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

Suraj Grewal says: Jun 11, 2013. 10:07 AM

I also made a handheld version of it with cr2032 cell,skipping the resistors of display to give them just enough charge.

Suraj Grewal says: Jan 19, 2013. 8:22 PM

I made one too just like you'r one-
http://www.youtube.com/watch?v=G-pACEhACZw

macobt (author) in reply to Suraj GrewalJan 20, 2013. 2:27 AM

Good job suraj.

Suraj Grewal in reply to macobtJan 20, 2013. 3:47 AM

thanks

Suraj Grewal says: Oct 12, 2012. 9:52 PM

What does those two arrows represent? General male contact

Suraj Grewal in reply to Suraj GrewalOct 13, 2012. 8:41 AM

had a hard time figuring out russian schematic
those arrows are representing that those are connected to ic.
will upload a schematic soon
and also show pics of my version

nightbringer75 says: Mar 4, 2011. 11:53 PM

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

abtrooper82 says: Mar 17, 2010. 12:56 PM

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

Thanks

macobt (author) in reply to abtrooper82Mar 18, 2010. 12:56 PM

I check the link it's OK

abtrooper82 in reply to macobtMar 20, 2010. 2:01 PM

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

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

Thanks

macobt (author) in reply to abtrooper82Jan 7, 2013. 10:33 AM

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

abtrooper82 in reply to macobtMar 20, 2010. 3:33 PM

thankyou, you are most kind

macobt (author) in reply to abtrooper82Mar 20, 2010. 4:12 PM

If you need any help,just email me.
Regards

dimjan says: Feb 19, 2010. 8:27 AM

geoper2 says: Feb 7, 2010. 8:48 AM

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 ?/

banja711 says: Jan 18, 2010. 9:59 AM

Where is the second LED display on schematics?

macobt (author) in reply to banja711Jan 18, 2010. 11:05 AM

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

banja711 in reply to macobtJan 18, 2010. 12:45 PM

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

macobt (author) in reply to banja711Jan 18, 2010. 1:28 PM

Here is picture,I think I helped.

banja711 in reply to macobtJan 18, 2010. 1:48 PM

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

macobt (author) in reply to banja711Jan 18, 2010. 2:23 PM

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

alexev84 says: Oct 30, 2009. 3:57 AM

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

birdman0_o in reply to alexev84Nov 9, 2009. 12:57 PM

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

Mike

alexev84 in reply to birdman0_oNov 9, 2009. 11:38 PM

uu thanks

macobt (author) in reply to alexev84Oct 30, 2009. 12:49 PM

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

alexev84 in reply to macobtNov 11, 2009. 2:29 PM

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!