LM2904 Analog Decibel Detection Module Key benefits — why you need it Reliable soundlevel input for control and monitoring: converts acoustic intensity into a stable 0–2.3V analog signal so you can log, threshold or trigger actions in real time. Simplifies system integration: analog output and clear LED indicators make it easy to add sound detection to microcontrollers, industrial controllers or datalogging equipment. Better detection performance: built around the LM2904 operational amplifier with a lownoise design to improve sensitivity and reduce false triggers compared with basic sound sensors. What it does and how it solves problems Measures environmental sound intensity and provides a proportional 0–2.3V analog voltage suitable for ADCs and analog inputs, enabling precise level measurements and automated responses. Dual LED indicators provide immediate visual feedback for activity and status, speeding debugging and installation without extra tools. Stable transmission and robust signal output help maintain accuracy in noisy electrical environments and simplify calibration. Key features and attributes Model: LM2904 Analog Decibel Detection Module Analog output range: 0–2.3V Indicators: double (dual) LEDs for visual status Core component: LM2904 lownoise operational amplifier Integration: designed for easy connection to microcontrollers, data loggers and industrial control inputs Performance: sensitivity sound detection for realtime environmental noise control and soundactivated applications Practical applications (examples) Environmental noise monitoring: log decibel trends in offices, classrooms or outdoor areas for compliance or research. Soundactivated control: trigger alarms, lighting, or recording systems when ambient sound exceeds a threshold. Prototyping and research: integrate into electronics projects or experiments where precise, analog sound level data is required. Who it's for Electronics engineers designing sensing systems Hobbyists and makers adding sound activation to projects Environmental researchers and technicians needing a compact, analog soundlevel input Installation tips Feed the 0–2.3V analog output to an ADC or analog input within the acceptable voltage range. Use the LED indicators to verify detection and adjust mounting or sensitivity as needed. Place the module where it can capture representative sound for the application and minimize direct airflow or mechanical vibration near the microphone. This module delivers a compact, easytointegrate analog solution for accurate soundlevel detection using the LM2904 amplifier and dual LEDs for practical deployment in engineering, industrial, and research projects.