Hello guys, i'm working on a project to automatically control water flow to the main tank based to water level in the tank itself.
water pump operates when water level reaches the set point and shuts down when it reaches the marked point.
when water is low (lower than ST1) TR1 is triggered through RY2 and the pump runs, when water reaches ST1 , Q2 Conducts thus it energize RY2 which cuts the supply of the TR1 gate. when water reaches ST2 , Q1 conducts and RY1 gets energized which in turn disconnects TR1 anode from supply then water Pump stops. when water drops below ST1 . Q2 turns off and so as RY2 then TR1's triggered through its gate.
when i run this circuit on breadboard everything runs as planned except the last part (When water drops below ST1 water pump should starts again but sadly it doesn't). please if you can point me to my mistake i'd be very grateful. thanx.
water pump operates when water level reaches the set point and shuts down when it reaches the marked point.
when water is low (lower than ST1) TR1 is triggered through RY2 and the pump runs, when water reaches ST1 , Q2 Conducts thus it energize RY2 which cuts the supply of the TR1 gate. when water reaches ST2 , Q1 conducts and RY1 gets energized which in turn disconnects TR1 anode from supply then water Pump stops. when water drops below ST1 . Q2 turns off and so as RY2 then TR1's triggered through its gate.
when i run this circuit on breadboard everything runs as planned except the last part (When water drops below ST1 water pump should starts again but sadly it doesn't). please if you can point me to my mistake i'd be very grateful. thanx.