Looking for variable LED flasher circut & moisture sensor

[John]

If anyone has or knows where I can find easy plans for these please let me know...Thank you

[Gary Lecomte]

Are These TWO Separate Items?

A Moisture Sensor is easy.
Variable LED Flasher, also easy.

Or s this a Moisture Sensor that Flashes an LED?
Not so Easy.

[lamazoid]

as i guess, he wants variable flash intensity depending on moisture level.
this is (very)easy to do with microcontroller.
or maybe some pwm ic also could be utilized for this... maybe even 555 timer..

[John V]

I was looking for a water sensor to bury in pea gravel in the floor ,where it will soon be under concrete. I would like to have it very low drain and just mounted to a buzzer of some kind in the bottom of the cabinet so a normally open circuit that would be closed by water present. I use to know how to tinker and build easy circuts like this. I was just hoping someone here would have the know how to show me the easiest way. thanks

[lamazoid]

the easiest way to this lies in proper construction plans underfloor space should be properly drained and ventilated to avoid moistening.

[John V]

Perhaps I should of explained myself better. This is a trouble spot at a drain inside the floor of a slab house. old cast pipes that have been fixed but There is a floor drain there where a lot of other pipes tie into it. I would just like a sensor that would tell me if the gravel around it is getting wet before it becomes a larger problem. I think I have a simple circuit now that is low drain and hopefully non corrosive enough to bury.

[Gary Lecomte]

Schematic of Water Detector.
With No Moisture, No Current Draw.

The LED can be Replaced with a Piezo Buzzer, for a Warning Sound.