so I may want to use a XIAO as a data collector to sence when an AC motor pump is running and log these events… so lets say the pump is a basement sump pump and so the pump is controled by a float switch and the float switches 110v wall power. for whatever reason I do not want to change the situation… I just want to sense when electric power… current is flowing in the wire and feed this data to a XIAO for post processing.
The question is how to best perform this sensing?
I am assuming a clip on coil is the best but wondering if anyone has any innovative solutions?
So, that is the device that is used, The “CT” as it’s known.. Will do exactly that , Sense the amount of Current flowing in the Wire… Many home automation systems use them, “emporia” is one I have installed and it worked very well using many pairs of the CT’s of differing sizes. Each gets connected to a input of the system and logs the events.
Just like the Grove “EMG” with the 3.5" jack Pad inputs & I2C output.
i was wondering if anything would be smaller than a current transformer (CT) another problem with CT is you have to isolate one wire… so you cant just clip the cord if the neutral is also in it… i was liking no contast… wondering if magnetic… but magnetic doesnt work as easy for AC.. but i guess even with magnetic AC is should be relitavly easy to tell if the unit is running or off..
PJ 