[SOLVED] Tiny Digital Thermal Sensor using PIC18F4520

[InNeedOfHelp]

Hello everyone ,

I am doing a Tiny Digital Thermal Sensor using PIC18F4520 as my project. The requirement of this project is to allow us to see the room temperature in the room and displaying the temperatre readings at the LCD screen . If the temperature exceeds a limits that i set , AST1109MLTRQ which is a buzzer will be activated to alert us.

The schematic of my board is on page 10 of the Pdf.

View attachment Schematic.pdf

i'm using C programming n MPLAB IDE tool.



This is the Pin diagram.


This is my board..

i need some inspiration on how to start the project as i only learned C# in the polytechnic...

Thank You very much

Regards,

In Real Need Of Help

 

[picgak]

You can get good inspiration from Mr Tahmids Blog in this forumhttps://www.edaboard.com/blog/1809/

 

[jayanth.devarayanadurga]

Are you using CCS C, Hi Tech C or C18 Compiler? May I know why there is 3 PIC's in the schematic you have posted?

Here is a mikroC Pro Code.

 

[InNeedOfHelp]

picgak: but im doing pic18f and not pic16f , will the programm work ?
jayanth : C18 Compiler. im only using MircoChip U1 . The rest can be ignore

- - - Updated - - -

jayanth : to be exact im using the 40pins chip

 

[jayanth.devarayanadurga]

I have used PIC18F452 and not PIC16F. You can use any PIC which has I2C support. I don't have C18 and I don't know the coding method of C18.

 

[InNeedOfHelp]

F4520 and F452 got any difference?? what is I2C ?

 

[jayanth.devarayanadurga]

Check the datasheet of PIC18F4520 and PIC18F452.

what is I2C?

http://www.i2c-bus.org/

 

[InNeedOfHelp]

what do you mean by I2C support?
For my case , I2C is connected to Pin SDA and SCL of PIC18F4520..

 

[jayanth.devarayanadurga]

what do you mean by I2C support?

If your PIC has SCL, SDA, SDI lines then it supports SPI and I2C communication. I2C is a kind of serial communication. Your TC74 is a serial decice.

 

[InNeedOfHelp]

TC74 is the sensor to see if is high or low temperature.. my PIC doesnt have SPI AT ALL

 

[jayanth.devarayanadurga]

I told you TC74 used I2C. You need and you have I2C in your PIC. You don't need SPI.

 

[InNeedOfHelp]

so how do start doing the program?