High-performance water level automatic controller circuit

Circuit working principle: When the water level in the water tank is lower than the sun point, F. , F2 composed of
RS flip-flop, Q outputs high level , the relay operates, and the water pump pumps water; when point B is immersed
in water, pin 6 of F2 becomes high level, the RS flip-flop maintains its state, and the water pump continues to
pump water. As the water level rises, when the water level reaches point 　4, F. Pin 1 becomes low level
, Q terminal outputs low level, the relay is released, and the water pump stops; when the water level drops
below point A, F. The l pin becomes high level , the RS flip-flop enters the hold state again, and the water
pump still stops. Only when the water level is lower than point B, the water pump restarts, and the above process is repeated
. It is important to point out that the above process is when the water level in the well is higher than point D
; if the water level in the well is lower than point D, no matter what state the RS flip-flop is in, it will
be reset, that is, the Q terminal outputs low power. This stops the water pump and prevents the water pump from idling and
burning out, and also achieves the purpose of energy saving.