MicroConverter® Technical Note uC015 ADuC824-Based Temperature-Logger

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

MicroConverter® Technical Note uC015 ADuC824-Based Temperature-Logger

Datasheet Thumbnail

Top Searches for this datasheet

INTRODUCTION:
MicroConverter® Technical Note uC015 ADuC824-Based Temperature-Logger
battery-powered temperature logger Figure built demonstrate some features ADuC824 MicroConverter. This document briefly describes what unit does
WHAT DOES:
short, logs precise temperature reading every minutes, storing last hours temperature readings upload temperature reading comes from precision connected directly front-end ADuC824 (note that external signal conditioning circuitry needed). Software running ADuC824 applies linearization routine RTD's transfer function, then stores results on-chip non-volatile Flash/EE data memory until they uploaded this "logging mode" operation, ADuC824 enters powerdown mode between conversions, thereby minimizing logging mode average current consumption allowing extended battery life.
Figure Temp Logger
unit enters second mode operation ("display mode") when press momentary pushbutton. display mode, ADuC824 performs temperature measurement every halfsecond displays result LCD. also sends each result UART serial data that streamed Even display mode, temp logger continues reading every minutes, thereby continuing logging function uninterrupted.
temperature logger displaying real-time temperature, simply make sure jumpers inserted (i.e. open) insert batteries (two CR2032 type), just press pushbutton batteries already inserted. toggle between Celsius Fahrenheit readings, hold button least seconds release don't press pushbutton minutes, temperature logger will automatically switch logging mode conserve power. Pressing pushbutton time restores display mode. access logged data stored past hours operation must connect Figure Screen Displaying Real Time Data temperature logger Windows this, you'll need RS-232 dongle described MicroConverter application note uC006. This device will soon available part newer MicroConverter QuickStart Development Toolkits. Using RS-232 dongle, simply connect temperature logger's header your PC's COM1 COM2 serial port (note that closest VDD) temp logger's pushbutton wake into display mode. Then launch program "TempLoggerGUI.exe" your bring graphical interface temp logger. should window similar screenshot Figure appear begin displaying temperature data you're using COM2, you'll first have select COM2 using "Settings" pull-down menu). view data logged over past hours, simply click "Download logged data" button screen, after brief upload period you'll window similar Figure January 2002
MicroConverter® Technical Note uC015 ADuC824-Based Temperature-Logger
additional functions fairly straightforward, accessed through pull-down menus on-screen buttons. scale logged data output screen, select Celsius Fahrenheit units, choose between external precision sensor installed) ADuC824's on-chip temperature sensor, etc. Note that when external installed, temperature logger defaults using ADuC824's on-chip temperature sensor, otherwise defaults using external RTD.
PROBING FURTHER:
schematic temperature logger shown Figure want more Figure Screen Displaying Logged Data information unit works, refer well-commented source-code assembly file `TempLogr.asm' that accompanies this document. more information ADuC824 other MicroConverter products, visit MicroConverter home page www.analog.com/microconverter where you'll find datasheets, application notes, much more.
Figure Temp Logger Schematic
January 2002

MicroConverter® Technical Note uC015 ADuC824-Based Temperature-Logger

Top Searches for this datasheet

Other recent searches