Does any know how to make a water level sensor using wires and screws?

Does anyone know?
Any help would be appreciated

what about a microswitch and float

Look up on "water level capacitance sensor" which could be made with screws and wire.

Tnx

@exshei

Moved your topic to it's current location as it is more suitable.

Could you take a few moments to Learn How To Use The Forum.
Other general help and troubleshooting advice can be found here.
It will help you get the best out of the forum in the future.

A water level indicator could be made in several ways. Perhaps the most simple for an Arduino project would be a float connected to a pot or preset (looking rather like a toilet cistern ball valve). In that case your single input would be the analog voltage from the pot, relative to 0V.

But from your post I’m guessing you want to simply indicate which of several levels have been reached above a minimal level? If so, the wires would be connected from rust proof screws or bolts etc, acting as probes, positioned at various levels above zero level inside the container/tank/river/bath/etc. Each of these would be connected to 5V via a resistor and the lower end of that would then be an input to a digital input of your Arduino circuit. The lowest probe, permanently in water, would go to 0V.

Some trial and error would be needed to choose the resistor (here acting as a pull-up resistor) as water resistance depends on various factors. 470K would be a good start, or you could use 100K in series with a 1M preset to adjust it. The aim would be to ensure your input pin drops from near 5V to under 2V when the water reaches that level.

Then you could process the inputs to achieve whatever output you have in mind.

I can see various shortcomings/snags of this crude ‘screws and wires’ approach, but it’s a start.

What do you mean by lower end? Where would that be located in?

Terrypin:
A water level indicator could be made in several ways. Perhaps the most simple for an Arduino project would be a float connected to a pot or preset (looking rather like a toilet cistern ball valve). In that case your single input would be the analog voltage from the pot, relative to 0V.

But from your post I’m guessing you want to simply indicate which of several levels have been reached above a minimal level? If so, the wires would be connected from rust proof screws or bolts etc, acting as probes, positioned at various levels above zero level inside the container/tank/river/bath/etc. Each of these would be connected to 5V via a resistor and the lower end of that would then be an input to a digital input of your Arduino circuit. The lowest probe, permanently in water, would go to 0V.

Some trial and error would be needed to choose the resistor (here acting as a pull-up resistor) as water resistance depends on various factors. 470K would be a good start, or you could use 100K in series with a 1M preset to adjust it. The aim would be to ensure your input pin drops from near 5V to under 2V when the water reaches that level.

Then you could process the inputs to achieve whatever output you have in mind.

I can see various shortcomings/snags of this crude ‘screws and wires’ approach, but it’s a start.

exshei:
Does anyone know?
Any help would be appreciated

I thought this sounded familiar, you have already asked the same question in two other topic areas. Is this for a school competition or similar?

zoomkat:
I thought this sounded familiar, you have already asked the same question in two other topic areas. Is this for a school competition or similar?

School competition

Duplicate topic deleted

Cross-posting is against the rules of the forum. The reason is that duplicate posts can waste the time of the people trying to help. Someone might spend 15 minutes (or more) writing a detailed answer on this topic, without knowing that someone else already did the same in the other topic.

Repeated cross-posting will result in a suspension from the forum.

In the future, please take some time to pick the forum board that best suits the topic of your question and then only post once to that forum board. This is basic forum etiquette, as explained in the sticky "How to use this forum - please read." post you will find at the top of every forum board. It contains a lot of other useful information. Please read it.

Thanks in advance for your cooperation.

Hmm - I realised soon after posting that I should have recognised homework or similar!