Keyestudio SC8002B Audio Amplifier Module
$10.25 NZD
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$10.25 NZD
Keyestudio SC8002B Audio Amplifier Module
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Urban $66
Rural $88
Compact mono audio output module built around the SC8002B Class AB amplifier IC. Includes an onboard speaker and adjustable volume potentiometer — ready to add tones, alerts, and sound feedback to any 3.3V or 5V microcontroller project with just three wires.
Specifications
| Model | Keyestudio SC8002B |
| Amplifier IC | SC8002B (Mono, Class AB) |
| Operating Voltage | 3.3V – 5V DC |
| Signal Gain | ~8.5× |
| Interface | 3-pin header (S / V / G) |
| Volume Control | Adjustable potentiometer |
| Speaker Impedance | 8Ω (±15%) |
| Rated Power | 0.1W (max 0.15W) |
| Frequency Range | 800 – 4000 Hz |
| Resonant Frequency | 1500 Hz (±20%) |
| Sound Output | ≥80 dB @ 0.1W, 10cm, 1.5kHz |
| Operating Temperature | −20°C to +60°C |
| Weight | 3g |
Wiring
| S — Signal | PWM signal input from microcontroller (e.g. Arduino tone() pin) |
| V — VCC | 3.3V or 5V power supply positive |
| G — GND | Power supply ground |
Connect S to any PWM-capable digital pin on your Arduino and call tone(pin, frequency) to produce sound. Always set the onboard potentiometer to minimum volume before powering on — increase gradually once running. The signal input expects a PWM square wave, not a raw HIGH/LOW or analog audio line.
What's Included
| 1 × | Keyestudio SC8002B Audio Amplifier Module (speaker pre-installed) |
Common Uses
Tones and melodies via Arduino's tone() function
Audible alerts for sensor triggers and alarm systems
Sound feedback in robotics and interactive projects
Simple audio output when paired with a DFPlayer Mini
Interactive learning kits and STEM education builds
Button click sounds, error beeps and status chimes
Common Questions
Will this work with a Raspberry Pi or other 3.3V boards?
Yes — the module operates on 3.3V to 5V and is compatible with any microcontroller that can output a PWM signal, including Raspberry Pi, ESP32, and STM32 boards.
Can I play music or voice audio through it?
This module handles amplification only and is optimised for PWM square wave input. For MP3 or WAV playback, pair it with an audio source module such as a DFPlayer Mini.
The sound is distorted — what should I check?
Turn the potentiometer down before powering on and increase gradually. Feeding a full-strength signal into the speaker without care can cause distortion or damage the speaker cone.
Please note: Signal input expects a PWM square wave — not a raw digital HIGH/LOW or analog audio line. A basic datasheet is available at nznelectronics.co.nz