How Can I Measure Fluid Level Without Sensors Using Electronics?

[theecoop]

Hello
I'm new to electronics and trying to learn. I thought the best way for me is to watch videos on youtube and ask questions from some more knowledgeable people than me on the subject.

That being said, I want to try what I believe to be a simple project.
I want to measure the fluid level of a plastic cup without having any sensors inside the liquid.
Help me out if if you see were I might be falling off the wagon per say.

1 - small 2 x 4 in board
1 - LM339N IC Quad Diff comparator 14 dip
4 - led
1 - push button NO
1 - Potentiometer (size unknown)
several resisters (size unknown)
2 -copper contact pads

any help in this would be greatly appriciated.
What I am trying to make this for is to measure the fuel in my ultralight gas tank.
which is out of sight while flying.
Thanks in advance

 

[NobodySpecial]

Sounds like a homework problem - what have you tried / thought about so far.

 

[theecoop]

first I thought I would get a breadboard,and the components listed above and do some testing. just wanting to see if I am on the right track,or if their maybe a component that would be needed or some other knowledge I am not thinking of

 

[Quinzio]

You want to do what ?
Measure fluid in a cup or the gas level in a tank ?

All your trouble is the sensor. Do you know what sensor you will use yet ?
Once you have a reliable (mechanically and electrically) sensor, the rest is easy.

 

[theecoop]

Got it all sorted and done. Thanks