Merge pull request #1348 from River-b/master

document updates

Documentation/HallSensor.md

@@ -10,11 +10,11 @@ Simply moving the iron will wake it back up into soldering mode. You can also pr
 
 Inside the Sleep Menu is an additional type of sleep setting. Pinecil has an unpopulated footprint (U14) for a hall effect sensor (Si7210). It is possible with the hall sensor to trigger Pinecil to go to sleep after it enters the stand, and Zzzz will appear on the screen. After installing the hall sensor, a magnet is positioned on the stand close enough to the sensor to activate one of ten user selectable settings.
   - 0=off, 1=1000, 2=750, 3=500, 4=250, 5=150, 6=100, 7=75, 8=50, 9=25   (9 has the highest sensitivity to magnets)
-  - Setting of 1 might be used if you solder on PCBs with magnets and do not wish Pinecil to auto-sleep constantly. And a very strong/large magnet would be required on the stand to activate the sensor sleep mode.
+  - Setting of 1 might be used if you solder on PCBs with magnets and do not wish Pinecil to auto-sleep constantly. A very strong/large magnet would be required on the stand to activate the sleep mode if you use setting 1.
   - Setting of 9 would be useful if you only had a small magnet and are not concerned about Pinecil falsely triggering sleep mode near magnetized items/tools.
   - Neodymium magnets are recommended. If using small magnets, 2-3 may be required, but too many can also be detrimental.
   - Actively watch the hall number change (in [debug menu](/Documentation/DebugMenu.md)) while you slowly move the magnet around to seek the best locations & whether you have too many or too few magnets. Positioning the magnet where you have the highest hall number will ensure consistent sleep mode when you place the iron in the stand. This requires some experimenting.
   - Sensor is physically located near the copper contacts for the tip at the front of the handle. Reference [Schematics U14](https://files.pine64.org/doc/Pinecil/Pinecil_schematic_v1.0a_20201120.pdf).
-  - Positioning/type/quantity of magnets is important for best results. Sometimes [too many magnets](https://www.youtube.com/shorts/afkqKwCX00I) breaks the effect by distorting the magnetic field.
+  - Positioning/type/quantity of magnets is important for best results. Sometimes too many magnets breaks the effect by distorting the magnetic field as seen [here](https://www.youtube.com/shorts/afkqKwCX00I). Video shows magnets at the top of the stand, and the pinecil goes correctly into Zzzz with only those magnets. Adding more magnets at the side, the Pinecil did not go to sleep, see PDF below for details on magnetic fields.
   - Orientation of North and South faces of magnets is important to increase reaction of the hall sensor [SI7210-B-00-IV](https://www.silabs.com/documents/public/application-notes/an1018-si72xx-sensors.pdf).