MR-BusIO-BUZZERTM BusIO BUZZER OUTPUT BOARD
User Manual
Copyright © 2007 MicroResearch
GRAVITECH GROUP WWW.GRAVITECH.US
GRAVITECH.US
uResearch
GRAVITECH GROUP
MR-BusIO-BUZZERTM BusIO BUZZER OUTPUT BOARD
User Manual
Copyright © 2007 MicroResearch
GRAVITECH GROUP WWW.GRAVITECH.US
The MR-BusIO-BUZZER is an Experiment
board for buzzer output. The input signal
is isolated from buzzer driver circuitry by
PC817 Photo-coupler IC.
The board can be use with MR-BusIO-
MAIN board or stand-alone. PCB size is
0.63” x 2.80”
The PC817 require at least 5mA to drive
input photo-coupler LED. It can take up to
6V in reverse bias. For an output
(between collector and emitter), it can
drive up to 35V with 50mA continuous
current.
The operation of this board starts when
applying logic HIGH to an I/O pin. The
indicator LED then illuminated. The output
of PC817 is driving second BC547
transistor which drive the output buzzer.
This board can be uses to make buzzer
sound.
The MR-BusIO-MAIN is available for
purchase via our website. If you don’t see
the item you need, please contract our
sales department at sales@gravitech.us
• MR-BusIO-MAIN
Experiment board which receives output
signals from any microcontrollers. The
signals then distribute to daughter boards
for each experiment. It designed to
connect directly with 10PIN MRconnect©.
It is a quick and easy way to control up to
8 daughter boards.
Description
MR-BusIO-MAIN
Operation:
MR-BusIO-BUZZERTM BusIO BUZZER OUTPUT BOARD
User Manual
Copyright © 2007 MicroResearch
GRAVITECH GROUP WWW.GRAVITECH.US
FIG 1: MR-BusIO-BUZZER Board Layout
FIG 2: MR-BusIO-BUZZER Schematic
MR-BusIO-BUZZERTM BusIO BUZZER OUTPUT BOARD
User Manual
Copyright © 2007 MicroResearch
GRAVITECH GROUP WWW.GRAVITECH.US
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