LM386 Audio Amp

The LM386 is a classic, low-voltage audio power amplifier delivering up to 1 W of audio output from a single 5–12 V supply. This compact module makes it easy to add speaker output to any Arduino, ESP32, or microcontroller project without external power supplies or complex circuit design.

🔹 Key Applications

• Adding audio output to Arduino or ESP32 projects

• Driving small speakers in embedded devices

• Battery-powered radio and audio player circuits

• Alert tone and buzzer driver replacement

• Intercom and PA system amplifier stages

• Educational audio electronics experiments

🔹 Why Choose This Module?

• Low voltage operation (5–12 V) — runs from USB, Arduino 5 V, or 9 V battery

• 1 W output — sufficient for small 8 Ω speakers

• Minimal external components — works straight from the module

• Adjustable gain (20× to 200×) via bypass capacitor

• Decades-proven chip — fully documented and widely supported

🔹 Technical Specifications

• Chipset: LM386

• Supply Voltage: 5 V – 12 V DC

• Output Power: Up to 1 W

• Gain: 20× (default) to 200× (with capacitor)

• Load Impedance: 8 Ω (typical)

• THD: 0.2% at 125 mW

🔹 What's Included

1 × LM386 Audio Amplifier Module

🔹 Pro Tip

💡 Add a 250 µF capacitor between pins 1 and 8 on the LM386 to boost gain to 200× — useful for very weak input signals like those from small electret microphones. Keep signal wires short to minimise hum pickup.

⚠️ Note: Always ensure proper heat dissipation and correct voltage configuration before powering connected devices.