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"WATER IS PRECIOUS, SAVE EVERY DROP"

water tank alarm

No Living Beings exist without Water.
So we have to save water in any way that we can.

A considerable amount of water will be lost everyday, during the refilling of water tank by overflowing it in our home.

We can avoid this, if you have a little knowledge with Electronics.

I am introducing the following simple circuit which consists of only 3 Transistors (Commonly Available) and a melody generating IC UM66.

You can replace UM66 with any alarm generating IC according to your convenience.


CIRCUIT DIAGRAM OF WATER TANK OVERFLOW ALARM



circuit diagram simple water overflow alarm





Mount this circuit on PCB or a breadboard.



CIRCUIT EXPLANATION



The transistors Q1 and Q2 forms a "Darlington Pair" , in which when a high resistance appears across the input it will trigger and producing an output Voltage.
This Voltage is used to switch the alarm circuit consisting of UM66.

The transistor Q3 will amplify the melody sound produced by UM66 IC and it will drive the speaker.


Note:-

Try to reduce the length of Probe, used to link with water tank.

The circuit is powered by a 9V Battery.

Transistors Q1 and Q3 may be any of the Common NPN type.

You can try our another projects with the same Circuit Diagram:- RAIN DETECTOR ALARM CIRCUIT


Touch Sensitive Switch or Security Alarm



Post a Comment

  1. i have tried this but it producing some noise when connected it supply when water not in contact with wire pls give me rply

    ReplyDelete
  2. Hi,

    I tried this circuit and works very well...

    Keep the input terminals away from each other, without getting short circuited (dont touch across these terminals because our skin too offers a conducting path)....

    Try it.....

    All the best

    ReplyDelete
  3. but still it producing some light music sound when contacts are away from each other

    ReplyDelete
  4. i have tried but i dont got output, i put wires directly in the water is it correct?

    ReplyDelete
  5. Yaa, but before dipping into the water test your circuit whether it is working.
    By short circuiting the input terminals.

    ReplyDelete
  6. can u plz provide a complete details of the requirements and connection details...

    ReplyDelete
  7. Hi Tittu,

    I am curious... Can I drive an LED instead of using speaker for alarm?

    ReplyDelete
  8. @Abdullah

    Its possible to drive an LED using this circuit. but for that you don't need a um66 ic..

    ReplyDelete
  9. This is very healpful blog. My congratulation!
    my blog- my2bee.blogspot.com

    ReplyDelete
  10. are there's replacement with ic um66, because i hard to find this IC in local store, thanks ...

    ReplyDelete
  11. how do we combine these two circuits?

    ReplyDelete
  12. Sir can I get working of circuit of this without ic

    ReplyDelete

 
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