Wednesday, May 4, 2011

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Temperature Meter Telecommunication Technologies

Good day today I bring a temperature meter using PIC 16F876

This is a very basic circuit putting the NTC (sensor) directly to a microcontroller input ...

is only for laboratory and to save the note.

The higher the temperature the lower the resistance at the NTC. PTC sensors are also what would be reversed at temperatures greater resistance.

If you want to see the code in C click to read more ->



# include "16f876.h"
# device adc = 10 # fuses XT
, # use
NOWDT delay (clock = 4000000)
# include / / Needed for mathematical calculations
# include

void main () {float
tv, tr, temp, y; / / Variables
equation int16 value;
   lcd_init();
   setup_port_a( ALL_ANALOG );
   setup_adc( ADC_CLOCK_INTERNAL );
   set_adc_channel( 0 );
   delay_us(10);
   do {
      value = Read_ADC();
      tv = 5.0 * value / 1024.0;
      tr = tv * 10000.0 / (5.0 - tv);
      y = log (tr/20000.0)
y = (1.0/298.15) + (y * (1.0/4050.0));
; temp = 1.0 / y;
temp temp = -273.15;
printf (lcd_putc, "\\ nT =% 04.2fC", temp) ;
} while (TRUE);}
hope you bail out.

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Title: Telecommunication Technologies
Class Notes - ETN
1038 Teacher: Mr. Jose Campero
Transcript: Vladimir A. Vera Zalles
Universidad Mayor de San Andres
May-2009

Format: pdf
Download Link: Here

Content:
practice1: Digital cable transmision
Practica2: Measure Optical Power
Practica3: Optical Spectrum Analyzer
Theme 1: Communication System Fiber Optic
Topic2: Systems CATV
Tema3: Application Protocol mobile phone carriers.

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telecommunication systems


1011 ETN
Telecommunication Systems
2 chapters Nauls Made by Alex Arce in 2007

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Tele 2

Title: Notes Telecommunications II - 1016 ETN

Author: Luis F. Univ Gonzales Solares

Teaching matter: Mr. Jose Campero
Format: pdf
Download Link: HERE



Index:
Chapter 1: Digital Hierarchies
Chapter 2: Applied Statistics Telecommunications
Chapter 3: Information Theory