Water Level Indicator System

A water tank system is in need of a level indicator which determines 9 water levels. Ten lamps are used to provide visual indication of the water levels. This is called a water level indicator system which provides the following lamp outputs:

Level 1 - L1 and L2

Level 2 - L2 and L3

Level 3 - L3 and L4

Level 4 - L4 and L5

Level 5 - L5 and L6

Level 6 - L6 and L7

Level 7 - L7 and L8

Level 8 - L8 and L9

Level 9 - L9 and 10

And when there is no water, all lamps will light up.

Before proceeding in constructing the circuit, let us first analyze the problem statement with the use of the truth table. Therefore, it would be easy enough to break down the equation step by  step. This is the reult from the truth table: 

After producing our truth table, we are now able to accede our k-map. This is where our K-map will be applied. 

Note: If you would like not to have an output with the remaining conditions which are not present on the truth table, convert all the asteries into 0 in order to have a 0 output during the application of the rest of the truth table.

Since we have obtained our equations, we are ready to draw our schematic diagram:

And here is our final output: