emilsaroian Posted May 27, 2005 Report Share Posted May 27, 2005 Dear friends I need a relaying system that respond to a two level in the tank so the water motor start when the tank only full and turn of when the tank is at a adjustable level can any one help me... ??? Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted May 30, 2005 Report Share Posted May 30, 2005 simple! you can use the principle that water with some impurities is a good conductor of electricity(assuming ur water is not 100% pure) the circuit would be complete,use this current to cause a voltage drop across a resistor,feed this voltage to the base of a transistor,it will turn on causing collector current to flow.this will switch on a relay in collector circuit to complete /break the circuit for your motor(preferably,armature winding) ;D ;D Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted May 31, 2005 Report Share Posted May 31, 2005 hi tnk2k!dont u think that the principle of operation of this too is same as i told.could u please explain it.actually it is not given how the LEDs flash.thanks,prateek Quote Link to comment Share on other sites More sharing options...
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