Re: Converting a NTC voltage into temperature in Celcius

On 11/04/2025 7:47 pm, Gerhard Hoffmann wrote:

Am 11.04.25 um 08:13 schrieb Bill Sloman:
 

Whether a reverse biased diode breaks down in Zener mode or avalanche mode depends entirely on the diode you have selected.
>
if it breaks down at less than 5V reverse voltage it is breaking down by the Zener mechanism (with a negative temperature coefficient) , and if it the breaks down at an 8V or a higher reverse voltage the avalanche mechanism is dominant (with a positive temperature coefficient.

 Noisewise, the mode is easy to be seen. The avalanche effect is MUCH
worse. Already small avalanche contributions spoil the pot.
 in
 < https://www.flickr.com/photos/137684711@N07/24411798996/in/album-72157662535945536/    >,
 I have measured the NXP BZX84 family. The 2V7 or 5V6 in the type number
mean exactly that. At 4V7 the low noise property is already gone.
 The pics to the left & right show some LEDs and regulators.
 BTW: the leftmost pic of the peaceful Blau river valley is where the
Gauss family runs a hotel. Yes, "our" Mr. Gauss. They have an oil
painting of him in the dining room.
 ??? of him / of his: which one is correct?????

If it's a painting of Carl Friedrich Gauss, "of" is correct. If it were a painting by Carl Friedrich Gauss, it would be one of his paintings.
https://en.wikipedia.org/wiki/Carl_Friedrich_Gauss
doesn't suggest that he ever went in for  painting.

BTW2: For the sake of scientific honesty, Prof. Zener sued the semi
industry that they should not use his name for avalanche diodes.
They settled for calling them Z-diodes and pretended it referred to the
form of the U/I curve.

Professor Zener was being optimistic. Language is defined by the words people use, and if the majority makes a habit of using words incorrectly that usage becomes part of the language.
--
Bill Sloman, Sydney