Automatic Water level Controller Circuit

Automatic water level controller circuit helps to control the water pump automatically . it is having 3 terminals High,Low,Com. The motor will be on when the water in the tank is less than two levels i.e high,low and it will not switch off until water get in contact with two levels high,low. this is the tested circuit i have searched a lot in the net and finally i got success and i made it.

Parts List:
1.NE 555--------1
2.CD 4049-------1
3.1K Resistor----3
4.100K----------2
5.470 ohms------1
6.12v Relay------1
7.Sl 100---------1
8.LED-----------1
9.Diode----------1
10.100uf---------1
11.0.01uf--------1


PCB LAYOUT: