PIC example : using a diode as temperature sensor

[BrunoG]

Hi,

I would like to share this idea with you :

http://www.micro-examples.com/public/microex-navig/doc/098-temperature-sensor.html

I describe how to use a simple silicon diode as a temperature sensor with a
PIC, to make a cheap, quick and nasty digital thermometer

Questions & comments are welcome !

Thanks,

Bruno

 

[Deefoo]

Hi,

I would like to share this idea with you :

http://www.micro-examples.com/public/microex-navig/doc/098-temperature-sensor.html

I describe how to use a simple silicon diode as a temperature sensor with a
PIC, to make a cheap, quick and nasty digital thermometer

Questions & comments are welcome !

Thanks,

Bruno

Nice pictures. One thing though (I am so sorry, but I can't help myself): it
is "analog" not "analogic".

--DF

 

[Luhan]

I describe how to use a simple silicon diode as a temperature sensor with a
PIC, to make a cheap, quick and nasty digital thermometer

Questions & comments are welcome !

Yes, looks interesting. Here is an experiment I put together. It uses
a second diode to ballance out the one sensing temperature. With the
values shown, I get about a 1 volt change with my finger on one of the
diodes. Also, this circuit works with just a +5 supply on the op-amp
making it great for interface to microcontrollers.

http://members.cox.net/berniekm/temp1.gif

Luhan

 

[BrunoG]

Nice pictures. One thing though (I am so sorry, but I can't help myself):
it
is "analog" not "analogic".

--DF

Ouch ! You are right, sorry for the "frenchism"...

Thanks ;-)

Bruno
http://www.micro-examples.com/public/microex-navig/doc/098-temperature-sensor.html

 

[Fred Bloggs]

I would like to share this idea with you :

http://www.micro-examples.com/public/microex-navig/doc/098-temperature-sensor.html

I describe how to use a simple silicon diode as a temperature sensor with a
PIC, to make a cheap, quick and nasty digital thermometer

Questions & comments are welcome !

That's okay, but in the old days I just kept a single assembly of diode
already soldered to long teflon insulated leads and used the diode check
function on the Fluke VOM, which reports Vf to one part in 4000 or
something, to read the temperature rise. I also upgraded this to measure
water temperature when I was canning tons and tons of homemade cucumbers
for pickles- yummmm- a 10 year supply of perfectly formed, flavorful and
naturally produced pickles grown from five plants on a trellis not 10' long.

 

[John Fields]

That's okay, but in the old days I just kept a single assembly of diode
already soldered to long teflon insulated leads and used the diode check
function on the Fluke VOM, which reports Vf to one part in 4000 or
something, to read the temperature rise. I also upgraded this to measure
water temperature when I was canning tons and tons of homemade cucumbers
for pickles- yummmm- a 10 year supply of perfectly formed, flavorful and
naturally produced pickles grown from five plants on a trellis not 10' long.

 

[Fred Bloggs]

Haha- should have said homegrown...