2.1.28, initiation update to PXT v5.28.24 (#54)

docs/reference/input/temperature.md

@@ -7,18 +7,23 @@ The @boardname@ can find the temperature nearby by checking how hot its computer
 input.temperature();
 ```
 
-### Returns
+## Returns
 
-* a [Number](/reference/types/number) that means the Celsius temperature.
+* a [number](/types/number) that is the temperature in degrees Celsius.
 
-### How does it work?
+## How does it work?
 
 The @boardname@ checks how hot its CPU (main computer chip) is.
 Because the @boardname@ does not usually get very hot, the temperature of the CPU
 is usually close to the temperature of wherever you are.
 The @boardname@ might warm up a little if you make it work hard, though!
 
-### Example: @boardname@ thermometer
+Learn more about how the @boardname@ can detect hot or cold in this video:
+
+https://www.youtube.com/watch?v=_T4N8O9xsMA
+
+
+## Example: @boardname@ thermometer
 
 The following example uses `temperature` and `show number` to show the temperature of the room.
 
@@ -28,31 +33,31 @@ basic.forever(() => {
     basic.showNumber(temp)
 })
 ```
-### Example: Fahrenheit thermometer
+## Example: Fahrenheit thermometer
 
 This program measures the temperature using Fahrenheit degrees.
 Fahrenheit is a way of measuring temperature that is commonly used in the United States.
 To make a Celsius temperature into a Fahrenheit one, multiply the Celsius temperature by
-``18``, divide by ``10`` and add ``32``.
+``1.8`` and add ``32``.
 
 ```blocks
 basic.forever(() => {
     let c = input.temperature()
-    let f = (c * 18) / 10 + 32
+    let f = (1.8 * c) + 32
     basic.showNumber(f)
 })
 ```
 
-### ~hint
+## ~hint
 
 Try comparing the temperature your @boardname@ shows to a real thermometer in the same place.
 You might be able to figure out how much to subtract from the number the @boardname@
 shows to get the real temperature. Then you can change your program so the @boardname@ is a 
 better thermometer.
 
-### ~
+## ~
 
-### See also
+## See also
 
 [compass-heading](/reference/input/compass-heading), [acceleration](/reference/input/acceleration)