Searching \ for 'pic to thermistor interface [OT]' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/microchip/devices.htm?key=pic
Search entire site for: 'pic to thermistor interface [OT]'.

Truncated match.
PICList Thread
'pic to thermistor interface [OT]'
2000\01\22@185442 by Robert A. LaBudde

flavicon
face
<x-flowed>At 03:37 PM 1/22/00 -0700, Keith wrote:
>Hello Everyone, I need to interface a fast acting temperature sensor to a
>pic to keep tabs on not smoking muscle wire and I was wondering if a
>thermistor was something with 1/10 sec. response time. Does anyone have any
>experience with this ?

A very small thermistor might have a response time (exp{-1}) of about 1-10 sec.

The best response you will get will be with a small gauge (~ #30-#32) bare
thermocouple junction (e.g., Type -T, which is 1-wire copper). However, you
would then need a 100x-400x differential amplifier to be able to get a
readable voltage in the PIC.

Where did you get this time constant from? What temperature are you trying
to remain below? How long can the wire sustain the max temperature?

I suspect there are a lot of simpler solutions to the real requirements.

You could also monitor energy in a time window directly.

================================================================
Robert A. LaBudde, PhD, PAS, Dpl. ACAFS  e-mail: spam_OUTralTakeThisOuTspamlcfltd.com
Least Cost Formulations, Ltd.                   URL: http://lcfltd.com/
824 Timberlake Drive                            Tel: 757-467-0954
Virginia Beach, VA 23464-3239                   Fax: 757-467-2947

"Vere scire est per causae scire"
================================================================

</x-flowed>

2000\01\22@213417 by Keith Causey

picon face
Hello Robert
I got the response time from my employer. It seemed a bit fast to me but I
think he intends that the device be on and actively moving for a long time.
I have no problem building a 100x - 400x differential amplifier. You
completly lost me when you said "You could also monitor energy in a time
window directly."

> At 03:37 PM 1/22/00 -0700, Keith wrote:
> >Hello Everyone, I need to interface a fast acting temperature sensor to a
> >pic to keep tabs on not smoking muscle wire and I was wondering if a
> >thermistor was something with 1/10 sec. response time. Does anyone have
any
> >experience with this ?
>
> A very small thermistor might have a response time (exp{-1}) of about 1-10
sec.
>
> The best response you will get will be with a small gauge (~ #30-#32) bare
> thermocouple junction (e.g., Type -T, which is 1-wire copper). However,
you
{Quote hidden}

More... (looser matching)
- Last day of these posts
- In 2000 , 2001 only
- Today
- New search...