temp probe using LM35 for thermoelectric cooling
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Posts: 46,084
Hello,
I am a beginner to basic stamps, but my task seems a little complex
(or at least to me). Has anyone utilized the basic stamp 2 as
temperature controller using readings from a LM35 sensor probe in
order to perform switching of a mechanical relay controlling a
thermoelectric module (or peltier junction)? I know that is a mouth-
full, but I look forward to hearing from someone who is familiar with
some of this concept.
I am a beginner to basic stamps, but my task seems a little complex
(or at least to me). Has anyone utilized the basic stamp 2 as
temperature controller using readings from a LM35 sensor probe in
order to perform switching of a mechanical relay controlling a
thermoelectric module (or peltier junction)? I know that is a mouth-
full, but I look forward to hearing from someone who is familiar with
some of this concept.
Comments
> (or at least to me). Has anyone utilized the basic stamp 2 as
> temperature controller using readings from a LM35 sensor probe in
> order to perform switching of a mechanical relay controlling a
> thermoelectric module (or peltier junction)? I know that is a mouth-
> full, but I look forward to hearing from someone who is familiar with
> some of this concept.
I use LM335 to measure temperatures at high altitude. The voltage
varies as the temperature changes. Since it's an analog signal, the
voltage must be inputted to a ADC first. I like using the MAX186
because it gives me 12 bits of resolution. Besides, MAXIM-IC will
send you two for free!
Paul
I just got a hot tub controller going using LM34s( not LM35s). It was quite
easy, after I discovered (with much help from Tracy and Pat on this list)
what my hardware issue was. The code is simple, and you are welcome to mine
if you would like it. It maintains the tub at a predetermined temp, has
basic error checking (too hot, too cold, indicating a problem). I am using a
LTC1298 ADC to interface the Stamp to the LM34s. If you want details has to
how I made my probes and so on (had to be waterproof) feel free to e-mail me
off list.
Jonathan Peakall
Original Message
From: "i_am_deon" <i_am_deon@y...>
To: <basicstamps@yahoogroups.com>
Sent: Monday, November 25, 2002 12:59 PM
Subject: [noparse][[/noparse]basicstamps] temp probe using LM35 for thermoelectric cooling
> Hello,
>
> I am a beginner to basic stamps, but my task seems a little complex
> (or at least to me). Has anyone utilized the basic stamp 2 as
> temperature controller using readings from a LM35 sensor probe in
> order to perform switching of a mechanical relay controlling a
> thermoelectric module (or peltier junction)? I know that is a mouth-
> full, but I look forward to hearing from someone who is familiar with
> some of this concept.
>
>
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>
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>
you are doing. You'll need an A/D converter in between the sensor and the
stamp. Some protection for the stamp from the relays maybe even some type of
driver for them depending on how much current they need. The peltier devices I
have seen are kinda power hungry, couple of amps at least, so you'll need a good
power supply. If you need some detailed help email me off list and I think I
can get you started pretty quick.
Original Message
From: i_am_deon
To: basicstamps@yahoogroups.com
Sent: Monday, November 25, 2002 12:59 PM
Subject: [noparse][[/noparse]basicstamps] temp probe using LM35 for thermoelectric cooling
Hello,
I am a beginner to basic stamps, but my task seems a little complex
(or at least to me). Has anyone utilized the basic stamp 2 as
temperature controller using readings from a LM35 sensor probe in
order to perform switching of a mechanical relay controlling a
thermoelectric module (or peltier junction)? I know that is a mouth-
full, but I look forward to hearing from someone who is familiar with
some of this concept.
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject and Body
of the message will be ignored.
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[noparse][[/noparse]Non-text portions of this message have been removed]
cirriculum(sp?). It'll help you out a lot I think.
Original Message
From: "i_am_deon" <i_am_deon@y...>
To: <basicstamps@yahoogroups.com>
Sent: Monday, November 25, 2002 12:59 PM
Subject: [noparse][[/noparse]basicstamps] temp probe using LM35 for thermoelectric cooling
> Hello,
>
> I am a beginner to basic stamps, but my task seems a little complex
> (or at least to me). Has anyone utilized the basic stamp 2 as
> temperature controller using readings from a LM35 sensor probe in
> order to perform switching of a mechanical relay controlling a
> thermoelectric module (or peltier junction)? I know that is a mouth-
> full, but I look forward to hearing from someone who is familiar with
> some of this concept.
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>