M28 Audio Bluetooth Module

M28 Audio Bluetooth Module
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  • Product Code:SQ11475
  • Availability: 1000
  • $1.90
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  • Ex Tax:$1.90
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Tags: Bluetooth, audio module, stereo Bluetooth module M28

Description:
MH-M18/m28/m38 is a low power Bluetooth design solution that supports the latest Bluetooth 4.2 transmission, two channel stereo lossless playback and Bluetooth wireless transmission when the module is connected to Bluetooth, which is very convenient. In an open environment, the Bluetooth connection distance can be up to 20 meters.
Widely used in a variety of Bluetooth audio reception, a variety of DIY audio modification.
M28 module has headphone jack audio port for connecting headphone and 3.5mm audio device.

M28 Module:
Mute Control Terminal: Used to control the power amplifier board. When muting, muting produces a high level of 3.3v and produces a low level during playback.
Key Control: This function requires additional connection of resistors and buttons.
Volume off function: The default output is 100% volume. Press the button to control volume increase and decrease. If the control volume is less than 15%, the volume output will be 15% after feedback; if the control volume is greater than 15%, the original volume will remain unchanged after activation.

Pin Function Description:
1 key button: control terminal (4 button functions include additional resistors such as wiring diagrams)
2 MUTE: mute control terminals (Mute output high level 3.3V, output low level when playing)
3 VCC: positive power supply 5 V (lithium battery 3.7 V power supply requires short circuit diode)
4 GND: power negative/audio signal glands
5 L: left channel output
6 R: Right Channel Output

Application:
Conversion of old speakers into Bluetooth speaker
DIY Bluetooth speakers

Features:
Model: MH-M28
Bluetooth Version: Bluetooth 4.2
Operating Voltage: 3.7 ~ 5VDC
Max. Operating Current: 20mA
Broadcast status not connected: current is 5.5mA
Connection work status: 20mA
Deep Sleep: 3uA
Transmission distance: 20 meters
Operating Temperature: -40 to 85°C
Support WAV/WMA/FLAC/APE/MP3 lossless decoding, stereo two-channel output
Support Bluetooth Protocol HFPV1.7, A2DPV1.2, AVRCPV1.5, AVCTPV1.2, AVDTPV1.2
Maximum Transmission Distance of 20 meters.
Can be powered via a lithium Battery.
Sensitivity: -87dbm
Length: 45mm
Width: 20mm
Height: 2mm

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