8 LED
8 BC337 transistors.
8 3k3 ohm resistor.
8 220 ohm resistor.
Hard disk bus cable as a sensor (See the pictures).
1 jug
2*1.5 volt .
Battery holder.

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I use IDE cable ,you can get it from any old broken PC.
Best Regard
Husham
please and thank you
Abdulla
See it here:
http://www.instructables.com/id/Water-tanks-level-visualization/