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This is actually a continuation of my blog entry https://www.edaboard.com/blog/1628/ where I have used C language routine. Now its the time to use Assembly Language for PIC. The Code is tested on PIC16F84A with 4MHz crystal. Compiler used MCS-51 under M-IDE Studio.
The associated program...
In this blog entry I will show you how to use a 74HC595 to expand I/O pins using only 3 I/O pins of a microcontroller. The program is tested on a 16F876A at 20MHz.
The associated program shows how to transfer a byte data serially to the 74HC595 and then sets the output accordingly...
The maximum analog voltage you can give to your PIC (directly, without any divider) is 5V. So whatever analog signal you are trying to measure, make sure that the i/p volt to that pin should not exceed beyond 5V. If you want to measure voltage more than 5V, you should use resistor voltage...
There is a fact to mention about the resolution of the A/D converter. Since the converter converts the signals, it takes a certain time. The conversion time of the low resolution A/D takes less time than the conversion time of the high resolution A/D. You have to consider carefully : if you...
Code to display temperature on LCD 16x2 display using LM35 and Pic16F876A, 20MHz crystal
sbit LCD_RS at RC2_bit;
sbit LCD_EN at RC3_bit;
sbit LCD_D4 at RC7_bit;
sbit LCD_D5 at RC6_bit;
sbit LCD_D6 at RC5_bit;
sbit LCD_D7 at RC4_bit;
sbit LCD_RS_Direction at TRISC2_bit;
sbit...
In this project a Passive Infrared (PIR) sensor is used to detect human movement and trigger an alarm. A typical PIR sensor comes pre-packaged with all the logic required to, detect IR radiation from living being and raise alarm. Similar PIR modules have just three pins, two for power supply (up...
To display a floating point number (0.0 to 99.9) on three common cathod seven
segment displays using multiplexing.
In the program variable n accepts the floating point number. It may accept an
input from The result will be 12.6. You can also accept a value from Analog to digital...
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To display temperature (0-99) on two common cathode seven segment displays using multiplexing. Pin a,b,c,d,e,f,g and dp of each seven segment display are connected to PORTB pin 0 to pin 7 through
330 Ohm Resistors.
2 pins of...
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