, and tone control.
3D Effect Audio Processor
The project presented here is a 3D sound processor, that regenerates 3D sound to stereo speakers.