Manual

Microphone module
(Sound sensor module)
Working voltage: 3.3V~5V
Output type: Digital output, analog output
Interface mode: pH2.0~4P
Module size: 35*26.3mm
Module weight: 50g
Pin denifition:
DO Digital output
AO Analog output
- GND
+ VCC
24
Module description: Output module, digital analog interface. It acts as a microphone. It is used
to receive sound waves and display vibration images, but it can not measure the intensity of
noise. The sound wave makes the electret film in the microphone vibrate,resulting in the change
of capacitance, thus generating the corresponding change of micro voltage, which is received by
Ao analog output microphone's received sound signal in real time Do when the sound intensity
reaches a certain threshold, the low-level signal is output (which can be adjusted by R2 on the
module). Because the time of outputting the low-level signal is very short, in order to capture
useful information, information filtering or interruption is used to present, here information
filtering is used.
the data collector through digital / analog conversion, and transmitted to the control board.
Micro:bit
Example 1
code