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PIC16F84A Thermometer

video PIC16F84A Thermometer

This is simple thermometer with just few components.
The brain is PIC16F84A and sensor is DS18B20
Range of sensor is -55 to 125°C is possible if ONLY the sensor is in that area not the whole device!
The schematic and other stuf to make this thermometer you can find on my blog:

maco PIC Projects

24 comments

Mar 4, 2011. 11:53 PMnightbringer75 says:

is there an asm file of this with english comment?not other languages?coz i cant understand the program...

Mar 17, 2010. 12:56 PMabtrooper82 says:

link on blog to HEX code does not work, please post here or provide a new link

Thanks

Mar 18, 2010. 12:56 PMmacobt (author) says:

I check the link it's OK

Mar 20, 2010. 2:01 PMabtrooper82 says:

http://www.pic16.nm.ru/site/thermometer/thermometer_soft.zip

This link does not work, can you email me the file.

Thanks

Mar 20, 2010. 2:30 PMmacobt (author) says:

hello again
And here is other link to download the hex code

Mar 20, 2010. 3:33 PMabtrooper82 says:

thankyou, you are most kind

Mar 20, 2010. 4:12 PMmacobt (author) says:

If you need any help,just email me.
Regards

Feb 19, 2010. 8:27 AMdimjan says:

Feb 7, 2010. 8:48 AMgeoper2 says:

he is probably multiplexing the two led displays
the thing is that this is not an instructable mate its just a video of how your project works ... so please provide with the steps ?/

Jan 18, 2010. 9:59 AMbanja711 says:

Where is the second LED display on schematics?

Jan 18, 2010. 11:05 AMmacobt (author) says:

The thermometer in original schematis is with 4 segments,but I built it with 2 segments,other 2 show when thermometer is measuring below zero and other show half degree,example 26.0 or 26.5

Jan 18, 2010. 12:45 PMbanja711 says:

I understand that, but I can`t recognize second LED display on schematics... I see just one! How to wiring second?

Jan 18, 2010. 1:28 PMmacobt (author) says:

Here is picture,I think I helped.

Jan 18, 2010. 1:48 PMbanja711 says:

Ok! I understand... RB0-RB7 is a same for first and second number! RA0,RA1-Anode
I found DS 18B20+...Is it ok?

Jan 18, 2010. 2:23 PMmacobt (author) says:

Yes,RA0 for first and RA1 for second number(anode)
And sensor is ok DS18B20
If you make post some pics.
Regards maco bt

Oct 30, 2009. 3:57 AMalexev84 says:

can i replace the thermic sensor used with a lm35 one with minimum modification?

Nov 9, 2009. 12:57 PMbirdman0_o says:

The ds18b20 uses Dallas' one wire protocol. To use a lm35 you just need a A/D converter which most uC's have.

Mike

Nov 9, 2009. 11:38 PMalexev84 says:

uu thanks

Oct 30, 2009. 12:49 PMmacobt (author) says:

I dont know about that, I am not profesional in programming,sorry

Nov 11, 2009. 2:29 PMalexev84 says:

excuse my "complicated-preision" questions...i'm not very good at this...i need to ask you: are those led displays you use,common anode or cathode ones?does it make any diference?mine's have a double common anode pins with op. voltage between 1.8-2.2V.and the second question is why did you used 15k resistor(alot of ohms) for the pic and the led displays....you use 5 volts for powering the pic...isn't that the actual op. voltage of the pic anyway?Thanxs in advance!