MR-BusIO-SWTM BusIO Push Button Switch Input BOARD User Manual GRAVITECH.US uResearch GRAVITECH GROUP Copyright (c) 2007 MicroResearch GRAVITECH GROUP WWW.GRAVITECH.US MR-BusIO-SWTM 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-BusIOMAIN 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. 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. Copyright (c) 2007 MicroResearch GRAVITECH GROUP WWW.GRAVITECH.US MR-BusIO-SWTM BusIO Push Button Switch Input BOARD User Manual Accessories 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 * * 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(c). It is a quick and easy way to control up to 8 daughter boards. DS18S20 IC The DS18S20 Digital Thermometer provides 9-bit centigrade temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18S20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. FIG 1: MR-BusIO-SW Board Layout FIG 2: MR-BusIO-SW Schematic Copyright (c) 2007 MicroResearch GRAVITECH GROUP WWW.GRAVITECH.US MR-BusIO-SWTM BusIO Push Button Switch Input BOARD User Manual Notes Contact Us We maintain a website where you can get information on our products, obtain literature and download support files. Visit us online at: WWW.GRAVITECH.US For sales questions or to place and order, direct your e-mails to sales@gravitech.us. Refer to our website for product pricing, shipping rates, payment instructions, and for other info we need to complete your order. Use our online Forum or e-mail your technical support questions to support@gravitech.us. We try to respond to your questions the same day. Disclaimer: MicroResearch reserves the right to modify its products or literature, or to discontinue any product at any time without prior notice. The customer is responsible for determining the suitability of any device for any application developed using MicroResearch components. Copyright (c) 2007 MicroResearch GRAVITECH GROUP WWW.GRAVITECH.US Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Gravitech: MR-BUSIO-SW