-=> On 29 Sep 96  09:57:46 you wrote to me <=-

Hi Joshua,

MS>> We want to pretend that a resistive temperature sensor is one
MS>> pot of a proportional joystick, thus turning Amy into a
MS>> computerised thermometer.  :)

MS> Well, the original design specified NTC (negative temperature
MS> coefficient) sensors, since these are supposed to be more
MS> linear.

JM> The one advertised at Jaycar (50cents each) are NTC type - 470
JM> ohms at 25 degrees C.  It would work quite well.

Hmmm...  I asked about temperature sensors at Jaycar in Sydney &
they said they didn't have any.

JM> There really isn't a great deal of difference between PTC and
JM> NTC sensors when talking linearity, with either sensor you will
JM> have to calibrate them at a number of temperatures.  If you
JM> really want a linear temperature sensor then you will have to
JM> get a Platinum one (neither PTC or NTC)

That makes sense, I was only repeating what I heard.

JM> I can't see the design being too complex - do you have any code
JM> that will read the sensor??  If you send some details I would
JM> like to have a go at it also.

No, I don't have the code, but I could probably write it.  Perhaps
you should ask Dave Freeman or Richard McElvenny, who started this
thread.

Michael Stapleton of Graphic Bits.

 * AmyBW v2.10 *
... This tagline is encrypted
--- AdeptXBBS v1.07f (Registered)