I am working on a project. A water level indicator using ULN2003. Now I want to integrate a 7 segment display to indicate the water level. How?

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    $\begingroup$ This question is probably better suited to the electronics SE (electronics.stackexchange.com) $\endgroup$
    – L Selter
    Oct 31, 2017 at 8:34

1 Answer 1


I am assuming you have a micro controller driving the ULN2003. How about the following sketch.

connecting 7 segment display to ULN2003

This show how to connect the segments and provide power to the display.

Following chart has some guidelines on how to drive the 7 segment display.

7 segment display drive signals

These should get you started.


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