THERE IS A WATER PUMP WORKS, DRIED OUT, WAIT

Vibronics (Fig. 1) with a water hose hanging on a metal rope in the well. Hose sensors are provided at top water level (VU) and lower level (WELL). The device operation is based on the change in conductivity between the common electrode, which is used as a metal cable suspension pump, electrodes and sensors located in the water and out of it. The condition of the sensors is analyzed by a logical node on the chip DDI (Fig. 2).

 

The work cycle of the machine proceeds as follows. When the sensors of the upper and lower levels are in the water, the conductivity between the cable and the electrodes of both sensors is large, and when the power toggle switch SA1 at the inputs R and trigger levels are set logic 1, resulting in the same level on its direct output, causing the opening of the key transistors VT1, VT2, and the inclusion of relay K1, the contact K1.3, K1.4 connects the pump to the network.

When pumping water the pump will turn off only when the input R DDI will be a logical 0, that is, when the water drops below the lower level sensor. A trigger condition is characterized by a logical value of zero at its direct output, causing the closing of a transistor switch, the off relay and pump.

 

 

 

 

 

 

Fig. 2. Schematic diagram 2 of the automatic device.

 

 

 

Fig. 3. Printed circuit Board with the layout of the elements.

 

 

 

 

 

 

 

 

 

After the pump has stopped, the water level in the well begins to rise and when it reaches the lower level sensor, the input R trigger, you receive a value of 1, which, however, does not enable the pump because at the input there is a voltage of logical zero until the upper level sensor water has not risen. It was only after the rise of water in the well until the upper level sensor input From the DDI voltage will be logic 1, and on its direct output is also set to logical 1; will turn on transistor switch, relay and pump: the process of pumping water is repeated.

Resistors R2, R3, R4, R8 are used to set the required logical values on the inputs of the trigger.