Perhaps there could be an arm resting on the paper roll that is connected
to the shaft of a pot. As the paper is depleted, the pot rotates. You can
then use analog comparators to determine various paper levels. If you run
the pot into an ADC on a microcontroller, you could do some math to
determine how many meters of paper are left on the spool.

Good luck!

Harold
https://w6iwi.org


On Sat, March 22, 2025 2:33 pm, abowman89 via GreenKeys wrote:
> Yes, Stan V is 100% correct.  Id like a two level trigger,  but that
> being said I'm fine with a single switch and a relay,  it's more of
> preference of mine since I'm down there enough id more then likely see a
> light.  I work rotating 12s in maintenance so my schedule is all over, so
> im not inclined to test fate either lol.         I did snoop around
> and find a page with the breakdown for the switch kit but I think I'm just
> going to make a bracket with some kind of follower and a swich.Sent via
> the Samsung Galaxy S24+, an AT&T 5G smartphone

--
Not sent from an iPhone.
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