Digitally Controlled Audio Processor using TDA7440
https://www.electronics-lab.com/project/digitally-controlled-audio-processor-using-tda7440/
TDA7440 Audio: I2C-based Hi-Fi volume, tone, and balance control with selectable input gain.
Audio Limiter
https://www.electronics-lab.com/project/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
https://www.electronics-lab.com/project/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. In premium automotive audio applications, for example, it is critical that the DAC signal-to-noise ratio (SNR) and total harmonic distortion plus noise (THD+N) performance is not compromised by the current-to-voltage (I-V) output […]
Voltage Controlled Amplifier – VCA
https://www.electronics-lab.com/project/voltage-controlled-amplifier-vca/
The project presented here is a Voltage Controlled Amplifier (VCA). A VCA board helps users control the Audio Level from a remote potentiometer. It requires a single-ended audio signal in the input. Gain control voltage can be adjusted through an on-board potentiometer or use an external potentiometer connected to CN4. The project works with a […]
2.1 Channel Audio Processor with Subwoofer Output
https://www.electronics-lab.com/project/2-1-channel-audio-processor-with-subwoofer-output/
This board is an Audio Processor built using PT2033 chip audio processor designed for versatile applications. It includes 3 stereo input selectors with internal gain and master volume control with low-frequency loudness compensation. It is capable of individual channel output volume adjustment and also tone control. The PT2033 is 2.1 CH Audio Processor with […]
Stereo Audio Processor for Home TV Audio
https://www.electronics-lab.com/project/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. It is a good solution for home audio signal processing. Due to the high-reliability requirement from the audio business, the PT2315E improves both audio performances and input surge current capability […]
3D Effect Audio Processor
https://www.electronics-lab.com/project/3d-effect-audio-processor/
The project presented here is a 3D sound processor, that regenerates 3D sound to stereo speakers. The board is able to regenerate 3D sound from a stereo audio input. It features of wide operating voltage range, wide dynamic range, and low output noise and is suitable for any audio application. This tiny module can add […]
Ground Isolation Audio Amplifier for Automotive Applications
https://www.electronics-lab.com/project/ground-isolation-audio-amplifier-for-automotive-applications/
This Ground Isolation Amplifier is developed for car and automotive applications. The board efficiently eliminates problems caused by wiring resistance and removes noise generated by other electrical devices used in automobile environment. In a car or automotive the audio system is grounded to the car body. For this reason, electrical noise generated by the car […]
Voice Echo Processor Module – Delay Device for Sound Effects, Echo, Reverb
https://www.electronics-lab.com/project/voice-echo-processor-module-delay-device-for-sound-effects-echo-reverb/
The voice echo or digital delay sound effects project presented here is suitable for applications such as Karaoke, multimedia, musical instrument effects, electronics toys, animatronics, etc. The project is based on PT2399 chip, with an operating supply of 5V DC, and approx. 30mA current consumption. Two potentiometers are provided to set the delay and repeat. […]
Mono 2W – Switch-Mode (Class D) Audio Power Amplifier
https://www.electronics-lab.com/project/mono-2w-switch-mode-class-d-audio-power-amplifier/
This is a compact size, mono, switch-mode (Class-D) audio power amplifier intended for multimedia and general-purpose high-power applications. It has greater than 87% efficiency and is capable of delivering 2W maximum continuous power to a 4Ω load. The project is designed to be driven by the line-out or headphone jack of a CD/MP3 player or […]