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Simple water level indicator..3 LEDS..doubt..

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themaccabee

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Hi all,
I ve found a simple water level indicator with 3 LEDs from
https://www.redcircuits.com/Page95.htm

The circuit is
tanky.th.gif]


The problem is that the Red LED is always slightly turned ON making it difficult for a first time user to distinguish between the desired water levels..
Can somebody tell me how to make this RED LED completely turned off wen any other LED is ON???
[/img]
 

Yes it isn't a well considered design. You can add a resistor (a few k) in parallel to the red LED.
 

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