Issue with LM393 based humidity switch / humidistat.

marcf

Joined Dec 29, 2014
260
Would not this device require a voltage source with a DC value of 0V?

An alternating current to me implies that it must go above and below 0V in equal amounts. If you measure 120vac with a DC voltmeter you get 0 volts.

I guess if you could get the circuit to work on a split supply and could make sure the voltage across the humidity sensor measured 0v... Seems like a lot of trouble to go thru tho.
 

Dodgydave

Joined Jun 22, 2012
9,911
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