I've checked the other threads regarding this topic and none works for my application. VERY SIMPLE, 2" ID acrylic tube. 10" high. When the water level reaches near the bottom (3" from bottom) I would like the switch/circuit to close and activate a LED. that's it.
I was looking at some right-angle float switches but they are too big to fit inside a 2" ID tube. anyway, I prefer something simpler than that.. like using two metal rods instead.
some weeks ago I saw a thread on some electronics forum about a level sensor using two metal rods, when there was water between them whey would conduct and the circuit would close. bad thing is I lost the link to the website. they claimed it worked on tap water (didn't work on distilled water because of very poor conductivity.. that's fine coz I use tap water). I remember it involved some electronics but not too fancy. i've been looking for the link it now but can't seem to find it again.
anybody with an idea or a link?
I was looking at some right-angle float switches but they are too big to fit inside a 2" ID tube. anyway, I prefer something simpler than that.. like using two metal rods instead.
some weeks ago I saw a thread on some electronics forum about a level sensor using two metal rods, when there was water between them whey would conduct and the circuit would close. bad thing is I lost the link to the website. they claimed it worked on tap water (didn't work on distilled water because of very poor conductivity.. that's fine coz I use tap water). I remember it involved some electronics but not too fancy. i've been looking for the link it now but can't seem to find it again.
anybody with an idea or a link?