The LM386 Audio Amplifier Module is a compact, low-voltage audio amplification board designed for small speaker and audio signal amplification applications. Based on the popular LM386 IC, this module is ideal for battery-powered projects, DIY audio systems, intercoms, and embedded sound applications. It offers adjustable gain, low component count, and simple interfacing with microcontrollers and audio sources.
Core Module Overview
• Module Type: Low-power audio amplifier module
• Amplifier IC: LM386
• Amplification Type: Mono audio amplifier
• Intended Use: Small speaker and audio signal amplification
Electrical & Interface
• Operating Voltage: 4 V – 12 V DC
• Input Type: Analog audio signal
• Output Type: Speaker output
• Gain Control: Onboard potentiometer
• Connector Type: Screw terminal for speaker, pin header for input/power
Performance Characteristics
• Adjustable gain for volume control
• Low distortion at moderate volume
• Suitable for voice and basic music playback
• Optimized for low power consumption
Physical Characteristics
• Module Type: PCB-mounted amplifier board
• Form Factor: Compact and lightweight
• Controls: Onboard trimmer potentiometer
• Easy mounting and breadboard-friendly design
Compatibility
• Arduino Uno / Nano / Mega
• ESP8266 / ESP32
• Raspberry Pi (audio via DAC or PWM filter)
• MP3 decoder modules
• DIY audio and alert systems
Key Advantages
• Simple and reliable audio amplification
• Works directly with small speakers
• Wide operating voltage range
• Ideal for portable and battery-powered projects
Technical Insights
• Best suited for 4 Ω – 8 Ω speakers
• External capacitor improves bass response
• Avoid high input signal to prevent distortion
• Use proper grounding to reduce noise
Applications
• DIY audio amplifier projects
• Voice announcement systems
• Intercom and communication devices
• Educational electronics experiments
• Embedded sound and alert modules
Pro Tip
• Start with low gain and increase gradually
• Use shielded cable for audio input
• Add decoupling capacitor near power pins
• Keep input and output wires separated
Package Includes
• 1 × LM386 Audio Amplifier Module