MR-BUSIO-SW Gravitech

TM MR-BusIO-SW BusIO Push Button Switch Input BOARD User Manual GRAVITECH.US uResearch GRAVITECH GROUP Copyright 2007 MicroResearch GRAVITECH GROUP WWW.GRAVITECH.US TM MR-BusIO-SW BusIO Push Button Switch Input BOARD User Manual Description 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 Operation: 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. Its 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. Copyright 2007 MicroResearch GRAVITECH GROUP WWW.GRAVITECH.US