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Parameter Dimension
Specification Details
Product Model
A019
Product Weight
Cased weight: 13g — Bare PCB weight: 5g
Model Name
LM2904 Sound Detection Sensor Module (A019)
Core Components
56dB high-sensitivity microphone + LM2904 operational amplifier
Application Scope
Detect sound volume, intensity and presence; applicable to voice-controlled switches, sound alarm and other scenarios
Supply Voltage
5V (maximum rating ≤ 6V)
Signal Output
0~2.3V analog output
Status Indication
1-channel power indicator LED + 1-channel signal indicator LED
PCB Dimension
See attached drawing
Interface Type
PH2.0-3Pin terminal socket
Mounting Method
4 M3 screw positioning holes + 2 LEGO small brick positioning holes
Pin Definition
Signal Output (Analog) - S
VCC Positive Power Pin - V
GND Negative Power Pin - G
Optional Packaging Solutions
① Anti-static bag soft packaging ② White cardboard hanging box ③ Kraft paper box
