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Old 07-06-2010, 08:20 AM
thayou thayou is offline
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Question Water level indicator using LED


I would like to do a project on water level indicator using LED. But I did not have the full description and methods. So i need a full description or any other video files.

Please let me know the details about it

Advance thanks for your help

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Old 07-06-2010, 01:01 PM
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beenthere beenthere is offline
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We have no details either. Can you tell us more about your idea of how the indicator should work?
First comes the hardware, then the software.
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Old 07-06-2010, 01:08 PM
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Bill_Marsden Bill_Marsden is offline
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If you are thinking sensors on of the popular methods uses ping pongs, where a light is shined through a simple acrylic tube with a photosensor of some kind on the other side of the tube. If the ping pong interrupts the light beam you know where the water level is. Usually used for sensing low and high levels in a tank.
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Old 07-06-2010, 03:43 PM
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Then there are level sensors that use probes at that penetrate the tank at different levels with LEDs that show which probes are under water. There have been several posts on level sensing here in AAC, mostly using 4066's.
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Old 07-06-2010, 07:08 PM
DumboFixer DumboFixer is offline
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The magazine "Everyday and Practical Electronics" recently did a water level project based on air pressure in a pipe using a normal air pressure sensor.

I'm think of building one of these myself.
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Old 07-06-2010, 11:40 PM
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You can put the led in the tank at the area where you want the indication to be.

When the LED goes out, you know the water got there.
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