Has anyone practical experience on using IRDOTS?

[TEAMYAKIMA]

19 minutes ago, WIMorrison said:

With magnets it is north and south  

 

Good point! No wonder I'm struggling to understand what's going on! 

[Theakerr]

On 26/08/2021 at 02:58, TEAMYAKIMA said:

 

That's very interesting. I've never heard of hall sensors.

 

You say that they are pole sensitive - can you get two types, + sensitive and - sensitive? That might do the trick for me.

 

Can do it with the magnets as someone said but you can also do by by turning the sensor through 180.  They are very useful in that you can set the sensor up so that it is south pole activated but all other magnet sensors are north pole activated - reed switches don't care which pole attracts them.  Thus, all sensors are activated if the magnets has their south pole facing the sensor but all except the hall sensor are activated if the magnet poles are set with the north pole down.   I have also been playing with latching relays so that not all sensors are active at any one time.  There are potentially an infinite number of combinations of on/off permutations and latching relays (as well as hall sensors) are dirt cheap from Ali express.

Edited August 27, 2021 by Theakerr
Addition