- High-Fidelity Audio: Onboard NS8002 power amplifier chip delivers clear, amplified sound.
- Volume Control: Features an analog potentiometer knob for smooth and precise volume adjustment.
- Headphone Output: Includes a standard 3.5mm jack for connecting headphones or external speakers.
- Versatile Compatibility: Works seamlessly with 3.3V and 5V microcontrollers like the micro:bit and Arduino.
- Simple Interface: Designed with clear pin descriptions (3V3, GND, Signal) and options for connection via crocodile clips or PH2.0 wires.
- Efficient Power Management: Wide operating voltage range of 2.0V to 5.5V, optimized for portable, low-power applications.
AM-008 NS8002 Audio Amplifier Expansion Board – Compatible with Arduino, Micro:bit, BEC, Headphone Playback (3W Speaker Module)
| Operating Voltage | DC 2.0V – 5.5V |
|---|---|
| Amplifier IC | NS8002 Bridge Audio Power Amplifier |
| Output Power | Up to 3W (at 5V supply, 4Ω load) |
| Output Impedance | 4 ohms – 8 ohms |
| Frequency Response | 150Hz – 20KHz |
| Dimensions | Approx. 44mm x 37mm |
| Mounting Hole Diameter | 3.2mm |
| Connectivity | 3-Pin Header, Alligator Clip pads, 3.5mm Audio Jack |





- Connection: Connect the board to your development platform (micro:bit or Arduino) using the provided cables. Ensure the Signal pin receives the audio output from your microcontroller, 3V3/VCC receives power (within the 2.0V-5.5V range), and GND is grounded.
- Powering: The board operates off the power supplied by the development board or an external source connected to the VCC/GND pins.
- Volume Adjustment: Turn the onboard potentiometer knob clockwise to increase the volume and counter-clockwise to decrease it.
- Output Selection: If applicable, use the onboard switch to direct the audio output to either the integrated speaker or the 3.5mm headphone jack.
- Programming: For micro:bit, use the music blocks in MakeCode or relevant Python libraries. For Arduino, use tone() functions or audio libraries to generate the signal input.
Yes, the manufacturer provides a complete supporting manual with graphical routines for micro:bit, Python examples, and Arduino routines to help you get started quickly.
Yes, the board is compatible with both 3.3V and 5V Arduino development boards, thanks to its wide operating voltage range.
Yes, the expansion board comes with an integrated speaker module
According to NS8002 datasheets, the typical 3W output is achieved when the board is powered by a 5V supply and connected to a 4-ohm impedance speaker.
Yes, its robust design, safety features (integrated amplifier protection), and comprehensive resources make it highly suitable for STEM education and business prototyping projects. Please contact our sales team for bulk pricing options.
















