MR-MINI-AUDIOTM Mini Audio Output BOARD
User Manual
Copyright © 2007 MicroResearch
GRAVITECH GROUP WWW.GRAVITECH.US
GRAVITECH.US
uResearch
GRAVITECH GROUP
MR-MINI-AUDIOTM Mini Audio Output BOARD
User Manual
Copyright © 2007 MicroResearch
GRAVITECH GROUP WWW.GRAVITECH.US
The MR-MINI-AUDIO is a mini amplifier
with speaker board that receives input as
the analog audio signal. The signal then
amplifies and sends out through speaker.
Moreover, there is a stereo jack that can
be interfaced with headphone or external
amplifier. PCB size is 2.20” x 1.70”
• Mini speaker model number PB-
2015
• Receive signal as analog input
• Auto-cut audio of speaker PB-2015
on board when stereo jack is
inserted.
• Amplifier circuit is using LM386 IC
• Adjustable gain of the amplifier
circuit
• Male and Female header inputs.
• Small in size
Description
Specifications:
MR-MINI-AUDIOTM Mini Audio Output BOARD
User Manual
Copyright © 2007 MicroResearch
GRAVITECH GROUP WWW.GRAVITECH.US
FIG 1: MR-MINI-AUDIO Board Layout
FIG 2: MR-MINI-AUDIO Schematic
MR-MINI-AUDIOTM Mini Audio Output BOARD
User Manual
Copyright © 2007 MicroResearch
GRAVITECH GROUP WWW.GRAVITECH.US
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