code for temperature sensing using pic16f872

[sjjm]

how to use pic16f872

May someone pliz help me with a code for setting a certain temperature and comparing it with a temperature from a sensor connected to a pic 16f872

 

[salma ali bakr]

pic16f872 thermistor

i need code also for getting temperature from a thermostat and displaying it on LCD with Celsuis and Fahrenheit

thnx,
Salma

 

[hjamleh]

pic16f872 digital thermometer

It is quite easy doing so. pic16f872 has built in 10-bit A/D, so what you need is to follow up the steps:

1-Prepare for this chip and the programmer and Kit to program and test your code.
2-I suggest you use C lang, CCS from (www.ccsinfo.com) is very good one.
3-Buy the sensor, if you don't know which kind of sensors you will use, try LM35z, it looks like a transistor and has three legs, and translate the teperature to voltage up to 5V and with precetion = 1C/10mV.
Choosing this IC or sensor depends on your decided temperature range, you can find out this from the datasheet (**broken link removed**)
4-activate the sensor and attatch it to suitable PIC pin for A/D to read the data as voltage and make some operations on that data.
5-If you want to attach and LCD, there is pre-programmed library in CCS you can use it.
6- Good Luck

 

[salma ali bakr]

lm35z with pic

how about if i wanna start with a digital thermostat and wanna have temperature in C or F....what would i do...what will i need???

 

[impakt]

pic16f872

Maybe this link helps you: **broken link removed**

 

[BeeBop]

thermometer pic 16f872

Hi there,
Well I think hjamleh's advice is very good for one way of doing this. There are several possible ways, as well. Another would be to read a thermistor with an analog channel of the mcu. There is an example of this in the link posted above by impakt - it is about 2/3 down the page. They were using the CCS compiler, if I remember.
You could also get a digital thermometer. (google for projects with a DS1820, DS18s20, both one wire devices, or for DS1620 or DS1621. There are others, as well.) One of the better projects and source for using an ds18s20 I have seen is https://www.phanderson.com/PIC/PICC/index.html There are also sources for doing this in assembly, and you will find them when you google.
You didn't say which language you were doing this in, but I have seen examples for doing this in many languages, with a myriad of compilers.
Best of luck, have fun!
Regards,
Robert

Added after 8 minutes:

Oh, and

how about if i wanna start with a digital thermostat and wanna have temperature in C or F....what would i do...what will i need???

Well you would just do the math in your micro. Convert C to F, or vice versa. It's easy
Regards,
Robert