DC 7-12V TDA7440 ST7735 Audio Distributor 4-Channel Stereo Sound Digital Audio Module Board

Semi-finishedproduct : No Data Record : No High-concerned chemical : none Electronic : No Material : COTTON Size : As Description Type : Amplifier Board Model Number : l Audio Module Board DIY Supplies : Electrical Brand Name : Aideepen Origin : Mainland China Output Voltage : As Description Style : As Description Certification : NONE Condition : New Type : ST7735 Audio Module Key Word : Audio Module Board Dropship : Support

DC 7-12V TDA7440 ST7735 Audio Distributor 4-Channel Stereo Sound Digital Audio Module Board Product Features:

1. Equipped with a TDA7440D chip, I2C digital volume control with 0-100 levels of wear-free switching and noise-free operation.

2. Treble and bass adjustable in ±14dB segments, independent left and right channel balance, stable and precise tuning accuracy.

3. One-button switching for four stereo sound sources, with built-in fade-in and fade-out buffers, eliminating popping noise throughout the switching process.

4. Tuning parameters are automatically saved after power failure, eliminating the need for repeated settings upon power-on, and are displayed in real-time on the ST7735 screen.

5. Compatible with home amplifier upgrades, car audio systems, desktop HiFi devices, and multimedia player audio control.

Product Overview: This module uses the TDA7440D chip as its core, achieving high-precision audio control through an I2C digital interface, replacing traditional analog potentiometer solutions. The TDA7440 digital audio controller is an I2C digital audio processing module based on the semiconductor TDA7440D chip. All parameters are adjusted digitally, completely eliminating the carbon film wear and noise problems of traditional potentiometers.

Applicable scenarios: Pre-amplifier audio processing, desktop speaker control, DIY amplifier setup, audio matrix switching. This data package includes the TDA7440 audio controller hardware module, along with the chip datasheet, sample code, and complete user manual.

Main Functions: * Digital Volume Control — 0~100 levels, no carbon diaphragm wear, no noise * Bass/Treble Adjustment — ±14dB, 2dB per level * Left/Right Balance — Independent channel attenuation * 4-Channel Source Switching — With fade-in/fade-out transition, eliminating popping sounds * Parameter Power-Off Memory — Automatically saved, restored upon power-on * ST7735 Color Screen Display — Real-time status clearly displayed * Cross-Platform Compatibility — Supports NANO (AVR) and ESP32

Product Specifications: * Power Input: DC 7-12V * Audio Input: 4-channel stereo (RCA / 3.5mm) * Audio Output: 1-channel stereo * Volume Range: -55dB ~ +30dB * Tone Range: ±14dB * Channel Separation: > 90dB * THD+N: < 0.01% * Power Consumption: < 2W * Control Protocol: I2C (address...) (0x44) Screen: 1.8-inch ST7735 SPI LCD label:yes