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temperature_sensors: Deprecate "NTC 100K beta 3950" thermistor

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It seems the common "beta 3950" thermistors generally follow a
temperature table defined by the new "Generic 3950" definition.  Using
a table that actually follows the "beta 3950" temperature curve is
generally less accurate.  Deprecate the existing "NTC 100K beta 3950"
definition to avoid this common issue.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2021-11-01 13:54:11 -04:00
parent 19aac4055d
commit c179db3d43
11 changed files with 20 additions and 11 deletions
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7
docs/Config_Changes.md
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@ -8,6 +8,13 @@ All dates in this document are approximate.
## Changes
20211110: The "NTC 100K beta 3950" temperature sensor is deprecated.
This sensor will be removed in the near future. Most users will find
the "Generic 3950" temperature sensor more accurate. To continue to
use the older (typically less accurate) definition, define a custom
[thermistor](Config_Reference.md#thermistor) with `temperature1: 25`,
`resistance1: 100000`, and `beta: 3950`.
20211104: The "step pulse duration" option in "make menuconfig" has
been removed. A new `step_pulse_duration` setting in the
[stepper config section](Config_Reference.md#stepper) should be set

4
docs/Config_Reference.md
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@ -701,7 +701,7 @@ heater_pin:
# periods) to the heater. The default is 1.0.
sensor_type:
# Type of sensor - common thermistors are "EPCOS 100K B57560G104F",
# "ATC Semitec 104GT-2", "NTC 100K beta 3950", "Honeywell 100K
# "ATC Semitec 104GT-2", "Generic 3950", "Honeywell 100K
# 135-104LAG-J01", "NTC 100K MGB18-104F39050L32", "SliceEngineering
# 450", and "TDK NTCG104LH104JT1". See the "Temperature sensors"
# section for other sensors. This parameter must be provided.
@ -2058,7 +2058,7 @@ sections that use one of these sensors.
```
sensor_type:
# One of "EPCOS 100K B57560G104F", "ATC Semitec 104GT-2",
# "NTC 100K beta 3950", "Honeywell 100K 135-104LAG-J01",
# "Generic 3950", "Honeywell 100K 135-104LAG-J01",
# "NTC 100K MGB18-104F39050L32", "SliceEngineering 450", or
# "TDK NTCG104LH104JT1"
sensor_pin: