Level 555 a control circuit diagram

  
As shown for the level control circuit. The control circuit consists of step-down rectifier circuit, trigger circuit 555 (IC1, IC2), relay control circuit. Where the buck recti

fier circuit of the entire control circuit to provide the DC voltage corresponding to the flip-flop IC1 low water tower water pump control circuit, triggering circuit IC2 corresponding to the high-water wells to pump water for the control circuit.When the water level inside the water tower probe B, D tower above the water line, IC1 pin is ground level, so that IC1 be set, high pin output relay J1 pull, contact J1- 1 is closed, because the motor is energized and pumping operation performed pumping; when the water level rises to probe a, corresponding IC1 is reset, low output enable J1 release, contact J1-1 disconnect power pumps stopped, thus the water tower to achieve automatic control. Well placed in the probe B, D, under normal circumstances, should a certain depth below the water surface, so IC2 (555) by 2 feet high and reset, low output enable pin J2 pull, touch point J2-2 is closed. When leaving due to continuous pumping B, D EXPLORATION high in the water, IC2 occur due feet set low, high output enable pin J2 release, contact J2-2 disconnect the motor off electricity stopped, thus avoiding motor idling, while the water level of wells for testing.




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