Gravity: 386AMP Audio Amplifier Module (Arduino Compatible)

Audio amplifier module using LM386 chip offers 20 voltage gain, suitable for battery-powered setups. Connects to MIC or MP3 for sound expansion.

VCC
Module power supply input. DFRobot wiki specification states power supply 4-12V for the DFR0064 386AMP audio amplifier module.
Type · powerVoltage · 4-12V per DFRobot wiki specification
GND
Module ground / power return for the audio amplifier board.
Type · groundVoltage · 0V reference
IN+
Positive audio input into the LM386 amplifier; schematic exposes the amplifier input as IN+.
Type · signal
IN-
Negative / reference audio input into the LM386 amplifier; schematic exposes the amplifier input as IN-.
Type · signal
Speaker +
Amplified speaker output terminal. DFRobot wiki says the amplified sound is passed to the speaker and specifies an 8 ohm, 0.5W speaker load.
Type · signal

Start wiring

SPI · 4-12V per DFRobot wiki specification · 0V reference

Verify supply voltage and logic levels before powering up.

Module pins: VCC, GND, Speaker -, IN+, IN-, Speaker +. Schematik maps them to your board in the app.

Related groups

4 groups

Connectors

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Connectors & cables · Connectors · 28 parts

Displays

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Displays · TFT & LCD displays · 35 parts

Air quality

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MCUs and boards

ESP32, Arduino Uno, Raspberry Pi Pico, and compatible add-on boards for running builds.

Boards · Microcontroller boards · 29 parts

Pin	Type	Function	Voltage
VCC	power	Module power supply input. DFRobot wiki specification states power supply 4-12V for the DFR0064 386AMP audio amplifier module.	4-12V per DFRobot wiki specification
GND	ground	Module ground / power return for the audio amplifier board.	0V reference
IN+	signal	Positive audio input into the LM386 amplifier; schematic exposes the amplifier input as IN+.
IN-	signal	Negative / reference audio input into the LM386 amplifier; schematic exposes the amplifier input as IN-.
Speaker +	signal	Amplified speaker output terminal. DFRobot wiki says the amplified sound is passed to the speaker and specifies an 8 ohm, 0.5W speaker load.
Speaker -	ground	Speaker return terminal for the amplified output. DFRobot wiki specifies the external speaker load for the module.

Pinout

Start wiring

Connectors

Displays

Air quality

MCUs and boards