- Sat Sep 02, 2017 4:53 pm
#196017
I was intrigued looking at this Sparkfun product so I pulled out my multi-meter and measured resistance through water. Result: it's an open circuit. Ok so the product uses a digital TTL on/off (HIGH/LOW) signal to detect the water but the effect of the water must either increase or decrease conductivity for the Attiny MCU to detect a switching state change and that doesn't seem to be happening so does anyone know the theory for this circuit?
I've ordered one to try it out but how is it detecting the water? Thanks!
I've ordered one to try it out but how is it detecting the water? Thanks!