MR-BusIO-SWTM BusIO Push Button Switch Input BOARD
User Manual
Copyright © 2007 MicroResearch
GRAVITECH GROUP WWW.GRAVITECH.US
GRAVITECH.US
uResearch
GRAVITECH GROUP
MR-BusIO-SWTM BusIO Push Button Switch Input BOARD
User Manual
Copyright © 2007 MicroResearch
GRAVITECH GROUP WWW.GRAVITECH.US
The MR-BusIO-SW is an experiment
board for receiving input from push button
switch. When the switch has been
pressed, the indicator LED is illuminated
and status on I/O pin is LOW. Moreover,
user can add DS18S20 IC, 1-Wire Digital
Thermometer onto the board. It can send
the temperature value via 1-Wire bus
system to microcontroller (optional). It is
best for sensing switch input and
temperature reading.
The board can be use with MR-BusIO-
MAIN board or stand-alone. PCB size is
0.63” x 2.80”
There are three ways to use this board:
As a switch input: When user press the
switch, logic LOW is apply at the I/O pin.
The indicator LED is also illuminated. I/O
pin read logic HIGH when the switch is
de-press.
As a VR (Variable Resistor): This is
optional. User has to solder 10 POT on to
the board. It’s operating as a voltage
divider of VCC.
As an 1-Wire Thermometer (DS18S20):
This is optional. User has to solder 3-PIN
DS18S20 on to the board, pin1 GND, pin2
DQ, and pin3 VCC. The 1-Wire data can
be read from an I/O pin. Do not connect
VR when using this option.
Description
Operation:
MR-BusIO-SWTM BusIO Push Button Switch Input BOARD
User Manual
Copyright © 2007 MicroResearch
GRAVITECH GROUP WWW.GRAVITECH.US
All of the accessories are available for
purchase via our website. If you don’t see
the item you need, please contract our
sales department at sales@gravitech.us
• DS18S20 IC
The DS18S20 Digital Thermometer
provides 9-bit centigrade temperature
measurements and has an alarm functio n
with nonvolatile user-programmable upper
and lower trigger poi nts. The DS18S20
communicates over a 1 -Wire bus that by
definition requires only one data line (and
ground) for communication with a central
microprocessor.
• 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.
FIG 1: MR-BusIO-SW Board Layout
FIG 2: MR-BusIO-SW Schematic
Accessories
MR-BusIO-SWTM BusIO Push Button Switch Input BOARD
User Manual
Copyright © 2007 MicroResearch
GRAVITECH GROUP WWW.GRAVITECH.US
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