thermometer based on mikrokontroler


Posted on Feb 6, 2014

This is a circuit of a microcontroller AT89S52 thermometer and LTC1298 12-bit ADC, programs written in C language program with digital filtering and interface the LED display. Reading provides a sensitivity 0. 1C. The hardware block and circuit diagram is shown in the figure below. The thermistor sensor is epoxy. The signal conditioning circuit is


thermometer based on mikrokontroler
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a simple voltage divider. The ADC is 12-bit SPI interface LTC1298 analog to digital. Atmel`s Microcontroller 89S52. The 0. 5 inch display has four digits of 7 segments. The driver of the segment offers 32-bit CMOS output. The 12-bit ADC (LTC1298 or MC3202) are two channels, CH0 and CH1. The signal from ADC input channel 0 thermistor voltage divider is simple. Channel 1 is available for other sensors. The example shown in the diagram is the HIH-3160 Honeywell Relative Humidity Sensor. The ADC chip interconnects with MCU 89S52 with P1. 1, P1. 2 and P1. 3. The LED display has 4 digits. The CMOS shift register 4094 directly drives the LED




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