although i really like flow-through furnace humidifiers, because they don't grow germs, they also waste a lot of water.  i'd like to put an art controller on the solenoid valve to "pulse" it on and off - once the evaporator panel is wet, you can turn off the flow instead of leaving it running, and save 80-90% of the water.  the art controller is almost perfect for this, with its programmability and relay output.  but...
the humidifier and its solenoid valve run on a 27vac transformer.  is there an easy way to power the art controller from that?
 
                  
                             
        
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